ガラス短繊維強化ポリアミド6.6の強度および靭性に及ぼす繊維含有率の影響

概要

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Tensile and fracture toughness tests of glass-wisker reinforced polyamide 6.6 with various contents of glass-wisker were carried out to investigate the effect of wisker content on tensile strength and fracture toughness. Tensile strength increased with an increase in wisker content. This behavior can be explained on the basis of the Tsai-Hill hypothesis by considering the length and the orientation of the wiskers. However, at a high content of wisker, the experimental values become lower than the theoretically predicted values due to the stress concentration between wiskers. Although fracture toughness J_<IC> was reduced once with an increase in wisker content, when the volume fraction of wiskers became higher than 9% the J_<IC>-value increased with an increase in wisker content. This behavior seems to result from the change of micromechanisms of fracture at a relatively high wisker content, which is due to the interaction of wiskers.
社団法人日本機械学会の論文
1990-03-25