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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

Not just another pillar compression paper

Submitted by Yanfei Gao on
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We show that it is possible to distinguish between homogeneous and heterogeneous dislocation nucleation on the basis of differences in experimentally measured theoretical strengths. From nanoindentation tests, the critical shear stress for dislocation nucleation in two different Mo-alloy single crystals (Mo-3Nb and Mo-10Al-4Ni) is found to be ~1/8 of the shear modulus. The corresponding stress in uniaxially compressed Mo-10Al-4Ni micropillars is ~1/26 of the shear modulus.

2D orthogonal metal cutting problems in MSC-marc code

Submitted by kaslantas on
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Computational Mechanics Forum
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Hi everybody 

How do we use MSC-Marc finite element code to simulate the orthogonal metal cutting process? Is there anybody having example or tutorial about that?

best wishes

kubilay 

Prediction of arterial failure

Submitted by Konstantin Volokh on
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biomechanics; failure; artery

We enhanced a bi-layer fiber-matrix microstructural arterial model with softening and analyzed the artery inflation under the internal pressure. Numerical simulations lead to the following three findings. Firstly, it is found that the fiber strength dominates the strength of the media layer. Secondly, it is found that the strength of the media layer dominates the overall arterial strength and plays the crucial role in the load-bearing capacity of arteries. Thirdly, it is found that residual stresses can increase the overall arterial strength significantly. The pre-existing compression in arteries delays the onset of rupture like the pre-existing compression in the pre-stressed concrete delays the crack opening.

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