Modeling the failure strength of debonded composite sandwich structure

Yi Hsin Nieh, Yen Kun Lai, Jia-Lin Tsai

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

Abstract

The research aims to investigate the failure behaviors of the composite sandwich structures with debond defect subjected to compression loading. Experimental results revealed that the sandwich structures with either thick face-sheet or short debonded length exhibit higher failure strength. Moreover, when the debonded length is short, the failure is dominated by global buckling followed by core failure. Nevertheless, when the debonded length is long, the failure mechanism becomes the local buckling followed by the crack extension from the debond defect tip. The nonlinear finite element simulation was performed on the sandwich samples for the failure analysis. It was found that when the failure is dominated by the global buckling, the strength can be characterized using the maximum principal strain criterion. On the other hand, when the failure mode is local buckling, the failure strength can be predicted using the damage zone method.

Original languageEnglish
Title of host publication16th European Conference on Composite Materials, ECCM 2014
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Electronic)9780000000002
StatePublished - 1 Jan 2014
Event16th European Conference on Composite Materials, ECCM 2014 - Seville, Spain
Duration: 22 Jun 201426 Jun 2014

Publication series

Name16th European Conference on Composite Materials, ECCM 2014

Conference

Conference16th European Conference on Composite Materials, ECCM 2014
CountrySpain
CitySeville
Period22/06/1426/06/14

Keywords

  • Debonded composite sandwich structure
  • Failure analysis
  • Finite element analysis

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  • Cite this

    Nieh, Y. H., Lai, Y. K., & Tsai, J-L. (2014). Modeling the failure strength of debonded composite sandwich structure. In 16th European Conference on Composite Materials, ECCM 2014 (16th European Conference on Composite Materials, ECCM 2014). European Conference on Composite Materials, ECCM.