Efficient Finite Element Formulation for Thermal Stress Analysis of Laminated Composite and Sandwich Plates
Publication: Journal of Aerospace Engineering
Volume 28, Issue 4
Abstract
By introducing thermal expansion coefficients in the transverse displacement field, this paper proposes an approach to improve the performance of the global-local higher-order theory for thermal stress analysis of laminated composite plates. Transverse normal deformation has been considered in the proposed model, whereas the additional displacement variables have not increased because thermal loads could be included in the generalized force vector. The proposed model a priori satisfies the continuity conditions of transverse shear stresses at interfaces, and the number of displacement variables involved in the present model is independent of the number of layers. The derivatives of transverse displacement have been eliminated from the displacement field so that the interpolation functions are only required for the finite-element implementation. Based on the proposed model, a six-node triangular element is proposed for thermal expansion problems of laminated composite and sandwich plates. Numerical results show that the proposed model can produce a more accurate response of laminated composite plates under temperature loads than other models.
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Acknowledgments
The work described in this paper was supported by the National Natural Sciences Foundation of China (No. 11272217) and the Program for Liaoning Excellent Talents in University (LR201033).
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Published In
Journal of Aerospace Engineering
Volume 28 • Issue 4 • July 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 27, 2012
Accepted: Jun 30, 2014
Published online: Aug 14, 2014
Discussion open until: Jan 14, 2015
Published in print: Jul 1, 2015
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