Periodic unit-cell simulation for transverse tensile failure of unidirectional composites with cohesive zone model

J. Koyanagi, Y. Sato, Tomonaga Okabe, S. Yoneyama

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

Abstract

This study investigates strain-rate dependent transverse tensile failure of unidirectional composite materials with a periodic unit-cell simulation. The unit cell consists of 20 fibers aligned at random in the matrix. Elasto-viscoplastic constitutive equation including continuum damage mechanics is used for the matrix. This enables us to simulate strain-rate dependence of matrix plastic deformation and damage. For the fiber/matrix interface, cohesive zone model is also employed. Interface failure under combined stress state of normal and shear is considered. Fibers are assumed to be elastic body. When strain rate is relatively high, naturally, the maximum matrix stress is relatively large due to the viscoplastic properties so that the interface tends to fail in advance of matrix yielding and/or failure. On the contrary, when strain rate is low, the maximum matrix stress becomes small and interface failure does not appear.

Original languageEnglish
Title of host publicationECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Print)9788888785332
Publication statusPublished - 2012 Jan 1
Event15th European Conference on Composite Materials: Composites at Venice, ECCM 2012 - Venice, Italy
Duration: 2012 Jun 242012 Jun 28

Publication series

NameECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials

Other

Other15th European Conference on Composite Materials: Composites at Venice, ECCM 2012
CountryItaly
CityVenice
Period12/6/2412/6/28

Keywords

  • Cohesive zone model
  • Periodic unit-cell simulation
  • Polymer matrix composite
  • Strain-rate dependence
  • Transverse failure

ASJC Scopus subject areas

  • Ceramics and Composites

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