1450 一方向複合材料引張強度の統一的決定法(S07-3 セラミックスおよびセラミックス系複合材料III,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

抄録

A comprehensive model that determines tensile strengths for various systems of unidirectional composites is presented. The model derives the strength of unidirectional composites as a function of single-fiber strength distribution, interfacial shear strength and matrix strength. The point of this model is to consider that a fiber group considered to be experiencing simultaneous fiber failures triggered by neighboring fiber failure is assumed to fail when the weakest fiber in the fiber group fails. A method to determine the magnitude of the fiber group for various systems of composites is discussed based on whether a crack located near a bi-materials interface penetrates into another material or deflects along the interface. The comprehensive model is established by integrating the magnitude of the simultaneous fiber failure into the conventional Global Load Sharing model.