Biaxial Behavior of Fiber Reinforced Composites-Implications for Numerical Tools in Crash Energy Computations

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Robust failure theories are developed that proerly capture the deformation and failure mechanisms corresponding to multiaxial stress/deformation states, based on realistic experiments that simulate the essential ingredients present in a crash situation. A combination of experiments and analysis are conducted to study failure mechanisms and failure strength of composite structures under simple states of biaxial and uniaxial test simulating a variety of loading states. Improved material models are developed that serve as input to calculations for crash analysis.