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A correction method of elastic modulus in compression tests for linear hardening materials

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Abstract

A correction method for linear hardening materials is brought forward to obtain the true (or nearly true) modulus of cylindrical specimens with middle aspect ratios in compression tests. By considering the stress concentration near the interface between the specimen and the compression platen caused by slanted contact, a “sandwich” model is developed. A correction formula is derived and all parameters can be obtained from the tested stress-strain curve. Experiments were performed on Al 2024 specimens with four aspect ratios. The corrected results are closer to the intrinsic modulus than the tested values, which verify the effectiveness of the correction method.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (Grant numbers 11372323, 11202209, and 11472275) and Opening fund of State Key Laboratory of Nonlinear Mechanics.

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Authors and Affiliations

  1. State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

    Wei Liu

  2. Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences (CAS), Beijing, 100190, China

    Wei Liu

  3. State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

    Yong Huan, Jie Dong & Yujing Dai

  4. Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences (CAS), Beijing, 100190, China

    Ding Lan

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  1. Wei Liu
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  2. Yong Huan
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  3. Jie Dong
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  4. Yujing Dai
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  5. Ding Lan
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Correspondence to Yong Huan.

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Liu, W., Huan, Y., Dong, J. et al. A correction method of elastic modulus in compression tests for linear hardening materials. MRS Communications 5, 641–645 (2015). https://doi.org/10.1557/mrc.2015.76

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