Cohesive fracture growth in a thermoelastic bimaterial medium

S. Secchi, L. Simoni, B. A. Schrefler

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The paper presents a fully-coupled numerical model for the analysis of fracture initiation and propagation in a two dimensional non-homogeneous elastic medium driven by mechanical loads and transient thermal fields. Cohesive crack behaviour is assumed for the solid. The solution of the coupled problem is obtained by using the finite element method without using special approximation techniques nor interface elements. Evolution of the process zone results in continuous changes of the domain topology. This is accounted for by updating the boundary geometry and successive remeshing of the domain. Optimality of the shape of the finite elements generated is controlled and the mesh density is adjusted adaptively on the basis of an error estimator. Two numerical applications are presented, which demonstrate the effectiveness of the proposed procedure. In the first, comparison is made with a laboratory experiment, whereas the second handles a problem with crack path completely unknown.

Original languageEnglish (US)
Pages (from-to)1875-1887
Number of pages13
JournalComputers and Structures
Volume82
Issue number23-26
DOIs
StatePublished - Sep 2004

Keywords

  • Adaptive remeshing
  • Bimaterial sample
  • Cohesive fracture
  • Discrete crack models
  • PMMA
  • Thermal loads

ASJC Scopus subject areas

  • Computer Science Applications
  • Computational Mechanics

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