Evaluation of Compressive Nonlinear Response of Unidirectional Carbon Fiber Reinforced Composites using a Modified Sandwich Beam Specimen in Flexure

Nonlinear mechanical behaviors of unidirectional composites were evaluated under compressive loading up to high-strain ranges using a sandwich beam specimen with the emphasis on the elastic material nonlinearity in the fiber direction. Specimen configuration and evaluation method, including material nonlinear effects, were proposed, and the compressive nonlinear behavior and strength of unidirectional carbon fiber reinforced composites were...