金属学报  1984, Vol. 20 Issue (5): 341-347

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压应力条件下缺口产生疲劳裂纹的研究

刘天化;褚武扬;肖纪美;金连强

首都钢铁公司设计院;北京钢铁学院;北京钢铁学院;北京钢铁学院

FATIGUE-CRACK INITIATED FROM NOTCH TIP UNDER CYCLIC COMPRESSIVE LOAD

LIU Tianhua (Design Institute of Shoudu Iron arid Steel Co.; Beijing); CHU Wuyang; XIAO Jimei; JIN Lianqiang (Beijing University of Iron and Steel Technology)(Manuscript received 26 March; 1983; revised manuscript 27 December; 1983)

刘天化;褚武扬;肖纪美;金连强. 压应力条件下缺口产生疲劳裂纹的研究[J]. 金属学报, 1984, 20(5): 341-347.
, , , . FATIGUE-CRACK INITIATED FROM NOTCH TIP UNDER CYCLIC COMPRESSIVE LOAD[J]. Acta Metall Sin, 1984, 20(5): 341-347.

摘要 参考文献 相关文章 Metrics 全文: PDF(1302 KB)   摘要: 对超高强度钢和铝合金的研究表明,在压-压交变载荷下缺口前端能引发疲劳裂纹,其门槛值比拉应力高3—4倍。压应力下缺口裂纹长到一定尺寸(如0.2—0.5mm)后就将停止扩展。如果压应力的最小载荷(绝对值)接近零,则裂纹容易形核(门槛值和拉应力相近),且能扩展较长的距离。 Abstract：Fatigue-crack initiation and growth was investigated by testing an ultra-high strength steel and Al alloy using a notch specimen under cyclic compressive load. Results showed that the fatigue-crack initiation and growth is started from the notch tip and its threshold value △σ_(th) or △K_(th)(ρ) is about 4 times the magnitude of that under tensile load. The crack growth could propagate at a decreasing rate and stop eventually until such length as 0.2—0.5 mm. The threshold value △K_(th)(ρ) under cyclic compressive load would be identical with that under cyclic tensile load and the fatigue-crack could continue to propagate if the minimum cyclic compressive load is near zero. The dα/dN under compression-zero fatigue, however, is 10 to 100 times smaller than that under tensile fatigue. 收稿日期: 1984-05-18      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 刘天化 褚武扬 肖纪美 金连强 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1984/V20/I5/341 1 Reid, C. N. Williams, K.; Hermann, R., Fatigue Eng. Mater. Struct., 1(1979) . 267． 2 褚武扬编著,断裂力学基础,科学出版社,1979,p.116． 3 姚京;褚武扬;肖纪美,金属学报,19(1983) ,A445． 4 Chu W. Y. (褚武扬); Ma R. T. (马若涛); Hsiao C. M. (肖纪美), Scr. Met., 18(1984) , 579． 5 Chu W. Y. (褚武扬); Jing Y. (姚京); Hsiao C. M. (肖纪美), Corrosion, 40(1984) , 302．W No related articles found! Viewed Full text Abstract Cited   Shared      Discussed