金属学报  1978, Vol. 14 Issue (4): 409-468

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用多次冲击法测定金属断裂韧性

杨峥

西北工业大学

FRACTURE TOUGHNESS TEST BY IMPACT-FATIGUE METHOD

Yang Zheng (North-West Engineering Institute)

杨峥. 用多次冲击法测定金属断裂韧性[J]. 金属学报, 1978, 14(4): 409-468.
. FRACTURE TOUGHNESS TEST BY IMPACT-FATIGUE METHOD[J]. Acta Metall Sin, 1978, 14(4): 409-468.

摘要 参考文献 相关文章 Metrics 全文: PDF(1836 KB)   摘要: 多次冲击条件下裂纹尖端应力强度因子的表达式为K_I=(AE/BW)~(1/2)·F(a/W)。经柔度法标定,其临界值可用以度量材料的断裂韧性。所得结果相当于加载速率为k=10~5公斤/毫米~(3/2)/秒下的动态断裂韧性K_(Id)。断口上临界裂纹尺寸在(a/W)=0.36-0.6范围内,结果有效。多次冲击法较为简便,只需测出断口上的临界裂纹尺寸,便可在已绘好的曲线上直接查出材料的断裂韧性。在实际生产中可以作为一种筛选方法应用。 Abstract：The crack tip stress intensity factor under impact-fatigue conditions expressed by the equation K_I=(AE/BW)~(1/2)·F(a/W) may be used as a measure of fracture toughness of materials on condition that a proper calibration of K_I with the compliance measurements is made. The fracture toughness values obtained by the above method are equivalent to the dynamic fracture toughness K_(Id) with loading rate of the order (?)=10~5kg/mm~(3/2)/sec, and would be valid as the critical crack length of the fracture surface of specimens are constrained within the range of a/W=0.36-0.6.The above method is simple and convenient for testing fracture toughness of materials. The testing results may be obtained directly from a ready made curve provided that the critical crack length on fracture surface has been predetermined. It can be recommended as a screen method in practical work. 收稿日期: 1978-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 杨峥 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1978/V14/I4/409 [1] 陈篪,力学,1974,№ 4,121． [2] 北京钢铁研究院断裂韧性研究组,金属学报,13(1977) ,214． [3] Turner, C.E., Impact Testing of Metals, Amer. Soc. Test. Mater., Spec. Tech. Publ. № 466, (1970) , p. 93．\ No related articles found! Viewed Full text Abstract Cited   Shared      Discussed