A direct micromechanical approach toward the development of quadratic stress gradient failure criteria for textile composites

Ryan L. Karkkainen, Bhavani V. Sankar, Jerome T. Tzeng

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Based upon previous results of direct micromechanical method (DMM) analysis of the representative volume element (RVE) of a plain-weave textile composite, two methods for predicting failure envelopes are presented: a parametric ellipse-fitting scheme, and a 27-term quadratic stress-gradient failure criterion. Both include the consideration of micro level stress gradients and effectively predict failure in agreement with the DMM. The parametric ellipse-fitting method was found to agree with DMM results to within a few percent. The quadratic failure criterion was found to agree within 9.3%, but the method is more robust in its ability to predict failure for complex loading cases.

Original languageEnglish (US)
Pages (from-to)1917-1937
Number of pages21
JournalJournal of Composite Materials
Volume41
Issue number16
DOIs
StatePublished - Aug 1 2007
Externally publishedYes

Keywords

  • Finite element analysis.
  • Strength
  • Textile composites

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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