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Evolution of elastic modulus in roll forming

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Abstract

Roll forming is a continuous process in which a flat strip is incrementally bent to a desired profile. This process is increasingly used in automotive industry to form High Strength Steel (HSS) and Advanced High Strength Steel (AHSS) for structural components. Because of the large variety of applications of roll forming in the industry, Finite Element Analysis (FEA) is increasingly employed for roll forming process design. Formability and springback are two major concerns in the roll forming AHSS materials. Previous studies have shown that the elastic modulus (Young’s modulus) of AHSS materials can change when the material undergoes plastic deformation and the main goal of this study is to investigate the effect of a change in elastic modulus during forming on springback in roll forming. FEA has been applied for the roll forming simulation of a V-section using material data determined by experimental loading-unloading tests performed on mild, XF400, and DP780 steel. The results show that the reduction of the elastic modulus with pre-strain significantly influences springback in the roll forming of high strength steel while its effect is less when a softer steel is formed.

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Acknowledgments

The authors appreciate the financial support of the Australian Research Council (ARC Linkage grant - LP120100111). The authors would further like to thank Emeritus Professor J.L. Duncan for his assistance in writing this paper and dataM Sheet Metal Solutions GmbH for providing advice and access to their software package Copra-RF.

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Institute for Frontier Materials, Deakin University, Waurn Ponds, Pigdons Rd, Geelong, VIC, 3216, Australia

    A. Abvabi, A. Kupke & M. Weiss

  2. Department of Mechanical and Industrial Production, Mondragon Unibertsitatea, Loramendi 4, Mondragon 20500, Gipuzkoa, Spain

    J. Mendiguren

  3. School of Engineering, Deakin University, Waurn Ponds, Pigdons Rd, Geelong, VIC, 3216, Australia

    B. Rolfe

Authors
  1. A. Abvabi
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  2. J. Mendiguren
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  4. B. Rolfe
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  5. M. Weiss
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Correspondence to A. Abvabi.

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Abvabi, A., Mendiguren, J., Kupke, A. et al. Evolution of elastic modulus in roll forming. Int J Mater Form 10, 463–471 (2017). https://doi.org/10.1007/s12289-016-1295-6

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  • DOI: https://doi.org/10.1007/s12289-016-1295-6

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