Failure prediction of unidirectional carbon composite under biaxial loading

Jan Krystek, Radek Kottner, Tomas Kroupa, Vladislav Las


Currently, the failure of composite material is well predictable only in basic case of loading. In many of state of stress, failure of unidirectional composites cannot be predicted with existing failure criteria. Experiment and numerical simulation of the composite under biaxial loading was realized in this work. Specimens consist of high-strength carbon fibres and epoxy resin. Specimens were exposed to the combination of tension in the fibre direction and localized compression in transverse direction. Numerical models were created in finite element system MSC.Marc using eight-node brick elements. Transversely isotropic material properties were considered. A recently proposed nonlinear function with constant asymptote was used for dependence of shear modulus on shear strain. Predictive capabilities of the maximum stress, Hashin and LaRC04 criteria were evaluated by means of the comparison of experimental results and the numerical simulation.

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ISSN 1801-1217 (Print)
ISSN 1805-9422 (Online)
Published by the Czech Technical University in Prague, Faculty of Mechanical Engineering