金属学报  1977, Vol. 13 Issue (z1): 57-153

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论裂纹扩展的判据

陈篪

ON THE CRITERION FOR CRACK EXTENSION

Chen Chih

陈篪. 论裂纹扩展的判据[J]. 金属学报, 1977, 13(z1): 57-153.
. ON THE CRITERION FOR CRACK EXTENSION[J]. Acta Metall Sin, 1977, 13(z1): 57-153.

摘要 参考文献 相关文章 Metrics 全文: PDF(1937 KB)   摘要: 本文从裂纹顶端必然钝化和应力应变有界的客观事实出发,通过对实验数据的分析指出:裂纹扩展的判据是最大切应力判据(延性断裂机制)或最大正应力判据(解理断裂机制)。结合特定的条件,由上述基本判据可导出相应的临界关系。在平面应变、小范围屈服情况下,这临界关系正是众所周知的K_1=材料常数K_(Ic),而在平面应力、小范围屈服情况下,则得出K_c=(π/8kσ_Fε_F~2BE)~(1/2)的结果。对影响K_(Ic)的因素也作了讨论。 Abstract：Based on the inevitable blunting of the crack-tip and the finiteness of stressand strain, it is shown that the basic criterion for crack extension is either themaximum shear stress criterion (for ductile fracture) or the maximum principalstress criterion (for cleavage fracture) after analyzing three series of experimentaldatum. Critical relations can be deduced under specific conditions. In the caseof plane strain and small scale yielding, this critical relation is just the well-known K_I=K_(Ic)=material constant; whereas, in the case of plane stress andsmall scale yielding, the critical relation deduced is K_c=(π/8kσ_Fε_F~2BE)~(1/2). Factorseffecting K_(Ic) were also discussed.      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 陈篪 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1977/V13/Iz1/57 [1] 陈篪、姚蘅,切口尖度与断裂韧度,1974,待发表工作. [2] Bridgman, P. W., Studies in Large Plastic Flow and Fracture, McGraw, New York, 1952． [3] 陈篪,待发表工作. [4] Rosenfield, A. R. and Hahn, G. T., ASM Trans. Quart., 59 (1966) , 962． [5] 陈篪等,金属学报 11(1975) ,174． [6] Kobayashi, A. S., Fracture, ed. by H. Liebowitz, Vol. Ⅲ, Academic Pr., New York, 1971, pp. 312--370． [7] Marloff, R. H. et al., Exp. Mech., 11 (1971) , 529． [8] Neuber, H., Kerbspannungslehre, Julius Springer, Berlin, 1937． [9] Weiss, V., Fracture, ed. by H. Liebowitz, Vol. Ⅲ, Academic Pr., New York, 1971, pp. 228--266． [10] McClintock, F. A. and Irwin, G. R., Amer. Soc. Test. Mater., Spec. Tech. Publ, № 381, pp. 84--113． [11] 陈篪,力学,1975,№ 2,78． [12] Neuber, H., J. Appl. Mech., 28 (1961) , 544． [13] Rice, J. R., J. Appl. Mech., 34 (1971) , 287． [14] Godwa, C. V. B. and Topper, T. H., J. Appl. Mech., 37 (1970) , 77． [15] 陈篪、潘灏,待发表工作. [16] 邓枝生、陈篪,待发表工作. [17] Hahn, G. T. and Rosenfield, A. R., Amer. Soc. Tech. Mater., Spec. Tech. Publ., № 432, 1968, p. 5． [18] Birkle, A. J. et al., ASM Trans. Quart., 59 (1966) , 59． [19] Cox, T. B. and Low, J. R., Met. Trans., 5 (1974) , 1457 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed