An experimental study on dynamic mechanical property ofultra-light aluminum foam under high temperatures

Wang Peng-fei; Xu Song-lin; Li Zhi-bin; Hu Shi-sheng

doi:10.11883/1001-1455(2014)04-0433-06

Volume 34 Issue 4

Sep. 2014

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Wang Peng-fei, Xu Song-lin, Li Zhi-bin, Hu Shi-sheng. An experimental study on dynamic mechanical property ofultra-light aluminum foam under high temperatures[J]. Explosion And Shock Waves, 2014, 34(4): 433-438. doi: 10.11883/1001-1455(2014)04-0433-06

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An experimental study on dynamic mechanical property ofultra-light aluminum foam under high temperatures

doi: 10.11883/1001-1455(2014)04-0433-06

CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, Anhui, China

Funds: Supported bythe National Natural Science Foundation of China (90916026)

More Information

Corresponding author: Xu Song-lin, slxu99@ustc.edu.cn
Received Date: 2012-12-10
Rev Recd Date: 2013-04-12
Publish Date: 2014-07-25

Abstract

Abstract

An improved split Hopkinson pressure bar device was applied and a direct impact Hopkinson experimental program with long bullets was designed to measure the dynamic properties of closed-cell aluminum foam under high temperatures. Stress-time curves of both ends of aluminum foam specimens were obtained. It is found that the temperature markedly influence the stress uniformity of the specimens. As the temperature increases, the stress non-uniformity in the specimen becomes serious under the same impact velocity. Thus, both the increment in the test temperature and the impact velocity will cause stress non-uniformity of aluminum foam specimens. For aluminum foams, homogeneous deformation mode is dominant when the impact velocity is low, and the meso-scopic deformation pattern may vary but the stress field of the foam specimen is macroscopically homogeneous. Finally, the SHPB experiment is used to obtain the stress-strain curve under high temperature and high strain rate, after ensuring homogeneous deformation of the specimen.
- solid mechanics,
- stress uniformity,
- Hopkinson bar,
- ultra-light aluminum foam,
- high temperature,
- dynamic

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References(15)

References

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