A new approach for evaluating crack growth resistance curve of mode II delamination by doubly end-notched tension tests

Shigeki Yashiro, Toshihide Agata, Akinori Yoshimura

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Quantitative determination of interlaminar fracture toughness that governs onset and growth of delamination is essential for engineering of composite materials and structures. This study proposes a new approach to evaluate both the initial fracture toughness and the crack growth resistance property of pure mode II delamination by tensile tests of specimens having two initial cracks, which were conceived from double-lap joints. The proposed test method achieves stable growth of mode II delamination using a fundamental testing system. This study presents the specimen configuration, the theory to evaluate the energy release rate, and experiment results. The mode II initial fracture toughness measured by the present approach agreed well with the results of conventional end-notched flexure tests. Furthermore, the crack growth resistance curves were evaluated by unloading-reloading tests of the proposed doubly end-notched tension specimens.

Original languageEnglish
Pages (from-to)119-133
Number of pages15
JournalAdvanced Composite Materials
Volume27
Issue number2
DOIs
Publication statusPublished - Mar 4 2018

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering

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