Finite element modeling of elasto-plastic contact between rough surfaces

By L. Pei, S. Hyun, Jean-François Molinari, M. Robbins. 2005

382 citations recorded by the source corpus.

This paper presents a finite element calculation of frictionless, non-adhesive, contact between a rigid plane and an clasto-plastic solid with a self-affine fractal surface. The calculations are conducted within an explicit dynamic Lagrangian framework. The elastoplastic response of the material is described by a J(2) isotropic plasticity law. Parametric studies are used to establish general relations between contact properties and key material parameters. In all cases, the contact area A rises linearly with the applied load. The rate of increase grows as the yield stress sigma(y) decreases, scaling as a power of sigma(y) over the range typical of real materials. Results for A from different plasticity laws and surface morphologies can all be described by a simple scaling formula. Plasticity produces qualitative changes in the distributions of local pressures in the contact and of the size of connected contact regions. The probability of large local pressures is decreased, while large clusters become more likely. Loading-unloading cycles are considered and the total plastic work is found to be nearly constant over a wide range of yield stresses. (c) 2005 Elsevier Ltd. All rights reserved.

Subfields: Atomic and Molecular Physics, and Optics, Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/962284d61f28cd9b7f3fb9d5874cad9d555671d7

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In Atomic and Molecular Physics, and Optics

In Mechanical Engineering

In Mechanics of Materials

Citations in the corpus

A Review of Elastic–Plastic Contact Mechanics (2017, background): “Pei et al. [211] used ﬁnite elements to investigate the elastic–plastic contact of self-afﬁne fractal surfaces.”
Interfacial separation between elastic solids with randomly rough surfaces: Comparison between theory and numerical techniques (2011, methodology): “Additionally, in the GW model the asperity contact regions are assumed to be circular (or elliptical) while the actual contact regions (at high enough experimental resolution) show fractal-like boundary lines (Borri-Brunetto et al., 2001; Pei et al., 2005; Persson & Yang, 2008).”