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Finite Element Analysis of Residual Stress by Cold Expansion Method with Clamping Force in the Plate having Adjacent Holes  

Yang Won-Ho (성균관대학교 기계 공학과)
Cho Myoung-Rae (인덕대학 컴퓨터응용설계)
Jang Jae-Soon (성균관대학교 기계 공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.23, no.5, 2006 , pp. 149-154 More about this Journal
Abstract
The cold expansion method (CEM) is one of the widely used a method to improve the fatigue behavior of materials in aerospace industry. Such improvement is due to the compressive residual stress developed when a tapered mandrel goes through the fastener holes a little smaller than the mandrel. CEM is retarded of crack initiation due to the compressive residual stress developed on the hole surface. Many researchers are studied a finite element analysis of residual stress around fastener hole. But in case of real model, fastener hole has a clamping force after CE. Therefore, it is respected that residual stress distributions should be changed due to clamping forces. In this paper, it was performed finite element analysis of residual stress by clamping force after CE in the plate having adjacent holes. From this study, it has been found that compressive residual stress near the hole increases according to clamping force. Also, the more increase clamping force, the more increases compressive residual stress. However, tensile residual stress increase beyond clamping force area.
Keywords
Cold expansion method; Clamping force; Fastener hole; Finite element method;
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Times Cited By KSCI : 2  (Citation Analysis)
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