218 ポリカーボネイト樹脂を用いた常温ひずみ凍結(OS6-4 光弾性法I)(OS6 実験力学の新展開)  [in Japanese] 218 On the Room Temperature Frozen Strain Method by Using Polycarbonate Resin  [in Japanese]

The frozen strain method has been carried out by long time load under the low temperature or load in the short time over glass transition temperature. The former needs the long time course, the latter causes large deformation by the load, since the Young's modulus changes small and Poisson ratio increases. For the purpose of this experimental study, using the polycarbonate, trying to reduce the days spent for the experiment and to froze the strain under the room temperature. In the industrial product, the polycarbonate used in this study is made by the extruding. Therefore, there is the residual stress. Annealing is effective measures in order to reduce the residual stress. By comparing the polycarbonate with annealing to the polycarbonate without that, the effect of annealing is confirmed.