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contact mechanics

Surface Energies? Continuum Molecular Dynamics?

Submitted by Mike Graham on
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molecular dynamics
contact
contact mechanics
continuum molecular dynamics
Lennard-Jones
van der Waals force

I recently encountered the research of Phil Attard and others, in which the contact problem is solved, relaxing the restrictions of the traditional contact models (Hertz, JKR, DMT) and solving based on a formulation where the governing equations are derived using finite-range surface forces and calculated numerically, self-consistently.

Max penetration error in ABAQUS

Submitted by spawaskar on
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penetration
computational mechanics
contact mechanics

I am doing contact simulation of soft material. I want to change the default criterion for max penetration error, but can't seem to find how to do it. I tried contact controls relative and absolute penetration tolerances, hcrit but that did not affect the error criterion. Can someone help me please?

a couple of recently published papers in contact mechanics -- roughness and dynamic rolling

Submitted by Mike Ciavarella on
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rough surfaces
contact mechanics
dynamic rolling contact

For those interested in a classical subject like contact mechanics, here are a couple of recent papers published in August.  One is an extension of the Greenwood Williamson theory of rough contact, and the other is a linear perturbation solution of the classical Carter rolling contact problem for a rolling cylinder, when the surface is corrugated and hence there are oscillations in both normal and tangential loads.

ADVANCES IN CONTACT MECHANICS : A TRIBUTE TO JJ KALKER DELFT 22/24 OCTOBER

Submitted by Mike Ciavarella on
conference
rolling contact
contact mechanics
delft
JJ Kalker

 


http://www.contactmechanics.org/


Delft 22 - 24 October




Chairmen:    


Tom Scarpas     Delft University of Technology, The Netherlands


Patrick Selvadurai     McGill University, Canada

Rail corrugation: ”one hundred years of solitude”? or a true enigma?

Submitted by Mike Ciavarella on
research
contact mechanics
Ken Johnson
rail corrugation

You may remember that I promised some time ago to discuss each of the topics mentioned by Ken Johnson in his Timoshenko Medal speach. Here I take rail corrugation. Rail corrugation has been noticed at least for 100 years, but (particularly short pitch one in the range 20÷80 mm) has been considered an enigma because measured corrugation wavelength did not relate well with wear instabilitymodels.

Predictive modeling schemes for wear in tribometers

Submitted by vh on
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Contact Mechanics Forum
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friction
finite element
contact mechanics
Wear modeling
Wear simulation
Archard wear

Study of wear in complex micro-mechanical components is often accomplished experimentally using a pin-

on-disc and twin-disc tribometer. The present paper proposes an approach that involves a computationally

efficient incremental implementation of Archard’s wear model on the global scale for modeling sliding and

slipping wear in such experiments. It will be shown that this fast simplistic numerical tool can be used to

identify the wear coefficient from pin-on-disc experimental data and also predict the wear depths within a

Adhesion in viscoelastic contacts

Submitted by MichelleLOyen on
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adhesion
contact mechanics
JKR
Ken Johnson

Yesterday I had the distinct pleasure of seeing a mechanics seminar delivered "tag-team" by Ken Johnson and Jim Greenwood. (I know several people have thought I was a bit mad for jumping "across the pond" but there are really some amazing benefits of being part of the Cambridge Engineering faculty!)

clever load normalization parameters for hip joint prosthesis

Submitted by Mike Ciavarella on
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hip joint
contact mechanics
receding contact

A normalising loading parameter useful in summarising the mechanical response of plane, pin in plate-like contacts is extended to axisymmetric, ball in socket-like contacts. Various diagrams reporting

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