Journal
COMPOSITE STRUCTURES
Volume 173, Issue -, Pages 242-254Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2017.04.037
Keywords
Honeycomb; Sandwich panels; Functionally graded materials; Blast loading
Categories
Funding
- National Natural Science Foundation of China [11572214, 11402163, 11602161]
- Natural Science Foundation of Shanxi Province [201601D021025]
- State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body [31615008]
- Foundation for the Top Young Academic Leaders of Shanxi
- Program for the Homecomings Foundation
- Outstanding Innovative Teams of Higher Learning Institutions of Shanxi
- State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) [KFJJ13-2Z]
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Sandwich panels with triple layered graded honeycomb cores were tested under blast loading. The structural response was analyzed by using finite element software LS-DYNA after validation against the experiments. The structural deformation modes were classified into three types and the core layer deformation was divided into three regions. For the same value of impulse, a localized impulse led to severely localized deformation mode. A relatively evenly distributed impulse resulted in largely global bending deformation. Under the same loading, graded panels with the core of the largest relative density placed near the impact face suffered a smaller deflection than the panels with uniform core. Furthermore, for the same deformation mode the normalized back face sheet deflection increased linearly with impulse. (C) 2017 Elsevier Ltd. All rights reserved.
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