Influence of crystal anisotropy on elastic deformation and onset of plasticity in nanoindentation -- a simulational study

By Gerolf Ziegenhain, Herbert M. Urbassek, A. Hartmaier. 2008

151 citations recorded by the source corpus.

Using molecular-dynamics simulation we simulate nanoindentation into the three principal surfaces—the (100), (110), and (111) surface—of Cu and Al. In the elastic regime, the simulation data agree fairly well with the linear elastic theory of indentation into an elastically anisotropic substrate. With increasing indentation depth, the effect of pressure hardening becomes visible. When the critical stress for dislocation nucleation is reached, even the elastically isotropic Al shows a strong dependence of the force-displacement curves on the surface orientation. After the load drop, when plasticity has set in, the influence of the surface orientation is lost, and the contact pressure (hardness) becomes independent of the surface orientation.

Subfields: Materials Chemistry, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/fe477d1cbe10dbf397cce667d261e275eb88247e

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In Materials Chemistry

1. Douglas E. Spearot
2. James A. Stewart
3. David L. McDowell

In Mechanics of Materials

1. Douglas E. Spearot
2. James A. Stewart

Citations in the corpus

• Atomistic simulations of nanoindentation on the basal plane of crystalline molybdenum disulfide (MoS2) (2013, background): “However, since MoS2 is anisotropic and no analytical solution exists for contact in such systems [47, 48], no attempt is made in this work to compare the nanoindentation results to the existing numerical approximations of Hertzian contact in anisotropic solids.”