ポリカーボネートの力学劣化挙動(材料の強度と力学的評価)

概要

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In general, polymer is it is a deteriorated material. The research on the degradation has been done from various viewpoints between the past and present. However, the influence by the degradation of the dynamics load had been hardly done. Then, the influence on the tensile behavior by the dynamics load was examined by using the polycarbonate for the test specimen in this research. As a result, It is cut into a low molecule by the tensile load. It was confirmed that the yield stress depended on intertwining the molecular chain by the influence, and the rupture stress depended on the molecular weight in addition. As a result, influencing the mechanical property became clear. Moreover, cutting the molecular chain is repeated by the cyclic loading over the whole as for the test specimen. The intertwining point decreases because of the influence. In addition, the material strength's decreasing by the cyclic loading's joining in the crack tip neighborhood became clear.
2004-03-03