Analysis on stress uniformity of viscoelastic materials in split Hopkinson bar tests

ZHU Jue; HU Shi-sheng; WANG Li-li; 

doi:10.11883/1001-1455(2006)04-0315-08

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ZHU Jue, HU Shi-sheng, WANG Li-li, . Analysis on stress uniformity of viscoelastic materials in split Hopkinson bar tests[J]. Explosion And Shock Waves, 2006, 26(4): 315-322. doi: 10.11883/1001-1455(2006)04-0315-08

Citation:

ZHU Jue, HU Shi-sheng, WANG Li-li, . Analysis on stress uniformity of viscoelastic materials in split Hopkinson bar tests[J]. Explosion And Shock Waves, 2006, 26(4): 315-322. doi: 10.11883/1001-1455(2006)04-0315-08

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Analysis on stress uniformity of viscoelastic materials in split Hopkinson bar tests

doi: 10.11883/1001-1455(2006)04-0315-08

1.
Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China;
2.
Mechanics and Material Science Research Center, Ningbo University, Ningbo 315211, Zhejiang, China

Publish Date: 2006-07-25

Abstract

Abstract

By using characteristics method of wave propagation, the SHPB tests for the so-called ZWT viscoelastic materials are numerically studied to explore how the basic assumption of uniform distribution of stress along the length of specimen can be satisfied. It is found that the material parameters such as the relaxation time 2 and the transient wave impedance ratio Ri, as well as the rise time of incident wave all strongly influence the stress uniformity, the strain uniformity and the average strain rate of the tested specimen. Results may provide theoretical bases for the design of a dynamic test for viscoelastic material.
- solid mechanics,
- stress uniformity,
- characteristics method,
- viscoelastic,
- high strain rates,
- SHPB