Mechanical property of metallic foams under dynamic tension with constant high strain rate

ZHANG Xiaoyang; TAN Shifeng; LIU Zeyu; ZHAO Piao

doi:10.11883/bzycj-2023-0128

Volume 44 Issue 1

Jan. 2024

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ZHANG Xiaoyang, TAN Shifeng, LIU Zeyu, ZHAO Piao. Mechanical property of metallic foams under dynamic tension with constant high strain rate[J]. Explosion And Shock Waves, 2024, 44(1): 013105. doi: 10.11883/bzycj-2023-0128

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ZHANG Xiaoyang, TAN Shifeng, LIU Zeyu, ZHAO Piao. Mechanical property of metallic foams under dynamic tension with constant high strain rate[J]. Explosion And Shock Waves, 2024, 44(1): 013105. doi: 10.11883/bzycj-2023-0128

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Mechanical property of metallic foams under dynamic tension with constant high strain rate

doi: 10.11883/bzycj-2023-0128

1.
Department of Mathematics and Physics, University of South China, Hengyang 421001, Hunan, China
2.
School of Civil Engineering, University of South China, Hengyang 421001, Hunan, China

Received Date: 2023-04-10
Rev Recd Date: 2023-10-25

Available Online: 2023-11-07

Publish Date: 2024-01-11

Abstract

Abstract

In order to explore the dynamic behavior of metallic foams under the stretch of constant high strian rate, a few numerical simulations were conducted to explore the effects of both the height of specimen and the tensile velocity on the stress uniformity and deformation uniformity as well as the failure position of the specimen under dynamic tensile loading. And then, a feasible numerical simulation scheme was proposed to obtain dynamic tensile properties of metallic foams under dynamic tension loading with constant strain rates. According to this scheme, the max strain rate reaches 5000 s⁻¹ by means of both decreasing the height of specimen to 1.55 times of the cells’ equivalent diameter and stretching the specimen in two opposite directions with the same velocity. The scheme was verified to be rational by these four main requirements: the stress uniformity and deformation uniformity of the specimen, the acceptable failure position of the specimen and good repeatability. Employing this scheme, a series of dynamic tensile simulations were carried out to investigate the effect of the strain rate on the dynamic tensile mechanical properties of metallic foams. Results show that the failure strain of metallic foams is almost independent of the strain rate in the range from 0.5 s⁻¹ to 5000 s⁻¹, and the failure stress of metallic foams is slightly affected by strain rate in the range from 0.5 s⁻¹ to 500 s⁻¹, but increases linearly with the strain rate in the range from 500 s⁻¹ to 5000 s⁻¹.
- constant high strain rate,
- dynamic tension,
- metallic foam,
- failure behavior

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References

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