IDMEC U. Porto FEUP DEMec INEGI CETRIBibertrib2013/files/CETRIB.pdf · Jorge H O Seabra, Professor...

Jorge H O Seabra,

Professor Catedrático da FEUP, Director do CETRIB 1 of 54

Unidade de Tribologia, Vibrações e Manutenção Industrial

Tribology, Vibrations and Industrial Management Unit

U. Porto FEUP

DEMec

IDMEC

INEGI CETRIB

Unidade de Tribologia, Vibrações

e Manutenção Industrial

CETRIB

Jorge H O Seabra,



Tribology, Vibrations and Industrial Management Unit

Created in January 1991 as a Research Unit of INEGI.

Integrated in Research Unit nº 130 of F. C. T.

“Experimental Mechanics and New Materials”

Integrated in LAETA Laboratório Associado de Energia, Transportes e Aeronáutica.

R&D topics:

� Tribology of machine elements (friction, lubricants / lubrication, wear …);

� Surface engineering and surface coatings;

� Vibration of machines and structures;

� Industrial reliability and maintenance.



CETRIB

Jorge H O Seabra,


Instituto de Engenharia Mecânica e Gestão Industrial Institute of Mechanical Engineering and Industrial Management

Innovation and technology transfer institute, providing the interface between the

Department of Mechanical Engineering of U. P. and industry.

Created in 1986 as a non-profit organization,

recognized by the Portuguese Government as an institution of public interest.

Main activities:

Research and development in mechanical engineering and industrial

management;

Main R&D Contracts:

Industrial Companies (50%), FCT (30%), EU (20%).

Jorge H O Seabra,


Departamento de Engenharia Mecânica - DEMec

Department of Mechanical Engineering

� Owner of Mechanical Engineering Integrated Master Degree

(5 years engineering degree);

� Very strong participation in the Industrial Engineering and Management

Integrated Master Degree (5 years engineering degree);

� Offers a PhD Degree (3-4 years) in several areas of Mechanical Engineering.

Main Scientific Areas:

� Applied Mechanics;

� Automation, Instrumentation and Control;

� Fluids and Heat;

� Industrial Design;

� Materials and Technological Processes;

� Mathematics;

DEMec holds two interface institutes: INEGI and IDMEC.

Jorge H O Seabra,


Faculdade de Engenharia da Universidade do Porto

Engineering Faculty, Porto Universitity

FEUP dates back to 1762, when the Nautical School was born;

In 1911, it was founded as an Affiliated School to the Faculty of Sciences;

Became a Technical Faculty in 1915;

In 1926 gained the status of Faculty of Engineering.

Nowadays FEUP is the largest faculty of Porto University:

� More than 6,000 students, more than 400 lecturers, more than 300 PhDs;

� Budget – more than 50 M€/year.

� 8 Integrated Master Degrees and 21 Master and Doctoral Degrees;

� Departments: Civil, Chemical, Electrical and Computer, Informatics,

Industrial Eng. and Management, Mechanical, Metallurgical and Mining & Ambient.

Jorge H O Seabra,



1. TRIBOLOGY OF MACHINE ELEMENTS

On-going R&D activities:

� Gears, rolling bearings, cam / follower, piston ring / cylinder liner, journal bearings …

� Gear oils, base oils (Mineral, Ester, PAO, PAG), additives, biodegradability, low-toxicity;

� Industrial gear oils; Windturbine gear oils, Bio-oils …

� Greases, Lithium and Polymeric thickeners, bleed oil, Bio greases …

� Gears: low-loss geometry, lubrication, scuffing, micropitting, wear, torque loss …

� Rolling bearings: friction torque, rolling torque, sliding torque, power loss…

� Rolling bearing: oil and grease lubrication;

� Gear coatings, gear materials, …

� Lubricant analysis, failure analysis, machine condition monitoring …

� …



CETRIB

Jorge H O Seabra,



2. SURFACE ENGINEERING AND SURFACE COATINGS


� Tribology of nano reinforced coatings for journal bearings

(together with Chemical Engineering. Department).

� Hard coatings tribology (Ti B2 and other systems).

� Gear coatings – MoS2-Ti, and C-Cr.

� High speed machining;

� Titanium alloys milling and drilling.



CETRIB

Jorge H O Seabra,



3. VIBRATION OF MACHINES AND STRUCTURES


� Vibration analysis/ Experimental modal analysis, Signal analysis: machines, structures,

gearboxes;

� Passive vibration control technologies/ viscoelastic damping treatments, composition cork, shunted piezoelectric devices: circular saw blades, railway wheels, panels, composites with viscoelastic layers;

� Active vibration control technologies/ piezoelectric sensors and actuators: composites with piezoelectric layers, shunted modal piezoelectric transducers;

� Vibroacoustic of vibrating structures: cavity-plate system with viscoelastic damping treatments.



CETRIB

Jorge H O Seabra,



4. INDUSTRIAL RELIABILITY AND MAINTENANCE


� Maintenance of machines, installations, refining installations, …

� Reliability of machines, installations, refining installations …

� RAMS Analysis

� RBM, RCM and TPM

� Lean Maintenance and Management

� (Physical) Asset Management – BS PAS - 55

� Auditing of Reliability and Maintenance

� Lubricant analysis (Viscosity K&D, Pour point, TBN, Oil View, Ferrometry, Ferrography,

Particle counting, Particle filtering, FTIR …)

� Lubricant analysis – steam turbines, compressors, engines, gearboxes …

� Failure analysis (gears, rolling bearings, gearboxes, engines …)



CETRIB

Jorge H O Seabra,



Personnel

The technical personnel of CETRIB integrate 16 specialists

trained in research centres of international reputation:

Tribology Surf Eng Vibrations Maintenance Outras

Alexandre S Sottomayor PhD X

António A Vieira PhD X X

António L M T Ribeiro PhD X Corrosion

António P M Baptista PhD X X

Armando J V Campos PhD X

Arnaldo M G Pinto PhD X Adhesives

Beatriz M M Graça MSc X X

Carlos M Sá PhD SEM

Francisco Silva PhD X X

Jorge H O Seabra PhD X X X

José F D Rodrigues PhD X

Luís A A Ferreira PhD X X

Luís M L Magalhães PhD X X X

Manuel J D Castro PhD X

Ramiro C Martins PhD X X X

Rui Martinho PhD X X



CETRIB

Jorge H O Seabra,



Personnel

Alexandre Gonçalves dos Santos de Santiago Sottomayor

Mechanical Eng, MSc, PhD.

