Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Quantitative Analysis of Elastic Recovery Behavior after Bending of Ultra High Strength Steel Sheet: Spring-back or Spring-go

유한요소법을 이용한 초고강도 판재 굽힘에 따른 후변형의 정량적 분석: Spring-back or Spring-go

  • Received : 2011.07.19
  • Accepted : 2011.09.05
  • Published : 2011.10.01
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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.

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References

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  1. The Effects of Process Parameters of Multi-Stage Forming on Springback for a U-Channel made of Ultra-High-Strength Steel vol.36, pp.3, 2012, https://doi.org/10.3795/KSME-A.2012.36.3.283
  2. Design of a Hinge Bracket Forming Process Using Thick Plate vol.25, pp.4, 2016, https://doi.org/10.5228/KSTP.2016.25.4.227