A Randomly Enlarging Critical Core Theory of Unidirectionally Fiber-reinforced Composites

【摘要】 <正> Based upon the micro-stochastic failure mechanisms of composites,a new micromechanical statistical model,i.e.randomly enlarging critical core theory,for the tensile failure of unidirectional composites is proposed,with which we can overcome the primary imperfections of the existing chain-of-bundles probability model.On the basis of the established statistical model,the strength distribution and the failure criterion of composites are derived.The predictions of strength for T300/5208 and glass/epoxy show very good agreement with the existing experimental results,thus verifying the reasonableness and correctness of the present theory.更多还原

【Abstract】 Based upon the micro-stochastic failure mechanisms of composites,a new micromechanical statistical model,i.e.randomly enlarging critical core theory,for the tensile failure of unidirectional composites is proposed,with which we can overcome the primary imperfections of the existing chain-of-bundles probability model.On the basis of the established statistical model,the strength distribution and the failure criterion of composites are derived.The predictions of strength for T300/5208 and glass/epoxy show very good agreement with the existing experimental results,thus verifying the reasonableness and correctness of the present theory.更多还原