Professor Adjunto ISEP-IPP.

Tribology, Lubricant Rheology

Email: [email protected]

António Aguiar Vieira


Auxiliar Professor FEUP.

Surface Engineering.


António Luís Marinho Tomé Ribeiro


Auxiliar Professor FEUP.

Surface Coatings, Corrosion.




CETRIB

Jorge H O Seabra,



Personnel

António Paulo Monteiro Baptista


Associate Professor FEUP.

Tribology, Surface Engineering, Surface Coatings.


Armando José Vilaça Campos



Tribology, Rolling bearings, Surface Engineering.


Arnaldo Manuel Guedes Pinto



Tribology, Surface Engineering, Adhesives.




CETRIB

Jorge H O Seabra,



Personnel

Beatriz Maria da Mata Graça

Maintenance Eng, MSc

Researcher, INEGI-CETRIB

Lubricant Analysis Specialist. Industrial Maintenance.


Carlos Sá

Electrical Eng, MSc, PhD

Principal Researcher, FEUP-CEMUP

Scanning Electron Microscopy Specialist.

Email: csá@fe.up.pt

Francisco Silva



Tribology, Surface Engineering, Surface Coatings.

Email



CETRIB

Jorge H O Seabra,



Personnel

Jorge Humberto Oliveira Seabra


Full Professor FEUP. Director of INEGI-CETRIB.

Tribology, Gears, Rolling Bearings, Industrial Maintenance.


José Fernando Dias Rodrigues


Associate Professor FEUP.

Vibrations of Machine and Structures.


Luís António de Andrade Ferreira


Associate Professor FEUP. Vice-Dean of FEUP.

Tribology, Surface Coatings, Industrial Reliability and Maintenance.




CETRIB

Jorge H O Seabra,



Personnel

Luís Manuel Leite de Magalhães



Tribology, Surface Engineering, Failure analysis.


Manuel Jorge Dores de Castro



Tribology, Gears.


Ramiro Carneiro Martins


Auxiliar Researcher, INEGI_CETRIB.

Tribology, Gears.




CETRIB

Jorge H O Seabra,



Test Rigs

Pin-on-Disc Machine

It is used to test materials in sliding contact

over a range of load, speed and lubrication regime.

Configurations:

� Rotating pin-on-disc contact;

� Reciprocating pin-on-plate contact.

Applications:

� Fundamental wear studies;

� Friction and wear testing (metals, ceramics,

soft and hard coatings, plastic, polymers and

composites);

� Abrasion tests on materials, thrust washer wear test,

wear and corrosion studies,;

� Wear screening tests for engine components (piston ring, cylinder liner and piston skirt).



CETRIB

Jorge H O Seabra,



Test Rigs

Micro-Scale Abrasion Tester; Ball Cratering Rotation of a ball against a plate in the presence of an abrasive slurry results in

the production of a circular depression.

In the case of coated plates, if the coating is worn through,

a “bulls-eye” depression is observed.

Measurements of the inner and outer diameters of this “bulls-

eye” are easily made and provide an accurate and low cost

method of determining coating thickness.

It is possible to determine the wear coefficient of hard and soft

coatings and monolithic materials by abrasive wear in a ball on

plate contact configuration.



CETRIB

Jorge H O Seabra,



Test Rigs

Reciprocating Tribometer

The block-on-block reciprocating tribometer was designed to

simulate the ring and liner contact in engines.

It is used to test materials in sliding reciprocating motion:

ranges of load - 10 to 260N and frequency - up to 10 Hz.

Four tables in rectilinear alternative motion

(2x30mm fixed course) support the liner blocks.

The upper specimens (ring blocks) are pressed by dead

weights against the liners and transmit the friction force

to a load cell.

� fundamental wear studies;

� friction and wear testing;

� wear screening tests for reciprocating sliding materials.



CETRIB

Jorge H O Seabra,



Test Rigs

Block-On-Cylinder Tribometer

The block-on-cylinder tribometer is used to test materials in sliding contact:

wide ranges of load (70 to 1200N), speed and lubrication

regime.

A rotating steel cylinder (φφφφ = 120) slides against a testing

block, in dry condition or using deep feed lubrication.

Typical applications of the block-on-cylinder machine are

similar to other conventional tribometers:

� fundamental wear studies;

� friction and wear testing (metals, ceramics, soft

and hard coatings, polymers and composites);

� bearing materials wear test;

� wear screening tests for continuous sliding mechanical components.



CETRIB

Jorge H O Seabra,



Test Rigs

Four-Ball Machine The four-ball machine is used to test lubricants under standard (IP 360). Two types of tests:

� scuffing (IP 239), where the upper ball slides against the

3 lower balls,

� rolling pitting fatigue (IP 300) where the upper ball rolls

against the 3 lower balls.

A test was developed to test rolling bearings:

Grease and oil lubrication, contaminated lubricants,

internal friction torque, wear …

Parameters that can be controlled during test:

Applied load, temperature, friction torque, rotation speed,

number of cycles, vibration level.



CETRIB

Jorge H O Seabra,



Test Rigs

Twin Disc Machine The twin-disc machine is frequently used to determine material properties:

� Materials contact fatigue properties,

� Surface contact fatigue,

� Wear resistance.

Surface lubrication is assured by permanent

oil injection into the contact zone.

It is equipped with magnetic sensors

to detect spalls or other significant surface damage.

