|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P1-94: Effect of Virtual Spherical Indenter Stiffness on Atomistic Simulations of Nanoindentation
||Zhenhai Xu, Rui Xi, Debin Shan
|On-Site Speaker (Planned)
The atomistic simulation of nanoindentation is a well-established method to study mechanical characterization of small volumes of materials from the atomic view. The indenter is usually modelled as a virtual sphere without any atomic detail. The indenter stiffness k is often set by a compromise, inducing its diversity in different studies. In this work, nanoindentation simulations with different indenter parameters were performed on Cu(111) surfaces. Only when k is large enough, the critical load and critical depth for the initial dislocations emission become physical quantities to characterize the real response of indented materials to the nanoindentation. The reduced elastic modulus fitting to the load-nominal indentation depth curve is dependent on k and upper limit for fitting. The larger k cost larger computational time. A study with nanoindentation simulation should indicate value of k explicitly.