Journal
COMPOSITE STRUCTURES
Volume 93, Issue 1, Pages 40-48Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2010.06.018
Keywords
Sandwich composite; PVC foam; Balsa wood; Impact; Damage
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This paper presents an experimental investigation on impact response of sandwich composite panels with PVC foam core and balsa wood core. A number of tests were performed under various impact energies. Damage process of the sandwich composites is analyzed from cross-examining load-deflection curves, energy profile diagrams and the damaged specimens. The primary damage modes observed are; fiber fractures at upper and lower skins, delaminations between adjacent glass-epoxy layers, core shear fractures, and face/core debonding. After visual inspection of the top and bottom face-sheets, initial examination, damage mechanisms at the interior layers and cores were ascertained through destructive analysis, i.e. sectioning by an abrasive water-jet machine, of samples. In addition to the single impacts, ;repeated impact response of the samples is also investigated. (C) 2010 Elsevier Ltd. All rights reserved.
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