Back-face strain compliance relation for compact specimens for wide range in crack lengths

被引：26
作者：
Newman, J. C., Jr. [1 ]
Yamada, Y. [2 ]
James, M. A. [3 ]
机构：
[1] Mississippi State Univ, Dept Aerosp Engn, Mississippi State, MS 39762 USA
[2] NASA, Ohio Aerosp Inst, Glenn Res Ctr, Cleveland, OH 44135 USA
[3] Alcoa Tech Ctr, Alcoa Ctr, PA 15069 USA
来源：
ENGINEERING FRACTURE MECHANICS | 2011年 / 78卷 / 15期
关键词：
Cracks; Compact; Back-face strain; Elasticity;
D O I：
10.1016/j.engfracmech.2011.07.001
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A back-face strain (BFS) compliance relation has been developed for the standard compact C(T) specimen for a very wide range in crack-length-to-width (a/W) ratios. Both finite-element and boundary-element methods were used to develop the BFS relation for a/W ratios from 0.2 to 0.95. In addition, experimentally determined compliance values on four metallic materials compared well with the new relation over nearly the complete a/W range. The new relation can be used to monitor crack-length-against-cycles using computerized crack-monitoring systems that are currently used with the crack-mouth-opening-displacement (CMOD) gage method, and the relation has been cast in a standard form compatible with existing compliance crack length monitoring systems. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：2707 / 2711
页数：5
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