The extended peridynamic model for elastoplastic and/or fracture problems

Research output: Contribution to journalArticleResearchpeer-review

Authors

  • Wei Jian Li
  • Tao You
  • Tao Ni
  • Qizhi Zhu
  • Leong Hien Poh

External Organisational units

  • Hohai University
  • National University of Singapore (NUS)
  • Helmholtz Centre for Environmental Research‐UFZ, Leipzig

Abstract

The strain-based implementation method for the extended peridynamic model (XPDM) resolves the limitation of standard models where only a fixed Poisson's ratio can be achieved. In this contribution, the XPDM formulation is extended to include bond breakage and/or plasticity mechanisms. The elastoplastic and bond breakage algorithms are elaborated. To capture the fracture process, a shear mechanism is now incorporated to the bond breakage response, in addition to the standard stretching failure mode. It is shown that the shear mechanism is required to accurately reproduce mixed mode fracture behavior observed experimentally. To demonstrate the predictive ability of the strain-based XPDM, a wide range of quasi-static and dynamic loading conditions, for both brittle and elasto-plastic materials, is considered against experimental results or practical engineering scenarios.

Details

Original languageEnglish
Pages (from-to)5201-5229
Number of pages29
JournalInternational journal for numerical methods in engineering
Volume123.2022
Issue number21
DOIs
Publication statusPublished - 15 Nov 2022