Control:

� normal load applied to the contact and discs

speed.

� lubricant temperature.



CETRIB

Jorge H O Seabra,



Test Rigs

FZG Machine FZG Gear Test Rig is a back-to-back spur gear rig

with 91.5 mm center distance.

FZG tests are used to determine

gear oil and gear materials properties:

� Scuffing,

� Pitting,

� Micropitting,

� Slow speed wear.

Operating parameters:

� Torque up-to 535 Nm.

� Speed: 60 to 3000 rpm.

� Dip or pressure lubrication.



CETRIB

Jorge H O Seabra,



Test Rigs

Gearbox Test Rig

The Gearbox Test Rig was designed to test

different gearboxes sizes and configurations

as well as different test purposes.

It is a power circulating test bench

using two gearboxes with their

high and low speed shafts connected together.

Tests: Power loss, gear failure, gear oil performance.

Control parameters:

Torque, speed and oil temperature;

Temperatures of testing gearbox and “slave” gearbox.

Speed range: 100 – 4000 rpm; Torque range: 100 – 1350 Nm.



CETRIB

Jorge H O Seabra,



Lubricant analysis

Viscosity Measurement Viscosity has a strong influence on:

� Equipment operation;

� Friction losses;

� Oil film thickness;

Its measurement and trending is critical on used oil analysis.

Test methods:

� ENGLER Viscosity (ASTM D 1665) Kinematic viscosity (cSt) at 400C and 1000C

� VIBRO Viscosity (SV-10) Dynamic Viscosity (mPa.s) from 300C to 1000C

Engler Viscometer



CETRIB

Jorge H O Seabra,



Lubricant analysis

Vibro Viscosmeter (SV-10)

Variation of the dynamic viscosity (mPa.s) with temperature for new and used oil.

Óleo Novo

Óleo Usado



CETRIB

Jorge H O Seabra,



Lubricant analysis

TAN (Total Acid Number - ASTM D974-97)

The determination of the acid number (TAN) by colorimetric

titration can be used as a measure of lubricant degradation.

Total Acid Number measures the total acid concentration in the oil.

As the oil ages and oxidizes, small amounts of acid by-

products are formed in the oil causing the AN to increase.

The degree to which AN has increased over the new oil’s

baseline is an indication of the extent to which the oil has

degraded.

A high TAN typically indicates that the useful life of the

oil has expired and it needs to be changed.



CETRIB

876 Dosimat Plus (Methohm)

Jorge H O Seabra,



Lubricant analysis

Flash and Fire Points (ASTM D 92 – 98a)

The flash point measures the tendency of the oil to form a

flammable mixture with air under controlled laboratory conditions.

The flash point is the lowest liquid temperature at which application of the test

flame causes the vapors of the test specimen of the sample to ignite.

Flash point can indicate the possible presence of

highly volatile and flammable materials.

For example, an abnormally low flash point on an

engine oil can indicate gasoline contamination.



CETRIB

Open Cup – Cleveland Method

Jorge H O Seabra,



Lubricant analysis

Particle Counting (ISO 4406:99, NAS 1638, SAE AS 4059) Oil cleanliness, using particle counting, is an important tool to extend either, the lubricant and equipment service life.

Determines the number and size-distribution of the particles in an oil sample:

Particle Counter (PAMAS SBSS)



CETRIB

Jorge H O Seabra,



Lubricant analysis

Ferrography Ferrography is a rapidly expanding technology of wear particle

analysis:

� It is a diagnostic and predictive technique;

� Offers a convenient means of accurately evaluating the condition of

interacting lubricated components without shutdown.

Types of Ferrography tests:

Direct Reading Ferrograph (DRIII) and Analytical Ferrograph (FM III)

When DR Ferrography reveals a pronounced increase in the particle density and

severity of wear index, an Analytical Ferrogram should be made to determine

specifically what type of wear is occurring and to provide the basis from which a

decision can be made whether to overhaul or continue operation.



CETRIB

Jorge H O Seabra,



Lubricant analysis

Direct Reading Ferrograph (DRIII) The Direct Reading Ferrograph measures quantitatively

the concentration of ferrous particles

contained in a lubricant sample.

� The DR Ferrograph magnetically precipitates

the wear particles from a sample;

� Provides digital readings of the quantity of

both large (> 5 µm) and small (< 5µm) particles;

� These numerical readings and their relative

values provide a reliable basis for assessing the degree of wear occurring in

a machine.



CETRIB

Jorge H O Seabra,



Lubricant analysis

Analytical Ferrography (FM III) The Analytical Ferrograph is used to prepare a Ferrogram – a fixed slide of wear particles for microscopic examination and photographic documentation. Wear particles suspended in an oil sample are magnetically precipitated into a thin glass slide, or Ferrogram. The microscopic analysis of the Ferrogram provides a qualitative basis for evaluating and visually recording the machine wear history. It also provides specific identification of wear mechanisms and individual parts producing patterns of incipient or catastrophic failure.



CETRIB

Jorge H O Seabra,



Lubricant analysis

Millipore Membrane Filtration

Membrane Filtration is used as an analytical toll for collecting,

identifying and measure particles in lubricating oils.

� A representative sample of oil

passes through a Millipore filter disc.

� Particulate matter that exceeds the membrane

pore size will be retained on the surface.

� The contaminants are analyzed.

Two simple test procedures for particulate contamination:

� Particle Counting – a quantitative method for determining contamination

levels by particle counting using microscopy;

� Gravimetric – a quantitative method for determining contamination level

by weight.



CETRIB

Jorge H O Seabra,



Lubricant analysis

Dialysis Method (Soap and Mineral Oil Fraction in Lubricating Greases – DIN 51 814)

Quantify the fraction of mineral oil and soap in lubricating greases. � As the grease reaches the end of its useful life,

the percentage of retained oil decreases considerably.

� Grease loses oil due to the combined action of

bleeding, oxidation and evaporation.

