Journal
COMPOSITE STRUCTURES
Volume 67, Issue 3, Pages 289-298Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2004.07.012
Keywords
epoxy syntactic foam; split Hopkinson pressure bar (SHPB); temperature effects; strain rate; compressive properties; material model
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This research addresses effects of temperature, including adiabatic temperature rise in specimen during dynamic compression and environmental temperature, on the dynamic compressive properties of an epoxy syntactic foam. The adiabatic temperature rise in specimen during dynamic compression is found to be so small that its effects may be neglected. However, environmental temperature has significant effects on dynamic compressive behavior. With decreasing temperature, the foam initially hardens but then softens when below a transitional temperature, which are dominated by mechanisms of thermal-softening and damage-softening, respectively. A phenomenological material model accounting for both temperature and strain-rate effects has been developed, which well describes the compressive and failure behaviors at various strain rates and environmental temperatures. (C) 2004 Elsevier Ltd. All rights reserved.
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