STRESS DISTURBANCES ARISING FROM CUT FIBER AND MATRIX IN UNIDIRECTIONAL METAL-MATRIX COMPOSITES CALCULATED BY MEANS OF A MODIFIED SHEAR LAGANALYSIS

A useful method to calculate stress disturbances arising from cut fibr es is the so-called shear lag analysis, in which it is assumed that fi bres act to carry tensile stress without transferring applied stress t o the matrix, and the matrix acts to transfer stress to the fibres wit hout carrying tensile stress. This assumption gives a limit for applic ation. In the present work, with unidirectional metal matrix composite s in mind, the usual two-dimensional shear lag analysis was modified t o express the situation where both fibres and matrix act to carry appl ied stress and also to transfer stress. By using this modified method, tensile strain concentration in the fibres and matrix adjacent to cut fibres and matrix, and shear stresses at the interface between fibres and matrix, were calculated for some examples.