Impact-induced initiation criteria of PTFE/Al by split Hopkinson pressure bar

Wubuliaisan MAIMAITITUERSUN; GE Chao; TIAN Chao; DONG Yongxiang

doi:10.11883/bzycj-2017-0075

Volume 38 Issue 5

Jul. 2018

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Wubuliaisan MAIMAITITUERSUN, GE Chao, TIAN Chao, DONG Yongxiang. Impact-induced initiation criteria of PTFE/Al by split Hopkinson pressure bar[J]. Explosion And Shock Waves, 2018, 38(5): 957-965. doi: 10.11883/bzycj-2017-0075

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Wubuliaisan MAIMAITITUERSUN, GE Chao, TIAN Chao, DONG Yongxiang. Impact-induced initiation criteria of PTFE/Al by split Hopkinson pressure bar[J]. Explosion And Shock Waves, 2018, 38(5): 957-965. doi: 10.11883/bzycj-2017-0075

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Impact-induced initiation criteria of PTFE/Al by split Hopkinson pressure bar

doi: 10.11883/bzycj-2017-0075

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Received Date: 2017-03-14
Rev Recd Date: 2017-07-12
Publish Date: 2018-09-25

Abstract

Abstract

Impact-induced initiation criteria of Al particles reinforced PTFE (PTFE/Al) prepared by compression/sintering were studied by split Hopkinson pressure bar (SHPB) and high speed photography in this work. SHPB systems comprising of either steel or aluminum bars were applied to test PTFE/Al samples of different dimensions, in order to study the effect of the impact stress and the loading strain rate on the impact-induced initiation behaviors of PTFE/Al. It shows that the impact-induced initiation process of PTFE/Al mainly includes the deformation, fragmentation and reaction, which is simultaneously related to the impact stress and the loading strain rate. Based on the experimental results, the criteria of impact stress and loading strain rate for the impact-induced initiation of PTFE/Al have been obtained. Moreover, an analytical expression of impact-induced initiation criteria including impact stress and loading strain rate was established and a theoretical curve was predicted for the impact-induced initiation events of PTFE/Al under SHPB tests.
- PTFE/Al,
- split Hopkinson pressure bar,
- impact-induced reaction,
- reaction criteria

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References(24)

References

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