October 22 & 23, 2008
Hyatt Regency Hotel
Miami, Florida, USA

Organized by the Tribology Division of ASME
Who could attend? Graduate Students (Master and PhD candidates) registered as "Student Member" at IJTC2008 - limited to 30 participants
Course fees: free
Registration

An international doctoral school is proposed by the ASME Tribology Division. It will take place in Miami the evening of October 22 and October 23 the whole day following the IJTC2008 conference. This doctoral school is open to ASME and STLE student members. The objectives of this short international doctoral school is to exchange research experience among junior and senior researchers, and to have a brief overview of some recent developments in the field of contact mechanics, including experiments and modeling, and fluid and solid aspects. MSc and PhD candidates working in the field of Tribology will first participate to 3 short lectures on Contact Mechanics given by 3 international experts with different background. The students will also present and discuss their PhD research. The working language is English. The admission is free and limited to those that are registered to IJTC2008 as student member.

Objectives and content
The objectives of this short international doctoral school is to exchange research experience among junior and senior researchers, and to have a brief overview of some recent developments in the field of contact mechanics, including experiments and modeling and fluid and solid aspects. Each participant will give a short presentation to introduce his research subject and discuss the key points and difficulties encountered or forecasted. Fruitful discussions are expected.

Program

Wednesday 22, October 2008, 7pm-10pm
7-7.15pm Welcome and Presentation of the Doctoral Course

7.15-8.30pm Lecture 1 "Measuring Tribological contacts", Rob Dwyer-Joyce
In tribology the contacts are often very small, moving at high speed, and lubricated by only a very thin layer of oil. This means that the conventional metrology tools like micrometers, strain gauges, or load cells that engineers use to measure stress/strain and deflection are hard to use. In this lecture we will look at some methods that are available to measure what happens at the contact; how thick oil films are, and how much asperity contact takes place. The talk will briefly cover some of the presenter's work on using ultrasound as a metrology tool.

break
8.45-10pm Short presentation of student research (x5)

Thrusday 23, October 2008, 8am-noon & 1pm-5pm
8-9.15am Lecture 2 "Molecular simulation of Sliding Contacts", Ashlie Martini
Emerging small-scale engineering components have correspondingly smaller moving interfaces. The tribological behavior of such interfaces can be significantly influenced by individual molecular movements and interactions. These effects are now frequently investigated using molecular dynamics (MD) simulation. This lecture presents an introduction to MD simulation for tribology research. The primary goals of the lecture are to provide students with (a) awareness of the opportunities and limitations of MD simulation for tribology, (b) understanding of the compromise between model complexity/realism and computational expense, and (c) background that enables interpretation of MD results reported in the literature.

9.15-10.15am Short presentation of student research (x4)

break
10.30-12am Short presentation of student research (x6)

lunch
1-2.15pm Lecture 3 "Plasticity in Contact Mechanics", Daniel Nélias
Very often what is called Hertzian contacts may undergo plasticity either at the scale of the contact due to accidental overload or at a smaller scale due to the presence of surface defect or roughness. Many analytical solutions exist for elastic problems, but almost none for elastic-plastic problems. Various numerical methods exist to tackle plasticity in contact problems, from limiting the contact pressure to a threshold value to the implementation of full constitutive laws in a FEM solver. Some classical elastic solutions for various contact problems will be first recalled. Different methods proposed to consider plasticity will be then reviewed. Finally the role of plasticity in contact problems will be highlighted and illustrated by several examples ranging from nano-indentation simulation to the rolling of a moving load, among others.

2.15-3.15pm Short presentation of student research (x4)

break 3.30-4.45pm Short presentation of student research (x5)

4.45-5pm Conclusion

Instructors
Rob Dwyer-Joyce, professor at the University of Sheffield, UK
Rob Dwyer-Joyce is Head of Department and Professor of Lubrication Engineering in the Department of Mechanical Engineering. He has a first degree in Mechanical Engineering from Imperial College and a PhD in Tribology. After graduating he worked for British Gas in the Petroleum Production Division and offshore on the Rough gas field. Rob joined the Department in 1994; he manages the Tribology group that specializes in industrial wear and lubrication problems, and the development of metrology tools for tribology. Rob teaches fluid mechanics and tribology of machine elements to undergraduate and postgraduate students. Rob is a member of the IMechE Tribology Group, STLE, and a board member of The IMechE Journal of Tribology and Lubrication Science.

Ashlie Martini, assistant professor at Purdue University, USA
Ashlie Martini obtained her PhD from Northwestern University in 2007 and is currently an assistant professor of Mechanical Engineering at Purdue University. Her research interests include simulation-based investigation of frictional behavior across a broad range of length and time scales.

Daniel Nélias, professor at INSA Lyon
Daniel Nélias received his engineer degree and M.Sc. in 1986, the D.Sc. in 1989, and his habilitation to lead research (HdR) in 1999, all in mechanical engineering from INSA Lyon, France. He began his professional career as research engineer with the Turbomeca Company in France (1986-89). He has been a post-doc at the University of California (Berkeley, 1991), and a guest researcher at the Mechanical Engineering Laboratory in Japan (Tsukuba, 1995) and Northwestern University (Evanston, 1998). In 2003 he was appointed Professor of Mechanical Engineering at INSA Lyon. He his the author or co-author of more than 35 refereed journal papers, primarily in the fields of Contact mechanics including thermal and plasticity effects, plasticity in rolling contact and indentation ; stick-slip and fretting wear simulation ; rolling contact fatigue including the effects of surface dents and subsurface inclusions ; modeling of rolling bearings and squeeze-films ; elastohydrodynamic lubrication ; numerical simulation of welding, and integrity of NEMS and aerospace structures. He is an active member of ASME and STLE.

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