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Analysis of shear stress wrinkling of asymmetric sheet specimen under offset loading

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Abstract

The commonly used wrinkling evaluation methods such as cup forming and the Yoshida buckling test (YBT) only consider the symmetric sheet specimen and loading, therefore a deviation from the reality is inevitable. A method using the asymmetric specimen (AS) under offset loading is proposed and investigated with two materials SUS304 and DC04. Results show that the unbalanced external force in AS induces special stress state that is not included in YBT at wrinkling onset, where the shear stresses are dominant. The length and height evolution of the wrinkle is controlled by the principal stresses, and the direction gradually approaches the tensile axis during deformation. The shear stress decreases with the length/width ratio increases, but it rises at first and then falls when the clamping width increases. The error between the simulation and experiment is 2.9 %. This method can be used to examine the shear wrinkling properties of sheet metal.

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Acknowledgments

This work was supported by the Natural Science Foundation of Chongqing, China (cstc2020jcyj-msxmX0420) and the National Natural Science Foundation of China (Grant No. 51575066).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Haoxing Tang, Tong Wen & Yin Zhou

  2. Chongqing Changan Automobile Co., Ltd., Chongqing, 400023, China

    Jiewei Hong

  3. HBIS Handan Iron & Steel Group Co., Ltd., Hebei, 056015, China

    Longzhu Zhang

Authors
  1. Haoxing Tang
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  2. Tong Wen
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  3. Jiewei Hong
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  4. Yin Zhou
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  5. Longzhu Zhang
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Corresponding author

Correspondence to Tong Wen.

Additional information

Haoxing Tang is a Ph.D candidate of Chongqing University. His research interests include sheet forming analysis and defect control.

Tong Wen is a Professor at Chongqing University. His current research interests include advanced materials processing technologies and numerical simulation methods in metal forming.

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Tang, H., Wen, T., Hong, J. et al. Analysis of shear stress wrinkling of asymmetric sheet specimen under offset loading. J Mech Sci Technol 36, 1451–1457 (2022). https://doi.org/10.1007/s12206-022-0232-5

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  • DOI: https://doi.org/10.1007/s12206-022-0232-5

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