| Issue |
DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
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| Page(s) | 1399 - 1405 | |
| Section | Constitutive Modeling | |
| DOI | https://doi.org/10.1051/dymat/2009197 | |
| Published online | 15 September 2009 | |
DOI: 10.1051/dymat/2009197
The dynamic compressible and shear responses of reactive materials-PTFE/Al
P. Zhao1, F. Lu1, J. Li1, Y. Lin1, R. Chen1, S. Xu2 and S. Yang21 College of Science, National Univ. of Defense Technology, Changsha 410073, Hunan, China
2 College of Aerospace and Material Engineering, National Univ. of Defense Technology, Changsha 410073, Hunan, China
Published online: 15 September 2009
Abstract
Using SHPB and punch experimental techniques, we investigated the dynamic compressive and shear responses of PTFE/Al reactive materials. There were two PTFE/Al for the experiments, PA265 and PA35, in which the proportions of Al powder were 26.5% and 35% respectively. The SHPB experimental results show that two kinds of PTFE/Al are sensitive to strain-rates. At strain rate 1000 s−1 ~ 8000 s−1, the yield stress of PA265 is 32 ~ 44 MPa, and 44 ~ 55 MPa for PA35. The critical reaction stress is 157 MPa for PA265 and 163 MPa for PA35. The dynamic punch experimental results show that samples undergo not only shearing deformation, but also tension deformation, which is consistent with the shear stress-strain curve. The dynamic shear strength of PA265 is a little less than that of PA35.
© EDP Sciences 2009