ポリカーボネイトの計装化シャルピー衝撃特性に関する研究 : 衝撃速度と温度の影響

概要

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The instrumented Charpy impact characteristics of polycarbonate are investigated in terms of the effects of impact velocity and temperature. The results obtained are as follows : (1) The inertia load appearing in the load wave initiated by striking the test specimen against the hammer of the impact tester is corrected by a mean square approximation method. The maximum load and the absorbed energy can be determined by this method. (2) The maximum load and the specific absorbed energy per real cross-sectional area decrease with increase in the impact velocity. There is constant temperature taking the lowest load in the relationship between the maximum load or the specific absorbed energy per real cross-sectional area and temperature. The lowest load or energy is shifted to the higher temperature by the higher impact velocity. (3) The relationship between the dynamic fracture toughness, K_<Id> and K_I, or between K_<Id> and temperature is similar to the relationship between the maximum load per real cross-sectional area and the impact velocity, or between the maximum load and the temperature, respectively. (4) The patterns of fractured surface correspond to the instrumented Charpy impact characteristics when the conditions of impact velocity and the temperature are changed.
一般社団法人日本機械学会の論文
1993-03-25