プラスチックの疲労挙動の分類

概要

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In the previous paper, the author proposed a new measuring method for tracing fatigue behavior of plastics. Here in the present experiment this method has been put into practice to study the fatigue behavior of the seven plastic materials, in addition to the three in the previous experiment, such as rise in temperature of the specimens and changes of their dynamic deflection. As the result the fatigue behavior can be classified into several types. Besides, an attempt has been made to relate the types of fatigue processes. However it is observed that in the cases of epoxide, polycarbonate, polystylene and polyester, the rise of temperature is not remarkable and there occur some changes in quality of the materials (e.g. elastic modulus changes). In the cases of polyamide, polytetrafluor oethylene and polymethyl methacrylate, the rise of temperature is remarkable and the materials become softer. In the cases of polycarbonate and polyvinyl chloride, the specimens have been observed as changing their shape by slow development of crack.
社団法人日本材料学会の論文
1968-11-15