Accurate evaluations of strain and stress in atomistic simulations of crystalline solids

Jerry Zhijian Yang, Xiaojie Wu, Xiantao Li

Research output: Contribution to journalArticle

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Abstract

In this paper, we study the accuracy of Hardy-type formulas for the approximation of continuum quantities from atomistic simulations. Such formulas are derived by expressing the displacement, deformation gradient and stress in terms of certain kernel functions. We propose three criteria for choosing appropriate kernel functions to significantly improve the sampling accuracy. We present a simple procedure to construct kernel functions that meet these criteria. Furthermore, numerical tests on homogeneous and non-homogeneous systems provide validations for our analysis.

Original languageEnglish (US)
Article number045008
JournalModelling and Simulation in Materials Science and Engineering
Volume22
Issue number4
DOIs
StatePublished - Jun 2014

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All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Computer Science Applications

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