Journal
MATERIALS & DESIGN
Volume 100, Issue -, Pages 92-101Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2016.03.090
Keywords
Sandwich structure; Polyethylene; Impact response; Failure mechanisms
Categories
Funding
- Foundation of State Key Laboratory of Explosion Science and Technology of China [KFJJ13-1Z]
- Natural Science Foundation of China [11102023, 11172071]
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Ballistic tests were performed on two types of polyethylene core sandwich structures (AA6082/LDPE/AA6082 and AA6082/UHMWPE/AA6082) to investigate their perforation resistance. Bulging and dishing deformation of layered plates were compared under low-velocity impact by hemispherical-nosed projectiles. Different impact failure mechanisms leading to perforation were revealed for laminates composed of a pair of aluminum alloy face sheets separated by a polyethylene interlayer. Using the finite element code Abaqus/Explicit, the perforation behavior and distribution of energy dissipation of each layer during penetration were simulated and analysed. The deformation resistance and anti-penetration properties of polyethylene core sandwich structures were compared with those of monolithic AA6082-T6 plates that had the same areal density. Although the polyethylene interlayer enlarged the plastic deformation zone of the back face, the polyethylene core sandwich structure was a little less effective than the monolithic Al alloy target at resisting hemispherical-nosed projectile impact. (C) 2016 Elsevier Ltd. All rights reserved.
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