ポリカーボネートの衝撃引張特性に関する研究 : 切欠き先端曲率半径と切欠き長さの影響

概要

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The effects of notch root radius and notch length on the tensile impact characteristics of Polycarbonate were investigated in this paper. The results obtained are as follows : (1) The maximum load per the real cross sectional area of test specimen was proportional to the minus one half power of notch root radius. The relation between the specific absorbed energy and the notch root radius was similar to that between the specific absorbed energy and temperature, and the small notch root radius corresponded to low temperature and the large one to high temperature. (2) The maximum load per cross section area decreased a little and the specific absorbed energy decreased with increase in relative notch length. (3) The dynamic energy release rate could be determined from the slope of straight line showing the relation between the absorbed energy and BWΦ, where B was the thickness, W was the width, and Φ was the geometrical factor. The dynamic stress intensity factor could be also determined. (4) It was observed that most of the absorbed energy was used to initiate the neckings and tear lines on the fractured surface when the notch root radius was large. The absorbed energy changed little even though the relative notch length changed.
社団法人日本材料学会の論文
1992-05-15