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Guo Y, Du B, Liu H, et al. Electromagnetic Hopkinson bar: A powerful scientific instrument to study mechanical behavior of materials at high strain rates. Rev Sci Instrum. 2020;91(8):081501doi: 10.1063/5.0006084.
Guo, Y., Du, B., Liu, H., Ding, Z., Zhao, Z., Tang, Z., Suo, T., & Li, Y. (2020). Electromagnetic Hopkinson bar: A powerful scientific instrument to study mechanical behavior of materials at high strain rates. The Review of scientific instruments, 91(8), 081501. https://doi.org/10.1063/5.0006084
Guo, Yazhou, et al. "Electromagnetic Hopkinson bar: A powerful scientific instrument to study mechanical behavior of materials at high strain rates." The Review of scientific instruments vol. 91,8 (2020): 081501. doi: https://doi.org/10.1063/5.0006084
Guo Y, Du B, Liu H, Ding Z, Zhao Z, Tang Z, Suo T, Li Y. Electromagnetic Hopkinson bar: A powerful scientific instrument to study mechanical behavior of materials at high strain rates. Rev Sci Instrum. 2020 Aug 01;91(8):081501. doi: 10.1063/5.0006084. PMID: 32872966.
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Rev Sci Instrum. 2020 Aug 01;91(8):081501. doi: 10.1063/5.0006084.

Electromagnetic Hopkinson bar: A powerful scientific instrument to study mechanical behavior of materials at high strain rates.

The Review of scientific instruments

Yazhou Guo, Bing Du, Huifang Liu, Zhupan Ding, Zhenqiang Zhao, Zhongbin Tang, Tao Suo, Yulong Li

Affiliations

  1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China.

PMID: 32872966 DOI: 10.1063/5.0006084

Abstract

The split Hopkinson bar (SHB) has been widely used for testing the dynamic mechanical behavior of materials. However, it is hard to involve complex stress conditions in traditional SHB due to its intrinsic characteristics. The Electromagnetic Hopkinson bar (E-Hopkinson bar) has been recently proposed as a solution. Different from the traditional SHB, the stress pulse of the E-Hopkinson bar is generated directly by the electromagnetic force. Therefore, the stress pulse that loads the specimen can be accurately controlled. With this advantage, some experiments that cannot be done with traditional SHB can be conducted by the E-Hopkinson bar technique. In this review, we introduced briefly the basic principles of the E-Hopkinson bar. Some lasted tests, such as symmetrically dynamic compression/tension of materials, interlaminar fracture of composites, dynamic Bauschinger effect of metals, intermediate strain rate tests, and dynamic multi-axial tests were also introduced. This new technique will be helpful for those researchers in the field of solid mechanics, especially when the strain rate and complex stress condition are involved.

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