Prediction of energy release rates for echelon crack formation in mode III delamination toughness tests

A. L. Horner, Barry D Davidson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The energetics leading to the formation and growth of an array of echelon cracks along a planar delamination front in a split laminate subjected to anti-plane shear loading are studied. The finite element method is used to model both single and multiple echelon cracks that intersect the planar delamination front. Energy release rates are determined along the echelon crack peripheries and along the planar delamination front. Various echelon crack shapes are evaluated in order to represent progressive stages of growth. It is shown that the echelon cracks advance due to primarily mode I conditions, whereas a mode III criterion is appropriate for predicting advance of the planar delamination. It is further shown that mode I advance of the echelon crack and mode III advance of the delamination are competing yet coupled processes, and that the sequence of events predicted by this approach agrees with what has been observed experimentally.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 31st Technical Conference, ASC 2016
PublisherDEStech Publications Inc.
ISBN (Electronic)9781605953168
StatePublished - 2016
Event31st Annual Technical Conference of the American Society for Composites, ASC 2016 - Williamsburg, United States
Duration: Sep 19 2016Sep 21 2016

Other

Other31st Annual Technical Conference of the American Society for Composites, ASC 2016
CountryUnited States
CityWilliamsburg
Period9/19/169/21/16

ASJC Scopus subject areas

  • Ceramics and Composites

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    Horner, A. L., & Davidson, B. D. (2016). Prediction of energy release rates for echelon crack formation in mode III delamination toughness tests. In Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016 DEStech Publications Inc..