钟伯明,魏嘉荃,贺杰

• 1:大庆石油学院机械系

• 2:大庆石油学院机械系

• 3:大庆石油学院机械系

摘要(Abstract)：

论述了J_(IC)测试技术的理论基础,主要概括了三点:1、在定常裂纹中,当HRR场大到足够包围断裂过程区时,J积分就是断裂参量,其临界值J_(IC)就是材料的一种断裂韧度;2、在扩展裂纹中,只要满足J控制裂纹扩展条件,J积分仍然是断裂参量,J_R曲线就表示材料的一种性能,而J_(IC)就是J_R曲线上的一个点;3、根据上述二点,利用J_R曲线就可以测定材料的断裂韧度J_(IC),而且J_(IC)可以是J_R曲线上的条件值。

关键词(KeyWords)：低温延性断裂韧度J_(IC);测试技术;理论基础;定常裂纹;扩展裂纹;HRR场;断裂过程区;J控制裂纹扩展条件

Abstract:

Keywords:

基金项目(Foundation):

作者(Author):钟伯明,魏嘉荃,贺杰

Email:

参考文献(References)：

• [1] J. R. Rice. A Path Independent Integral and the Approximate Analysis of Strain Concentration by Notches and Cracks. Journal of Applied Mechanics; 1968; Vol. 35

• [2] 陈篪,蔡其巩,王仁智.工程断裂力学.上册.国防工业出版社,1977

• [3] J. W. Hutchinson. Singular Behavior at End of Tensile Crack in Hardening Material. Journal of the Mechanics and Physics of Solids; January 1968; Vol 16, No. 1

• [4] J. R. Rice and G·F·Rosengren. Plane Strain Deformaton Near Crark Tip in Power-Law Hardening Material. Journal of the Mechanics and Physics of Solids; January 1968; Vol. 16, No. 1

• [5] C. F. Shin. Relationships between the J-integral and the Crack Opening Displacement for Stationary and Growing Cracks. General Electric Company TIS Report No. 79 CRD 075 Journal of the Mechanics and Physics of Solids; 1979

• [6] C·F·Shin and M·D·German. Requirements for a One Paramete Characterization of Crack Tip Fields by the HRR Singularity. General Electric Company TIS Report No. 79 CRD 076; 1979

• [7] 魏嘉荃等.低温下金属材料裂纹尖端纯化变形的研究.大庆石油学院学报,1990;(4)

• [8] 魏嘉荃等.低温下用J_R曲线确定金属材料延性断裂韧度J_(IC)研究.大庆石油学院学报,1990;(3)

• [9] J. W. Hutchinson and P·C·Paris. Stability Analysis of J-Controlled Crack Growth. in Elastic-Plastic Fracture, ASTM STP 668; 1979

• [10] C·F·Shin, R·H·Dean and M·D·German. on J-Controlled Crack Growth: Evidence, Requirements and Applications. General Electric Company; T13 Report, Schenectady, New York, 1981