A hybrid-stress solid-shell element for non-linear analysis of piezoelectric structures |
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Authors: | LinQuan Yao K Y Sze |
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Affiliation: | (1) School of Mathematical Science, Soochow University, Suzhou, 215006, China;(2) Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China |
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Abstract: | This paper presents eight-node solid-shell elements for geometric non-linear analyze of piezoelectric structures. To subdue
shear, trapezoidal and thickness locking, the assumed natural strain method and an ad hoc modified generalized laminate stiffness
matrix are employed. With the generalized stresses arising from the modified generalized laminate stiffness matrix assumed
to be independent from the ones obtained from the displacement, an extended Hellinger-Reissner functional can be derived.
By choosing the assumed generalized stresses similar to the assumed stresses of a previous solid element, a hybrid-stress
solid-shell element is formulated. The presented finite shell element is able to model arbitrary curved shell structures.
Non-linear numerical examples demonstrate the ability of the proposed model to analyze nonlinear piezoelectric devices.
Supported by the National Natural Science Foundation of China (Grant No. 10672111) and the Major Project of the Natural Science
Foundation of Jiangsu Province (Grant No. BK2006725) |
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Keywords: | piezoelectric structures solid-shell element hybrid-stress geometric non-linear |
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