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Calculation Method for Cold Flow Stress of Al6082 Based on Tensile Test and Compression Test Results

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Abstract

A method to obtain flow stress in the plastic deformation state is investigated in this study. The flow stress prior to necking is calculated based on Hollomon’s constitutive equation using the strain rate and stress obtained from a tensile test, whereas the strain hardening coefficient after necking is obtained using the stress and strain rate obtained from a compression test; subsequently, the two flow stresses are combined. Two-dimensional rigid plastic finite element analysis considering ductile fracture in the stress test is conducted by inputting the proposed flow stress. It is confirmed that the shape and dimensions of the necking part on the load–displacement curve from the finite element analysis are similar to those obtained experimentally, thereby confirming the validity of the proposed flow stress calculation.

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Acknowledgements

This study was supported by the Jungwon University Research aGrant (2018) We would like to thank Editage (www.editage.co.kr) for English language editing.

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Authors and Affiliations

  1. Department of Aero-Mechatronics Engineering, Jungwon University, 85, Munmu-ro, Goesan-eup, Geosan-Gun, Chungbuk, 28024, South Korea

    Hyoung-Woo Lee & Jong-Hun Kang

  2. Graduate School of Mechanical Engineering, Jungwon University, 85, Munmu-ro, Goesan-eup, Geosan-Gun, Chungbuk, 28024, South Korea

    Jae-Hong Yoo

  3. Korea Conformity Laboratories, Youngnam Regional Center, Changwon, 51395, South Korea

    Yong-Chul Kwon

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  1. Hyoung-Woo Lee
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  2. Jae-Hong Yoo
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  3. Yong-Chul Kwon
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  4. Jong-Hun Kang
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Correspondence to Jong-Hun Kang.

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Lee, HW., Yoo, JH., Kwon, YC. et al. Calculation Method for Cold Flow Stress of Al6082 Based on Tensile Test and Compression Test Results. Int. J. Precis. Eng. Manuf. 22, 1337–1344 (2021). https://doi.org/10.1007/s12541-021-00538-6

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