� When half of the initial oil content in the grease structure is

lost the grease is considered to be in the end of its useful

life (approximately).



CETRIB

Jorge H O Seabra,



Lubricant analysis

OilView (CSI Model 5100) Measures changes in oil quality, indicating the presence of

contamination or a chemical modification.

The results are expressed by quantitative indices:

� OilLife Index (lubricant total degradation)

� Chemical Index (chemical deterioration)

� Contaminant Index (water, insoluble, …)

� Ferrous Index

and qualitative parameters:

� Large Contaminants

� Large Ferrous Particles

� Large Nonferrous Particles

� Fluid Droplets -free water

OILVIEW (CSI 5100)



CETRIB

Jorge H O Seabra,



Metrology Laboratory

Roughness and Profile Measuring Device

(HOMMELWERKE Device Model PM 2000 / T 4000)

� Surface roughness measurement, in accordance with DIN and ISO standards.

� Surface topography and 3D roughness parameters

� Profile measurement (max. height - 40 mm; max. length - 150 mm).

Double-flank Rolling Gear Tester (HOMMELWERKE Tester Z 2000)

� Measurement of double-flank radial composite error.

� Measurement of centre distance deviation.

� Gear quality is assessed by accurate measurement of the radial composite

error, of the radial tooth-to-tooth composite error and of the working radial

run-out (according to DIN 3960 / AGMA 390.09).



CETRIB

Jorge H O Seabra,



Reference R&D projects

Financed by Industrial companies Projecto : Adaptor for rolling bearing tests in the Four-Ball machine

Instituições : INEGI e SKF-ERC (Netherlands). Período : Dezembro de 2010 a Julho de 2011. Em curso. Projecto : High performance gear oils for windmill applications

Instituições : INEGI (Portugal) e REPSOLYPF (Spain). Período : Novembro de 2008 a Janeiro de 2010. Projecto : Influence of additivation on gear micropitting.

Instituições : INEGI (Portugal) e REPSOLYPF (Spain). Período : Setembro de 2007 a Julho de 2008.



CETRIB

Jorge H O Seabra,




Financed by Industrial companies Projecto : PD Gear Oils (EIGO8). Instituições : INEGI (Portugal) e FUCHS (Germany). Período : Abril de 2006 a Março de 2007. Projecto : SIMCable – Simulação Mecânica de Actuadores por Cabo para a

Indústria Automóvel. Instituições : INEGI (P) e FICOcables (Portugal). Período : Fevereiro de 2005 a Dezembro de 2009. Projecto : Simulation pratique et théorique du comportement mécanique de

dents d'engrenages et la caractérisation et suivi des conditions d'apparition de fatigue de surface.

Instituições : INEGI e RENAULT (Technocentre, France) Período : Fevereiro de 2005 a Dezembro de 2009.



CETRIB

Jorge H O Seabra,




Financed by Industrial companies Projecto : Portable Auxiliary Positioning System – PAPS. Instituições : INEGI, A. BRITO e CERN (CH). Período : Setembro de 1997 a Dezembro de 1998. Projecto : Análise da capacidade de carga à gripagem dos lubrificantes da

linha "GALP Transgear". Instituições : INEGI e Petrogal, SA. Período : Setembro de 1994 a Março de 1996. Projecto : Comportamento do óleo MOBIL Jet II no interior de um contacto

EHD. Instituições : INEGI e MOBIL OIL Portuguesa. Período : Janeiro de 1990 a Dezembro de 1991.



CETRIB

Jorge H O Seabra,




Financed by the European Union Projecto : BIOMON – Towards long-life bio-lubricants using advanced design and

monitoring tools. Instituições : ROWE Mineralolwerk (D), Shuton (E), A. BRITO (P), FERSA SA (E), MONITON

(UK), TEKNIKER (E) e INEGI (P). Período : Outubro de 2004 a Dezembro de 2006

Projecto : EREBIO – Emission reduction from engines and transmissions substituting

harmful additives in biolubricants by triboreactive materials. Instituições : TEKNIKER (E), FUCHS (D), BAM (D), FALEX (B), RENAULT (F), BRITO (P), CRSA

(F), TARABUSI (E), FERESPE (P), IAV (D), GUASCOR (E) e INEGI (P). Período : Junho de 2002 a Maio de 2006.



CETRIB

Jorge H O Seabra,




Projecto : Reduction of the fluid lubricant use in heavily loaded motion transmission systems through the application of self-lubricant coatings.

Instituições : Shuton (SP), Teer Coating (UK), A. Brito (P), Ralpe (SP), Tekniker (SP), INEGI (P). Período : Outubro de 1998 a Setembro de 2000.

Projecto : ELABOMM - Endurance Limit of Actual Bearings depending on Operating conditions, Materials and Manufacturing.

Instituições : TURBOMECA (F), Hispano-Suiza (F), Renault (F), SNECMA (F),

SNR (F), Rolls Royce (UK), BMW/Rolls Royce (ex KHD, G), FAG (G), MTU (G),

INSA de Lyon (F), Instituto de Engenharia Mecânica (IDMEC - P). Período : Janeiro de 1993 a Dezembro de 1996.

Projecto : Bearing with minimum lubrication. Instituições : TURBOMECA (F), Hispano-Suiza (F), SNECMA (F), GLCS (F), Rolls Royce (UK),

BMW/Rolls Royce (ex KHD, G), MTU (G), INSA de Lyon (F), Leeds University

(UK), Fundação Gomes Teixeira da UP (P). Período : Fevereiro de 1990 a Março de 1993.



CETRIB

Jorge H O Seabra,




Financed by “Fundação para a Ciência e Tecnologia” Projecto : High efficiency gears and oils for wind mill planetary gearboxes Instituições : INEGI (P). Período : Junho de 2010 a Maio de 2013. Em curso.

Projecto : Low power loss austempered ductile iron gears Instituições : INEGI (P). Período : Julho de 2007 a Dezembro de 2010.

