310 ポリプロピレンにおけるひずみ速度及びガラス転移温度に対する応力ひずみ挙動について(OS 材料・構造の動的特性(2))

抄録

Due to the strong non-linearity and the difficulty of obtaining data on the behavior of polymers at high strain rates, most crash simulations use materials data based on quasi-static testing. This study therefore attempted to obtain materials data for polypropylene used in the interior and exterior of automobiles at high strain rates. The material data obtained differs from data obtained through the linear extrapolation of stress to model the behavior of polymers at high strain rates. Then, the yield stress is estimated based on the strain rate and glass transition temperature effects. Finally, the estimation method is validated with results obtained using commercial finite element model.