Micro-inertia effect and dynamic plastic Poisson's ratio of metallic foams under compression

Wang Chang-feng; Zheng Zhi-jun; Yu Ji-lin

doi:10.11883/1001-1455(2014)05-0601-07

Volume 34 Issue 5

Dec. 2014

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Wang Chang-feng, Zheng Zhi-jun, Yu Ji-lin. Micro-inertia effect and dynamic plastic Poisson's ratio of metallic foams under compression[J]. Explosion And Shock Waves, 2014, 34(5): 601-607. doi: 10.11883/1001-1455(2014)05-0601-07

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Wang Chang-feng, Zheng Zhi-jun, Yu Ji-lin. Micro-inertia effect and dynamic plastic Poisson's ratio of metallic foams under compression[J]. Explosion And Shock Waves, 2014, 34(5): 601-607. doi: 10.11883/1001-1455(2014)05-0601-07

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Micro-inertia effect and dynamic plastic Poisson's ratio of metallic foams under compression

doi: 10.11883/1001-1455(2014)05-0601-07

CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, Anhui, China

Received Date: 2013-02-26
Rev Recd Date: 2013-10-17
Publish Date: 2014-09-25

Abstract

Abstract

The three-dimensional Voronoi technique and the explicit finite element method were utilized to investigate the micro-inertia effect and dynamic plastic Poisson's ratio of closed-cell and opencell metallic foams.The simulation results indicate that the plastic Poisson's ratio decrease with increasing nominal strain, the peak value of which decreases as the impact velocity increases.And the Poisson's ratio increases with the increasing of relative density.The micro-inertia plays little role in enhancing the plateau stress of metallic foams.The above simulation results can explain the existent experimental phenomenon that the crushing stress decreases with increasing loading rates, which is endured by the closed-cell aluminum foam under lateral constraint.
- solid mechanics,
- micro-inertia effect,
- three-dimensional Voronoi technique,
- metallic foam,
- closed-cell,
- open-cell,
- Poisson's ratio,
- longitudinal strain,
- crushing stress,
- loadingrate

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References(14)

References

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