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http://dx.doi.org/10.5228/KSTP.2011.20.6.456

Quantitative Analysis of Elastic Recovery Behavior after Bending of Ultra High Strength Steel Sheet: Spring-back or Spring-go  

Kwak, E.J. ((주) 솔루션랩)
Lee, K. ((주) 솔루션랩)
Suh, C.H. (대구기계부품연구원)
Lim, Y.H. ((주) 신화)
Publication Information
Transactions of Materials Processing / v.20, no.6, 2011 , pp. 456-460 More about this Journal
Abstract
A major source of difficulty in die design for high strength steel is the high level of elastic recovery during unloading. The degree of elastic recovery is affected by factors such as material strength, bending angle, punch's corner radius and sheet thickness. Finite Element Method was used in the present work to quantitatively analyze the elastic recovery for various combinations of these parameters. In some cases elastic recovery happened in reverse direction. This phenomenon, which we call spring-go, was explained via changes in stress distribution in the panel occurring in the forming process.
Keywords
Spring-back; Spring-go; Elastic Recovery; Sheet Forming; Finite Element Method; Ultra High Strength Steel;
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