一方向ガラス繊維強化プラスチック材へのくさびの押込みにおける等色線の形状とガラス繊維の破損との関係について

概要

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The phenomena of the deformation of unidirectional glass fiber reinforced plastic materials at the wedge indentation were studied by means of photoelastic method. Irregular pattern of isochromatic fringe and failure pattern which occur and progress in the yarn were observed. These were considered in comparison with isochromatic numbers. The main results obtained are as follows : (1) The irregularity of isochromatic fringe depends on the irregular distribution of residual stress in the yarn. (2) The failure pattern in the yarn is predicted by the shape of envelope of isochromatic fringe for both yarn and matrix. (3) Interface debonding which appears between fiber and matrix occurs under the elastic deformation, whereas the micro fracture of fiber and matrix occurs during the plastic deformation. (4) The contoure of whitening parts is very similar to the shape of isochromatic fringe except the fracture parts of yarn.
日本複合材料学会の論文