期刊
COMPOSITE STRUCTURES
卷 172, 期 -, 页码 173-189出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2017.03.051
关键词
Composite sandwich plate; Foam-filled corrugated core; Refined shear theory; Thermal loading
资金
- National Natural Science Foundation of China [11472209, 51375369, 11472208]
- China Postdoctoral Science Foundation [2016M600782]
- Postdoctoral Scientific Research Project of Shaanxi Province [2016BSHYDZZ18]
- Fundamental Research Funds for Xi'an Jiaotong University [xjj2015102]
The free vibration and buckling behaviors of foam-filled composite corrugated sandwich plates under thermal loading are investigated theoretically. A refined shear deformation theory is extended incorporating two different combinations of hyperbolic and parabolic shear shape functions. Equivalent thermoelastic properties of the foam-filled corrugation are obtained using the method of homogenization based on the Gibbs free energy. Based on hyperbolic-polynomial variation of all displacements across the thickness of both face sheets and sandwich core, the shear plate theory accounts for both transverse shear and thickness stretching effects. The theoretical predictions are validated against existing results as well as finite element simulations. The effects of geometric and material parameters on natural frequency and critical temperature change for buckling are systematically investigated. The proposed theory is not only accurate but also simple in predicting the free vibration and thermal buckling responses of composite sandwich plates with foam-filled corrugated cores. (C) 2017 Elsevier Ltd. All rights reserved.
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