Applications of JIntegral in Fracture Beneath Bearing Surface of Layered Substrate

doi:10.3969/j.issn.1006396X.2013.04.016

Journal of Petrochemical Universities ›› 2013, Vol. 26 ›› Issue (4): 74-77.DOI: 10.3969/j.issn.1006396X.2013.04.016

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Applications of JIntegral in Fracture Beneath Bearing Surface of Layered Substrate

(1. Institute of Electronic Technology, China Aerospace Science and Technology Corporation, Beijing 100094, China;  2. School of Mechanical Engineering, Liaoning Shihua University, Fushun Liaoning 113001, China)

Received:3013-03-05 Published:2013-08-25 Online:2013-08-25

J 积分在镀层基体平面压痕边界开裂中的应用

谢培¹,王晓华^2*

(1.中国航天科技集团电子技术研究院,北京100094;2.辽宁石油化工大学机械工程学院,辽宁抚顺113001)

作者简介:谢培(1987-),女,江苏靖江市,硕士。
基金资助:
国家自然科学基金资助项目(50771052;
50971068;11272141);辽宁省自然科学基金资
助项目(LS2010100;20102129)

Abstract

Abstract: When a rigid, flatended uniform indenter was pressed on the surface of a layered substrate, a singular stress field and Kdominant region should arise adjacent to the indentation edges. The indentation stress intensity factor is also a fracture parameter similar to the mode I crack, which represents the intensification of the stress fields. In present article, a method to formulize the ISIF for the singular stress fields induced by indentation is proposed based on the conservation integral. 

Key words: Indentation stress intensity factor, , Fracture, , Flatindentation, , Jintegral

摘要： 当二维平端刚性压头作用在镀层基体的表面时,在镀层材料的表面形成一个平面压痕,同时在压痕的边界处将诱生奇异应力场和K灢控制区。与裂纹问题类似,该应力场的平面压痕应力强度因子是描述奇异应力场应力集中程度的唯一参量。本文将利用守恒积分,讨论镀层基体平面压痕守恒积分的主要特征,同时给出镀层基体平面压痕应力强度因子的远场积分计算方法。

关键词: 压痕应力强度因子 , 断裂 , 平面压痕 , J-积分

XIE Pei,WANG Xiaohua. Applications of JIntegral in Fracture Beneath Bearing Surface of Layered Substrate[J]. Journal of Petrochemical Universities, 2013, 26(4): 74-77.

谢培,王晓华. J 积分在镀层基体平面压痕边界开裂中的应用[J]. 石油化工高等学校学报, 2013, 26(4): 74-77.

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Applications of JIntegral in Fracture Beneath Bearing Surface of Layered Substrate

J 积分在镀层基体平面压痕边界开裂中的应用

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