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一、引言落锤冲击是利用自由降落的重锤,冲断试样或使试样产生裂纹。变换高度、变换锤重,可以产生不同的冲击能量,以求得试样的最小破损能量。近年来,我国加强了落锤冲击试验的研究和应用。GB2841—81、SG246—81、HG2—1398—81等试验方法标准也逐步制订出来。八五年四月,上海化工厂为了对上水管、饮水管、民建管等硬 PVC、PP 塑料管材及其它化工材料,做抗冲击性能的试验和研究,委托金华试验机总厂研制最大冲击能量为98J 的 XJL—98落锤试验机。一九八六年四月,样机制造完毕交付上
I. Introduction Drop hammer impact is the use of free-falling hammer, thrust test specimen or sample cracks. Change the height, change the hammer weight, can produce different impact energy, in order to obtain the smallest sample damage energy. In recent years, our country has strengthened the research and application of falling weight impact test. GB2841-81, SG246-81, HG2-1398-81 and other test methods and standards are gradually developed. April 1985, Shanghai Chemical Plant in order to the water pipes, drinking water pipes, civil construction pipe and other hard PVC, PP plastic pipe and other chemical materials, to do the impact resistance of the test and research, commissioned Jinhua Testing Machine Plant to develop the greatest impact XJL-98 falling weight tester with 98J energy. In April 1986, the prototype was delivered and delivered