A phase field model for damage in elasto-viscoplastic materials

P. Shanthraj, L. Sharma, B. Svendsen, F. Roters, D. Raabe

Research output: Contribution to journalArticleAcademicpeer-review

40 Citations (Scopus)

Abstract

A phase field method for brittle fracture is formulated for a finite strain elasto-viscoplastic material using a novel obstacle phase field energy model. The obstacle energy model results in a crack profile with compact support, and thus gives a physically realistic description of the material behaviour at the vicinity of the crack tip. The resulting variational inequality is discretised by a finite element method, and is efficiently solved using a reduced space NEWTON method. The solution accuracy and numerical performance of this method is compared with a conventional phase field energy model for brittle fracture through representative examples, and a significant reduction in the numerical solution cost is demonstrated.

Original languageEnglish
Pages (from-to)167-185
Number of pages19
JournalComputer Methods in Applied Mechanics and Engineering
Volume312
DOIs
Publication statusPublished - 1 Dec 2016

Keywords

  • Finite deformation
  • Fracture
  • Phase field
  • Viscoplasticity

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