Thermal buckling analysis of shear deformable （剪切变形的热屈曲分析）.pdf

Steel and Composite Structures, Vol. 12, No. 2 (2012) 129-147 129 Thermal buckling analysis of shear deformable laminated orthotropic plates by differential quadrature 1 2 S. Moradi* and Mohammad Hassan Mansouri 1Mechanical Engineering Department, Shahid Chamran University, Ahvaz, 61355, Iran 2NIGC, Isfahan, P.O.Box 85865- 1111, Iran (Received August 06, 2010, Revised November 10, 2010, Accepted November 16, 2011) Abstract. In this paper, the thermal buckling analysis of rectangular composite laminated plates is investigated using the Differential Quadrature (DQ) method. The composite plate is subjected to a uniform temperature distribution and arbitrary boundary conditions. The analysis takes place in two stages. First, pre- buckling forces due to a temperature rise are determined by using a membrane solution. In the second stage, the critical temperature is predicted based on the first-order shear deformation theory. To verify the accuracy of the method, several case studies were used and the numerical results were compared with those of other published literatures. Moreover, the effects of several parameters such as aspect ratio, fiber orientation, modulus ratio, and various boundary conditions on the critical temperature were examined. The results confirm the efficiency and accuracy of the DQ method in dealing with this class of engineering problems. Keywords: thermal buckling; differential quadrature; shear deformation theory; composite plates. 1. Introduction Laminated composites, which have high strength-to-weight and stiffness-to-weight ratios and diversity, have been used extensiv