Projecto : Low friction, biodegradable and low toxivity greases for rolling bearings. Instituições : INEGI (P). Período : Julho de 2007 a Dezembro de 2010.

Projecto : Contact Fatigue model for gear micropitting prediction. Instituições : INEGI (P). Período : Julho de 2007 a Dezembro de 2010.



CETRIB

Jorge H O Seabra,




Financed by “Fundação para a Ciência e Tecnologia” Projecto : GEARSCUFF - Gear Scuffing – New Experimental and Numerical Models. Instituições : INEGI (P). Período : Janeiro de 2001 a Dezembro de 2003. Projecto : FARIA - Desenvolvimento de protótipos de engrenagens e juntas

homocinéticas para a indústria automóvel em ADI. Instituições : A. Brito, Ferespe, FEUP (DEMET) e INEGI. Período : Março de 1999 a Junho de 2001. Projecto : SEM XXI - Sistema de Exploração e Manutenção do Metro do Porto Instituições : ADTranz, EFACEC, MIIT, INETI, IST, FEUP, INEGI, EST-IPS. Período : Fevereiro de 1999 a Junho de 2001.



CETRIB

Jorge H O Seabra,




Financed by “Fundação para a Ciência e Tecnologia” Projecto : Tratamentos térmicos específicos de um ADI

visando a melhoria do desempenho de engrenagens. Instituições : INEGI, FEUP (DEMET) e CEMUP. Período : Outubro de 1997 a Setembro de 2000. Projecto : Análise Dinâmica de Transmissões Mecânicas Complexas. Instituições : A. BRITO, Indústria Portuguesa de Engrenagens, Lda e INEGI. Período : Abril de 1993 a Dezembro de 1995. Projecto : Lubrificação termoelastohidrodinâmica rugosa -

Previsão de avarias de fadiga e gripagem em engrenagens. Instituições : INEGI. Período : Dezembro de 1992 a Novembro de 1995.



CETRIB

Jorge H O Seabra,



Failure Analysis

2008 - 2010

Fractura por fadiga de duas válvulas de um motor de combustão interna. RIG Inc. – International Loss Adjusters. Relatório INEGI-CETRIB (TR01-08-AA), Porto, Abril de 2008, 7 páginas.

Análise sucinta do empeno de duas válvulas de um motor. Rig Inc. – International Loss Adjusters. Relatório INEGI-CETRIB (TR03-08-AA), Porto, Setembro de 2008, 5 páginas.

Análise comparativa de desempenho tribológico de 3 materiais compósitos para chumaceiras secas de baixa velocidade. MARTIFER, Energy systems. Relatório INEGI-CETRIB, Porto, Maio de 2008, 13 páginas.

Fractura de um tubo flexível de alimentação de água: Observação da superfície cilíndrica lateral e da superfície de fractura RTS Portugal – International Loss Adjusters, Porto. Relatório INEGI/CETRIB TR01-10-AA, Porto, Fevereiro 2010, 4 páginas.

Análise de avaria de um rolamento autocompensador de rolos de um Trem de Secagem de Papel. MIIT, Lisboa. Relatório INEGI/CETRIB, Porto, Setembro 2010, 4 páginas.

Análise de avaria de três rolamentos cónicos de um Trem de Secagem de Papel. MIIT, Lisboa. Relatório INEGI/CETRIB, Porto, Novembro 2010, 6 páginas.



CETRIB

Jorge H O Seabra,



Lubricant Analysis - 2010 - 2011

Análise de Ferrografia e Viscosimetria de um óleo lubrificante BP TURBINOL X46 da Turbina a Vapor – TG4. PORTUCEL Cacia, Cacia. Relatório INEGI/CETRIB, Porto, Janeiro 2010, 8 páginas.

Análise de FTIR e Viscosimetria de Engler a um óleo sintético 5W40 do motor Diesel de um Mercedez Sprenter 416 CDI. REISAUTO do OESTE, LDA. Relatório INEGI/CETRIB, Porto, Fevereiro 2010, 10 páginas.

Análise de Desgaste III de um óleo lubrificante BP TURBINOL X46 da Turbina a Vapor – TG4. PORTUCEL Cacia, Cacia. Relatório INEGI/CETRIB, Porto, Março 2010, 9 páginas.

Determinação do Teor de Água em oito amostras de óleo lubrificante provenientes de caixas de engrenagens de Bogies. BOMBARDIER, Porto. Relatório INEGI/CETRIB, Porto, Maio 2010, 3 páginas.

Análise de Desgaste II de um óleo lubrificante BP TURBINOL X46 da Turbina a Vapor – TG4. PORTUCEL Cacia, Cacia. Relatório INEGI/CETRIB, Porto, Junho 2010, 7 páginas.

Análise de Ferrografia a um óleo lubrificante ENERGOL LPT 100 proveniente de um compressor de amoníaco (J2851A). LBC Tanquipor, Lisboa. Relatório INEGI/CETRIB, Porto, Julho 2010, 8 páginas.



CETRIB

Jorge H O Seabra,




Análise de Ferrografia a um óleo lubrificante ENERGOL LPT 100 proveniente de um compressor de amoníaco (J2851B). LBC Tanquipor, Lisboa. Relatório INEGI/CETRIB, Porto, Agosto 2010, 5 páginas.

Análise de Ferrografia a um óleo lubrificante GALP TURBINOIL 46 proveniente de um compressor HNO3. MIIT, Lisboa. Relatório INEGI/CETRIB, Porto, Agosto 2010, 9 páginas.

Análise de Ferrografia a um óleo lubrificante BP ENERGOL RC 100 proveniente de um compressor H2. MIIT, Lisboa. Relatório INEGI/CETRIB, Porto, Agosto 2010, 9 páginas.

Análise de Desgaste II de um óleo lubrificante BP TURBINOL X46 da Turbina a Vapor – TG4. PORTUCEL Cacia, Cacia. Relatório INEGI/CETRIB, Porto, Outubro 2010, 8 páginas.

