Nonlinear fracture mechanics analysis of end notched flexure specimen with tough interlayer
- Univ. of Tokyo (Japan). Dept. of Naval Architecture and Ocean Engineering
An elastic-plastic analysis of the end notched flexure (ENF) specimen with tough interlayer is conducted by two-dimensional finite element modeling. Interlayer refers to a mixture of thermoplastic particles and thermoset base resin, selectively localized between laminae as a thin resin film. It is observed experimentally that plastic deformation in the interlayer has direct effect upon the interlaminar delamination growth and the toughness. The purpose of study is to evaluate Mode II interlaminar fracture toughness of interlayer-toughened composites with fracture mechanics parameter, J-integral, which is applicable to elastic-plastic regime. Effect of the material nonlinearity on the load versus crack shear displacement (CSD) diagram and J-integral is examined and limitation of linear elastic fracture mechanics approach to the tough composites is discussed.
- OSTI ID:
- 89840
- Report Number(s):
- CONF-9409291--; ISBN 1-56676-220-0
- Country of Publication:
- United States
- Language:
- English
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