Determination of residual stress intensity factor in the compact tension coupon

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• 作者：Mitchell D. Olson ; Michael R. Hill ; ^{mrhill@ucdavis.edu}
• 关键词：Residual stress ; Stress intensity factor ; Brittle fracture ; Fracture mechanics
• 刊名：Engineering Fracture Mechanics
• 出版年：2012
• 期刊代码：33_00137944
• 类别：ms
• 出版时间：July, 2012
• 卷：88
• 期：Complete
• 页码：28-34
• 文件大小：596 K

摘要

This paper provides an influence function required to compute the residual stress intensity factor in the compact tension coupon, as a function of crack length, from measurements of back-face strain as a function of crack length. The influence function is determined from a reference solution for the C(T) with uniform applied pressure on the crack face that provides stress intensity factor and strain over a broad range of crack length (measured from the front face) and strain gage length. A closed form surface fit provides values of the influence function as a function of crack length and strain gage length.