Análise de Desgaste II de um óleo lubrificante BP TURBINOL X46 da Turbina a Vapor – TG4. PORTUCEL Cacia, Cacia. Relatório INEGI/CETRIB, Porto, Novembro 2010, 8 páginas.

Análise de Ferrografia e Análise Visual de um óleo Diesel Mobil 1 5W40 de um veículo Citroen C5. Sr. Jorge Ferreira, Porto. Relatório INEGI/CETRIB, Porto, Janeiro 2011, 8 páginas.

Análise de Desgaste II de um óleo lubrificante BP TURBINOL X46 da Turbina a Vapor – TG4. PORTUCEL Cacia, Cacia. Relatório INEGI/CETRIB, Porto, Fevereiro 2011, 7 páginas.



CETRIB

Jorge H O Seabra,




Análise de Ferrografia a um óleo lubrificante BP ENERGOL RC 100 proveniente de um compressor H2. MIIT, Lisboa. Relatório INEGI/CETRIB, Porto, Abril 2011, 9 páginas.

Análise de Ferrografia a um óleo lubrificante SHELL TURBO OIL 46 proveniente de um compressor HNO3. MIIT, Lisboa. Relatório INEGI/CETRIB, Porto, Abril 2011, 9 páginas.



CETRIB

Jorge H O Seabra,



Publications in International Scientific Journals

2008 - 2011 1. R. Martins, J. Seabra, L. Magalhães, “Austempered ductile iron (ADI) gears: Power loss, pitting

and micropitting”. WEAR, vol. 264, 2008, 838-849.

2. R. Martins, R. Amaro and J. Seabra, “Influence of low friction coatings on the scuffing load capacity and efficiency of

gears”. Tribology International, Vol. 41/4 (2008), pp. 234-243.

3. J. Castro e J. Seabra, “Global and local analysis of gear scuffing tests using a mixed film lubrication model”. Tribology

International, Vol. 41/4 (2008), pp. 244-255.

4. R. C. Martins N. F. R. Cardoso e J. H. O. Seabra, “Gear power loss performance of biodegradable low-toxicity ester

based oils”. Proc. Instn of Mech. Engrs, Part J: Journal of Engeneering Tribology, 2008, 222 (J3): 431-440.

5. R. Martins and J. Seabra, “Micropitting performance of mineral and biodegradable ester gear oils”. Industrial

Lubrication and Tribology, Vol. 60, Nº6, 2008, pp. 286-292.

6. R. Martins, N. Cardoso and J. Seabra, “Influence of lubricant type in gear scuffing”. Industrial Lubrication and

Tribology, Vol. 60, Nº6, 2008, pp. 299-308.

7. E. Ciulli, L.A. Ferreira, G. Pugliese, S.M.O. Tavares, “Rough Contacts Between Actual Engineering Surfaces - Part I:

Simple Models for Roughness Description”, Wear, Vol. 264, 2008, pp. 1105-1115.

8. G. Pugliese, S.M.O. Tavares, E. Ciulli, L. A. Ferreira, “Rough Contacts Between Actual Engineering Surfaces – Part II:

Contact Mechanics”, Wear, Vol. 264, 2008, pp. 1116-1128.

9. V.M.M.B. da Mota, P.M.G.P. Moreira, L.A.A. Ferreira, “A study on the effects of dented surfaces on rolling contact

fatigue”, International Journal of Fatigue, Vol. 30, 2008, pp 1997-2008.

10. R.P. Martinho, F.J.G. Silva, A.P.M. Baptista, “Cutting forces and Wear analysis of Si3N4 diamond coated tools in high

speed machining”, Vacuum 82 (2008) 1415–1420.



CETRIB

Jorge H O Seabra,




2008 - 2011

11. A.M. Guedes Pinto, A.G. Magalhães, F. Gomes da Silva, A.P. Monteiro Baptista, “Shear strength

of adhesively bonded polyolefins with minimal surface preparation”, International Journal of

Adhesion & Adhesives 28 (2008) 452– 456

12. A. M. G. Pinto, A. G. Magalhães, F. Gomes da Silva, A. P. Monteiro Baptista,“Acrylic adhesives in the polyolefins

joining”, ‘Materials Science Forum, Vol. 587-588, (2008) pp 577-581

13. Luis M. P. Durão, A. G. Magalhães, A. T. Marques, A. M. Baptista, M. Figueiredo,“Drilling of fiber reinforced plastic

laminates”, ‘Materials Science Forum, Vol. 587-588, (2008) pp 706-710

14. A.Aguiar Vieira, A. Monteiro Baptista, M. P. Lages Parente, R. M. Natal Jorge,“On the temperature field during

superficial grinding: an experimental study”, Int J Adv Manuf Technol (DOI 10.1007/s00170-008-1442-4), Springer,

Published online: 5 April 2008

15. Vasques, C. M. A. and Dias Rodrigues, J., “Combined feedback/feedforward active control of vibration of beams with

ACLD treatments: Numerical simulation”. Computers and Structures, 86(3-5):292-306, 2008.

16. Vasques, C. M. A. and Dias Rodrigues, J., “Numerical and Experimental Comparison of the Adaptive Feedforward

Control of Vibration of a Beam with Hybrid Active-Passive Damping Treatments”. Journal of Intelligent Material

Systems and Structures, 19(7):805-813, 2008.

17. A.J.M. Ferreira, G.E. Fasshauer, R.C. Batra, J.D. Rodrigues, “Static deformations and vibration analysis of composite

and sandwich plates using a layerwise theory and RBF-PS discretizations with optimal shape parameter”, Composite

Structures, 86:328-343, 2008

18. A.M.G. Pinto, A.G. Magalhães, R.D.S.G. Campilho, M.F.S.F. de Moura, A.P.M. Baptista, “Single-lap joints of similar and

dissimilar adherends bonded with an acrylic adhesive”. Journal of Adhesion, Jun 2009, Vol. 85 Issue 6, p351-376, 26p;

DOI: 10.1080/00218460902880313 (AN 39768856).



