Rail-guided static/dynamic biaxial tensile test technique

LIU Dongsheng; SHI Tongya; XIE Puchu; CHEN Wei; WANG Yonggang

doi:10.11883/bzycj-2020-0138

Volume 41 Issue 6

Jun. 2021

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LIU Dongsheng, SHI Tongya, XIE Puchu, CHEN Wei, WANG Yonggang. Rail-guided static/dynamic biaxial tensile test technique[J]. Explosion And Shock Waves, 2021, 41(6): 064101. doi: 10.11883/bzycj-2020-0138

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LIU Dongsheng, SHI Tongya, XIE Puchu, CHEN Wei, WANG Yonggang. Rail-guided static/dynamic biaxial tensile test technique[J]. Explosion And Shock Waves, 2021, 41(6): 064101. doi: 10.11883/bzycj-2020-0138

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Rail-guided static/dynamic biaxial tensile test technique

doi: 10.11883/bzycj-2020-0138

1.
Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, Zhejiang, China
2.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2020-05-07
Rev Recd Date: 2020-09-02

Available Online: 2021-05-13

Publish Date: 2021-06-05

Abstract

Abstract

Based on the Zwick HTM-5020 hydraulic servo high-speed loading system, a planar biaxial tensile test technique was developed. The biaxial tensile loading device is mainly composed of a cross-shaped cone hammer head, a loading force arm, a cross guide slide rail, and a sample clamping guide rod. The driving force in the vertical direction of the loading hammer is transformed into the horizontal driving force by using the cone contact method, so as to realize the plane biaxial loading of the cruciform specimen. The contact angle of the cone surface and the cruciform specimen geometry was optimized using an Abaqus FEM code. The simulation results show that: (1) when the contact cone angle is 45 °, the horizontal driving conversion efficiency is better and the contact force is smaller than those of others, so that the components loaded by the horizontal driving within the elastic deformation range can be used repeatedly; (2) the key parameters of the cruciform specimen, such as the number of the slits in the loading arm, the length of the slit edge and thinning area, and the thickness of the gauge section, are obtained, so as to realize the uniform deformation of the cruciform specimen in the gauge section. A guide rod integrated measuring force-clamping specimen and a noncontact digital image correlation technique for the measurement of strain were employed in the planar biaxial tensile test device. By using the planar biaxial tensile loading device, the uniaxial tensile test and laser detection synchronicity verification experiment of aluminum alloy plate were carried out to verify the feasibility of the device design. The biaxial tensile tests of the aluminum alloy plates under different strain rates were performed, and the stress-strain curves of the 2024-T351 aluminum alloy sheet under biaxial loading were obtained, which were compared with the results under uniaxial tensile loading.
- biaxial tension,
- cruciform specimen,
- anisotropic mechanical behavior,
- 2024-T351 aluminum alloy sheet

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References(28)

References

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