On the use of non-iterative methods in cohesive fracture

J. Alfaiate, L. J. Sluys

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Localisation of initially diffused cracking in softening materials is a numerically challenging task, which is difficult to accomplish with conventional iterative methods. The sequentially linear approach has been used to overcome convergence problems. However, the use of such a total approach raises some difficulties, namely can not be treated in a straightforward way and significant load decays may occur. In this manuscript, new non-iterative numerical methods are proposed to overcome the difficulties mentioned above: (i) an improved total non-proportional analysis and (ii) a purely incremental approach. Similar to the Sequentially Linear Approach, the evolution of the material response is based on the control of the damage state. A mixed-mode discrete damage model is used to exemplify the implementation of these methods. Finally, examples are presented to illustrate the improvements obtained with these new techniques.

Original languageEnglish
Pages (from-to)167-186
Number of pages20
JournalInternational Journal of Fracture
Volume210
Issue number1-2
DOIs
Publication statusPublished - 1 Mar 2018

Keywords

  • Non-iterative methods
  • Non-proportional loading

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