CETRIB

Jorge H O Seabra,




2008 - 2011

19. M. F. C. Andrade, R. P. Martinho, F. J. G. Silva, R. J. D. Alexandre, A. M. Baptista, “Influence of the

abrasive particles size in the micro-abrasion wear tests of TiAlSiN thin coatings”, Wear 267 (2009)

12-18.

20. R. P. Martinho, M. F. C. Andrade, F. J. G. Silva, R. J. D. Alexandre, A. M. Baptista, “Micro-abrasion wear behaviour of

TiAlCrSiN nanostructured coatings”. Wear, 267 (2009) 1160-1165.

21. A. Aguiar Vieira, A. Monteiro Baptista, M. P. Lages Parente, R. M. Natal Jorge, “On the temperature field during

superficial grinding: an experimental study”. Int. J. Adv Manuf. Technol. (2009) 40:1084-1092.

22. F. G. Silva, M. A. Neto, A. J. S. Fernandes, F. M. Costa, F. J. Oliveira and R. Silva, “Adhesion and wear behaviour of NCD

coatings on Si3N4 by micro-abrasion tests”. Journal of Nanoscience and Nanotechnology, Vol. 9,3938 - 3943, 2009.

23. Nuno F.R. Cardoso, Ramiro C. Martins and Jorge H.O. Seabra, “Micropitting of carburized gears lubricated with

biodegradable low-toxicity oils”. Proc. Instn of Mech. Engrs, Vol. 223, Nº J3, Part J, Journal of Engeneering Tribology,

481-495, May, 2009, doi:10.1243/13506501.JET495.

24. N.F.R. Cardoso, R.C. Martins, J.H.O. Seabra, A. Igartua, X. Fdez-Pérez and R. Luther, “Micropitting performance of

nitriding steel gears lubricated with mineral and ester oils”. Tribology International, Vol. 42/1 (2009), pp. 77-87,

doi:10.1016/j.triboint.2008.05.010.

25. R. C. Martins, N. F. R. Cardoso, H. Bock, A. Igartua, J. H. O. Seabra, “Power loss performance of high pressure nitrided

steel gears”. Tribology International, Vol. 42 (2009), pp. 1807-1815, doi:10.1016/j.triboint.2009.03.006.

26. L. Ferreira, F. Didelet Pereira, “Proportional Hazards Method: Location and Procedures”, Buletinul Universitatii Petrol

– Gaze din Ploiesti, Seria Tehnica, vol. LX, nº3ª/2009, pp143-150



CETRIB

Jorge H O Seabra,




2008 - 2011

27. R.A.S. Moreira and J. Dias Rodrigues, “Static and dynamic analysis of soft core sandwich panels

with through-thickness deformation”, Journal of Composite Structures (2009),

doi:10.1016/j.compstruct.2009.07.015

28. R.A.S. Moreira and J. Dias Rodrigues, “Multilayer damping treatments: modeling and experimental assessment”,

Journal of Sandwich Structures and Materials OnlineFirst, published on June 12, 2009 as

doi:10.1177/1099636209104530

29. J. Santos Silva, R.A.S. Moreira and J. Dias Rodrigues, “Application of cork compounds in sandwich structures for

vibration damping”, Journal of Sandwich Structures and Materials OnlineFirst, published on June 24, 2009 as

doi:10.1177/1099636209104538

30. Tiago Cousseau, Beatriz Graça, Armando Campos, Jorge Seabra, “Influence of grease formulation on thrust bearings

power loss”. Proceedings of the. Instn of Mech. Engrs, Part J, Journal of Engeneering Tribology, 2010, Vol. 224, Nº J9,

935-946. Doi: 10.1243/13506501JET724.

31. Tiago Cousseau, Beatriz Graça, Armando Campos, Jorge Seabra, “Experimental measuring procedure for the friction

torque in rolling bearings”. Lubrication Science (Ref. LS-09-0029-LS), 2010, Vol22:133-147. doi: 10.1002/ls.115

32. Luís M L Magalhães, Ramiro C Martins, Cristiano Locatelli, Jorge H O Seabra, “Influence of tooth profil and oil

formulation on gear power loss”. Tribology International (JTRI_2095), Vol. 43/10 (2010), pp. 1861-1871.

doi:10.1016/j.triboint.2009.10.001

33. José Brandão, Jorge H.O. Seabra and Jorge Castro, “Surface initiated tooth flank damage. Part II: Prediction of

micropitting and mass loss”. WEAR, vol. 268 (1-2), 2010, 13-22. doi:10.1016/j.wear.2009.07.020.



CETRIB

Jorge H O Seabra,




2008 - 2011

34. José Brandão, Jorge H.O. Seabra and Jorge Castro, “Surface initiated tooth flank damage. Part I:

Numerical Model”. WEAR, vol. 268 (1-2), 2010, 1-12. doi:10.1016/j.wear.2009.06.020

35. C. M. A. Vasques, R. A. S. Moreira and J. Dias Rodrigues, “Viscoelastic Damping Technologies−−−−Part I: Modeling and

Finite Element Implementation”. Journal of Advanced Research in Mechanical Engineering, 1(2): 76-95, 2010.

36. C. M. A. Vasques, R. A. S. Moreira and J. Dias Rodrigues, “Viscoelastic Damping Technologies−−−−Part II: Experimental

Identification Procedure and Validation”. Journal of Advanced Research in Mechanical Engineering, 1(2): 96-110,

2010.

