A high-strain-rate shear testing method based on the DIHPB technique

LIU Yu; XU Zejian; TANG Zhongbin; ZHANG Weiqi; HUANG Fenglei

doi:10.11883/bzycj-2018-0301

Volume 39 Issue 10

Oct. 2019

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LIU Yu, XU Zejian, TANG Zhongbin, ZHANG Weiqi, HUANG Fenglei. A high-strain-rate shear testing method based on the DIHPB technique[J]. Explosion And Shock Waves, 2019, 39(10): 104101. doi: 10.11883/bzycj-2018-0301

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LIU Yu, XU Zejian, TANG Zhongbin, ZHANG Weiqi, HUANG Fenglei. A high-strain-rate shear testing method based on the DIHPB technique[J]. Explosion And Shock Waves, 2019, 39(10): 104101. doi: 10.11883/bzycj-2018-0301

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A high-strain-rate shear testing method based on the DIHPB technique

doi: 10.11883/bzycj-2018-0301

1.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
2.
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China

Received Date: 2018-08-15
Rev Recd Date: 2018-12-20

Available Online: 2019-09-25

Publish Date: 2019-10-01

Abstract

Abstract

Compared to the split Hopkinson pressure bar (SHPB) technique, the direct impact Hopkinson pressure bar (DIHPB) method can usually obtain a higher strain rate in dynamic tests of material properties. Based on the DIHPB system, a new double shear specimen was used to measure the shear stress-shear strain curves of 603 steel at strain rates ranging from 1 500 s⁻¹ to 33 000 s⁻¹. Through comparison with the testing results achieved in a SHPB system, it is found that the flow stresses determined by the two methods have a good consistency, but a difference exists in the rising parts of the flow stress curves. Numerical simulation was carried out to validate the DIHPB method, and the proper testing condition of this method was analyzed. With this method, it was observed that the flow stress of 603 steel showed an obvious strain rate effect. At higher loading speeds, however, the failure stress of the material presented a decreasing tendency with the increase of the loading speed.
- direct impact Hopkinson pressure bar (DIHPB),
- split Hopkinson pressure bar (SHPB),
- high strain rate,
- dynamic shear

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References(24)

References

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