平織ガラスクロス複合材料の界面要素の材料定数決定法

概要

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In woven fabric composite under tensile loading, microfracture occurs in the transverse fiber bundle at the initial stage of the tensile test. Knee-point on the stress-strain curve appears due to the occurrence of the microfracture. The microfracture is defined as the first fracture phenomenon under tensile test. The stress at the microfracture ; initial microfracture stress is known to be affected by interfacial strength and can be used as the index of fiber/matrix interface. In this study, a new method which can specify material constants of interface was proposed. The initial microfracture stresses obtained both by finite element analysis and by experimental analysis were used, and the combination of elastic modulus and strength was determined by comparing both numerical and experimental results. As a result, on such conditions that the material constants of intersection element were same as those of resin element, when the elastic modulus of interface element in range from 3.2 GPa to 40 GPa was assumed, a unique strength of interface element in range from 20 MPa to 78 MPa could be determined.
一般社団法人日本機械学会の論文
1996-06-25