金属学报  1987, Vol. 23 Issue (5): 421-424

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过载对疲劳裂纹低速扩展的影响

邓蓉英

中国科学院力学研究所

EFFECT OF OVERLOAD ON FATIGUE CRACK PROPAGATION NEAR THRESHOLD

by DENG Rongying (Institute of Mechanics; Academia Sinica; Beijing)(Manuscript received 12 May; 1986; revised manuscript 22 August; 1986)

邓蓉英. 过载对疲劳裂纹低速扩展的影响[J]. 金属学报, 1987, 23(5): 421-424.
. EFFECT OF OVERLOAD ON FATIGUE CRACK PROPAGATION NEAR THRESHOLD[J]. Acta Metall Sin, 1987, 23(5): 421-424.

摘要 参考文献 相关文章 Metrics 全文: PDF(1448 KB)   摘要: 本文研究一次拉伸型过载对奥氏体不锈钢疲劳裂紋近门槛值扩展的影响.试验结果表明,过载对门槛值的影响和过载比P_0/P_(max)的大小有关;P_0/P_(max)>1.4时,门槛值随着过载比增加而线性提高.提出了裂纹扩展速率减缓和门槛值提高的主导原因是过載大大促进裂纹顶端闭合,即塑性诱发闭合和断裂表面粗糙诱发闭合. Abstract：The effect of single tensile overload on crack propagation near the threshold in an austenite stainless steel has been investigated. The threshold value increases with the increase of overload ratio P_o/P_(max) as it is larger than 1.4. But the threshold value will not be effected by this ratio while it is less than 1.4. It was supposed that the reduction of crack propagation and increase of the threshold value arise primaryly from crack tip closure,i.e. plasticity-induced and roughness-induced closure. 收稿日期: 1987-05-18      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 邓蓉英 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I5/421 1 Jones R E. Eng Fract Mech, 1973; 5: 585 2 Matsuoka S, Tanaka K. Eng Fract Mech, 1978; 10: 515 3 Bathias C, Vancon M. Eng Fract Mech, 1978; 10: 409 4 邓蓉英,于桂清,李禾.金属学报,1986;22:A409 5 Elber W.ASTM, STP 486, 1971: 230 6 Schijve J. Rep Mp 195, National Luchtvaart Laloratorium Amsterdam, 1960b No related articles found! Viewed Full text Abstract Cited   Shared      Discussed