Nonlinear delamination buckling and expansion of functionally graded laminated piezoelectric composite shells |
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Institution: | 1. School of Naval Architecture, Ocean and Civil Engineering (State Key Laboratory of Ocean Engineering), Shanghai Jiaotong University, Shanghai 200240, PR China;2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore |
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Abstract: | In this paper, an analytical method is presented to investigate the nonlinear buckling and expansion behaviors of local delaminations near the surface of functionally graded laminated piezoelectric composite shells subjected to the thermal, electrical and mechanical loads, where the mid-plane nonlinear geometrical relation of delaminations is considered. In examples, the effects of thermal loading, electric field strength, the stacking patterns of functionally graded laminated piezoelectric composite shells and the patterns of delaminations on the critical axial loading of locally delaminated buckling are described and discussed. Finally, the possible growth directions of local buckling for delaminated sub-shells are described by calculating the expanding forces along the length and short axis of the delaminated sub-shells. |
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Keywords: | Functionally graded composite shells Piezoelectric layer Delaminated buckling Electric field Thermal loading |
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