金属学报  1987, Vol. 23 Issue (5): 349-355

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位错表面像力对裂端范性区位错平衡分布的影响

刘速;熊良钺;龙期威

中国科学院金属研究所;中国科学院金属研究所;中国科学院金属研究所

EFFECT OF DISLOCATION IMAGE FORCE ON DISLOCATION DISTRIBUTION IN PLASTIC ZONE AT CRACK TIP

by LIU Su; XIONG Liangyue; LONG Qiwei(C. W. Lung)(Institute of Metal Research; Academia Sinica; Shenyang)(Manuscript received 17 July; 1985; revised manuscript 17 April; 1986)

刘速;熊良钺;龙期威. 位错表面像力对裂端范性区位错平衡分布的影响[J]. 金属学报, 1987, 23(5): 349-355.
, , . EFFECT OF DISLOCATION IMAGE FORCE ON DISLOCATION DISTRIBUTION IN PLASTIC ZONE AT CRACK TIP[J]. Acta Metall Sin, 1987, 23(5): 349-355.

摘要 参考文献 相关文章 Metrics 全文: PDF(475 KB)   摘要: 本文按位错分布连续统理论,考虑了位错表面像力的影响,对裂纹顶端范性区位错平衡分布进行了计算,与把介质当作无限介质时计算的结果进行了比较.这里外加应力水平存在一极大值α_c,相应地存在临界范性区大小α_(c2)当(?)<α_c,或α<α_c时,位错表面像力的作用使裂端范性区增大;当α>α_c,产生韧带屈服.这个结果与裂端范性区正电子湮没实验观测是一致的. Abstract：The equilibrium dislocation distribution in the plastic zone at a crack tip has been calculated, where the influence of image force of dislocation was involved. The results were compared with that in which dislocation image force was omitted. A maximum value α_c was obtained for the applied stress level α, and thus a critical value α_c was correspondingly obtained for the size of plastic zone α, The dislocation image force makes the plastic zone become large while α<α_c, and the ligament yielding takes place if α>α_c. This qualitatively agrees with the experimental results of positron annihilation measurement published be fore. 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 刘速 熊良钺 龙期威 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I5/349 1 龙期威,熊良钺.物理学报,1984;33:755 2 Bilby B A, Cottrell A H, Swinden K H. Proc R Soc London, 1963; A272: 304 3 Kobayashi S, Ohr SM. Philos Mag, 1980; A42: 763 4 Chang SJ, Ohr SM. JAppl Phys, 1981; 52: 7174 5 Lung CW, Xiong L Y. Phys Status Solidi, (a), 1983; 77: 81 6 Jiang J, Xiong L Y, Lung C W, Ji G K, Liu N Q, Wang S Y. In: Coleman P G et al eds., Proc 6th Int Conf Positron Annihilation, held at Arlington, New York: North-Holland, 1982: 469= No related articles found! Viewed Full text Abstract Cited   Shared      Discussed