三维介质中复合型裂纹扩展的断裂准则

doi:10.3863/j.issn.1000-2634.1988.01.006

西南石油大学学报(自然科学版) ›› 1988, Vol. 10 ›› Issue (1): 52-67.DOI: 10.3863/j.issn.1000-2634.1988.01.006

三维介质中复合型裂纹扩展的断裂准则

易先忠肖芳淳

石油机械系

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1988-02-20 发布日期:1988-02-20

FRACTURE CRITERION OF THE MIXED MODE CRACK PROPAGATION IN THE THREE-DIMENSIONAL MEDIUM

Yi Xianzhong Xiao Fangchun

Received:1900-01-01 Revised:1900-01-01 Online:1988-02-20 Published:1988-02-20

摘要/Abstract

摘要： 断裂准则是评定含裂纹构件或结构的工作状态是否安全的基准和依据。本文从三维介质中复合型裂纹问题的分析入手,考虑裂纹尖端小范围屈服区对裂纹扩展的影响,提出了描述三维介质中任意形状裂纹扩展规律的F₀准则和E₀准则。这两个准则均与现有的实验资料吻合得很好,而且还有一个较为突出的特点,即能反映Ⅰ—Ⅱ—Ⅲ型复合裂纹和Ⅱ—Ⅲ型复合型裂纹中KⅢ对裂纹开裂角的贡献。这一特点是S准则^[1]、MG准则^[9]、C判据^[10]和W判据^[11]等一些断裂准则不具有的。

关键词: 断裂准则, 三维介质, 复合裂纹, 裂纹扩展规律

Abstract: Fracture criterion is the fundation and norm of judging whether the working state is steady. Consequently, beginning with the analysis of mixed mode crack problems in the three-dimensional medium, and having considered the effect of little plastic yield zone near a crack tip on breaking, this paper suggests two new dual-parameter fracture criterions(Fe criterion and Ee criterion), They are rather identical with the experimental data.

易先忠肖芳淳. 三维介质中复合型裂纹扩展的断裂准则[J]. 西南石油大学学报(自然科学版), 1988, 10(1): 52-67.

Yi Xianzhong Xiao Fangchun. FRACTURE CRITERION OF THE MIXED MODE CRACK PROPAGATION IN THE THREE-DIMENSIONAL MEDIUM[J]. 西南石油大学学报(自然科学版), 1988, 10(1): 52-67.

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三维介质中复合型裂纹扩展的断裂准则

FRACTURE CRITERION OF THE MIXED MODE CRACK PROPAGATION IN THE THREE-DIMENSIONAL MEDIUM

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