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.
| Translated title of the contribution | Impact-induced initiation criteria of PTFE/Al by split Hopkinson pressure bar |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 957-965 |
| Number of pages | 9 |
| Journal | Baozha Yu Chongji/Expolosion and Shock Waves |
| Volume | 38 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 25 Sept 2018 |