37. R.A.S. Moreira, J.D. Corte-Real and J. Dias Rodrigues, A generalized frequency-temperature viscoelastic model,

Journal of Shock and Vibration, 17:407-418, 2010

38. R.A.S. Moreira, F.J.Q. de Melo, J. Dias Rodrigues, Static and Dynamic Characterization of Cork Compounds for

Sandwich Beam Cores, Journal of Materials Science, 45:3350-3366, 2010

39. R.A.S. Moreira and J. Dias Rodrigues, Static and dynamic analysis of soft core sandwich panels with through-thickness

deformation, Journal of Composite Structures, 92(2):201-215, 2010

40. R.A.S. Moreira and J. Dias Rodrigues, Multilayer damping treatments: modeling and experimental assessment, Journal

of Sandwich Structures and Materials, 12:181-198, 2010

41. J. Santos Silva, R.A.S. Moreira and J. Dias Rodrigues, Application of cork compounds in sandwich structures for

vibration damping, Journal of Sandwich Structures and Materials, 12:495-515, 2010

42. M.C.S. Ribeiro, L.F.P. Juvandes, J.D. Rodrigues, A.J.M. Ferreira and A.T. Marques, Behaviour of Cement and Polymer

Mortar Materials to Rapid Freeze-Thaw Cycling, Materials Science Forum Vols. 636-637 (2010), pp 1329-1335, Trans

Tech Publications.



CETRIB

Jorge H O Seabra,




2008 - 2011

43. L. M. P. Durão, D.J.S.Gonçalves, J.M.R.S.Tavares, V.H.C. Albuquerque, A.T.Marques and A. M.

Baptista, “Drilling of carbon fibre reinforced laminates- a comparative analysis of five different

drills on thrust force, roughness and delamination”, Materials Science Forum Vols. 636-637 (2010) pp 206-213, ©

(2010) Trans Tech Publications, Switzerland, doi:10.4028/www.scientific.net/MSF.636-637.206

44. A. M. G. Pinto, A. G. Magalhães, R. D. S. G. Campilho, M. F. S. F. de Moura, A. P. M. Baptista, “Strength prediction and

experimental validation of adhesive joints including polyethylene, carbon-epoxy and aluminium adherends”,

Materials Science Forum Vols. 636-637 (2010) pp 1157-1164, © (2010) Trans Tech Publications, Switzerland,

doi:10.4028/www.scientific.net/MSF.636-637.1157

45. A.M.G. Pinto, A.G. Magalhães, R.D.S.G. Campilho, L.F.M. da Silva, J.A.G. Chousal, A.P.M. Baptista, “Shear modulus and

strength of an acrylic adhesive with the notched plate shear method (ARCAN) and the thick adherend shear test

(TAST)”, Materials Science Forum Vols. 636-637 (2010) pp 787-792, © (2010) Trans Tech Publications, Switzerland,

doi:10.4028/www.scientific.net/MSF.636-637.787

46. Campilho RDSG, de Moura MFSF, Pinto AMG, Ramantani DA. Interlaminar fracture characterization of a carbon-epoxy

composite in pure mode II. Materials Science Forum, 2010, 636-637: p. 1518-1524.

47. Campilho RDSG, de Moura MFSF, Pinto AMG, Ramantani DA, Morais JJL, Domingues JJMS. Strength prediction of

adhesively-bonded scarf repairs in composite structures under bending. Materials Science Forum, 2010, 636-637: p.

233-238.

48. Pinto AMG, Campilho RDSG, de Moura MFSF, Mendes IR. Numerical evaluation of three-dimensional scarf repairs in

carbon-epoxy structures. International Journal of Adhesion & Adhesives, 2010, 30: p. 329–337.



CETRIB

Jorge H O Seabra,




2008 - 2011

49. D.F.C. Peixoto, L.A.A. Ferreira, P.M.S.T. de Castro, “Application of the Dang Van Fatigue Criterion

to the Rail/Wheel Contact Problem”, Materials Science Forum Vols. 636-637 (2010) pp 1178-

1185, doi:10.4028/www.scientific.net/MSF.636-637.1178.

50. Tiago Cousseau, Beatriz Graça, Armando Campos, Jorge Seabra, “Friction torque in grease lubricated thrust ball

bearings”. Tribology International, (TRIBINT-D-09-00291R1, JTRI 2295), Vol. 44/10 (2011), pp. 523-531.

doi:10.1016/j.triboint.2010.06.013. 51. Ramiro C. Martins, Cristiano Locatelli, Jorge H. O. Seabra, Jorge M. D. Castro, “Evolution of tooth flank roughness

during gear micropitting tests”. Industrial Lubrication and Tribology, Volume 63, Nº 1, 2011, 34-45 (Ref. ILT-10-2009-

0055), doi:10.1108/00368791111101821. 52. Luís M L Magalhães, Ramiro C Martins, Cristiano Locatelli, Jorge H O Seabra, “Influence of tooth profil on gear power

loss”. Industrial Lubrication and Tribology, Volume 63, Nº 1, 2011, 27-33 (Ref. ILT-10-2009-0057),

doi:10.1108/00368791111101812.

53. José A. Brandão, Mathilde Meheux, Jorge H. O. Seabra, Fabrice Ville, Manuel J. D. Castro, “Traction curves and

rheological parameters of fully formulated gear oils”. Proceedings of the Instn. of Mech. Engrs, Part J: Journal of

Engeneering Tribology - JET-S-10-00184 Março de 2011. doi:10.1177/1350650111405111. In press.

54. Ramiro C. Martins, Jorge H. O. Seabra, Luís F. Ruíz-Moron, “Influence of oil formulation on gear micropitting and

power loss performance”. Proceedings of the Instn. of Mech. Engrs, Part J: Journal of Engeneering Tribology (JET-S-10-

00132, JET874) em Julho de 2010. doi:10.1177/1350650110397260. In press.

55. Tiago Cousseau, Beatriz Graça, Armando Campos, Jorge Seabra, “Friction and wear in thrust ball bearings lubricated

with biodegradable greases”. Proceedings of the Instn. of Mech. Engrs, Part J: Journal of Engeneering Tribology (ref

JET-S-10-00181 - JTRI491R1) Novembro de 2010. doi:10.1177/1350650110397261. In press.



CETRIB

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