微量無機添加物の含有によるガラス短繊維強化熱可塑性樹脂の強度低下の数値予測法

概要

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The tensile strength of injection-molded short glass fiber reinforced themoplastics which have been pigmented with a slight amount of titanium dioxide (TiO_2) decreases. In this paper, on the basis of micromechanics, the strength deterioration of the unnotched composite and the load-displacement relation of the notched one were predicted. Damage developed in the composite was modeled as a fictitious crack with cohesive stress acting on the crack surface. The relationship between the cohesive stress and crack opening displacement, i. e. , the tension-softening relation, was theoretically determined. The tensile strength of the unnotched composite was estimated using the maximum stress from the tension-softening relation. Characterizing the mechanical behavior of the damage developed at the notch tip as the tension-softening relation, the load-displacement curve was obtained. The predicted tensile strength and load-displacement curve were compared with experimental ones and good agreements were found between the predicted and experimental results.
一般社団法人日本機械学会の論文
1995-01-25