題 目：複合層板之熱挫屈分析
研 究 生：陳證元
指導教授：蕭樂群

本文基於一階剪力應變形理論，以36個自由度之高階三角形板元素為基礎，探討含剪力變形的對稱角交(angle ply)及對稱正交(cross ply)複合層板，在承受均勻溫度分佈場下的熱挫屈行為。由於層板疊層順序的不同，使得在x、y方向產生彎曲勁度的差異，其對挫屈模態轉變的形式及臨界挫屈溫度變化的影響效應相當明顯。文中以正交層板在不同的疊層順序的簡支撐與固定邊界情況下，探討長寬比的不同對挫屈模態轉變及臨界挫屈溫度變化的影響。並探討角交層板在不同的疊層順序、長寬比及纖維角度對挫屈模態及臨界挫屈溫度變化的影響。結果顯示正交層板，在不同的疊層順序及邊界條件下，隨長寬比的不同對挫屈模態及臨界挫屈溫度變化有不同的影響。而角交層板在不同的疊層順序及邊界條件下，其長寬比、纖維角度對挫屈模態及臨界挫屈溫度變化的影響亦有相當密切的關係。

Subject ：Thermal Buckling Analysis Of Composite Laminates
Student ：Cheng-Yuan Chen
Adviser ：Le-Chung Shiau
In this thesis, by using the first order shear deformation plate theory, a 36 degree-of-freedom high precision, high order triangular plate element we are going to study the thermal buckling behave of angle ply and cross ply composite laminate with shear deformation analysis of composite plates under a uniformly distributed temperature field. Since the sequence of lamina is different, there may be error in bending stiffness both in the direction of x and y, which would seriously change the buckling mode and critical temperature. In this study, a simply supported cross ply laminate with various sequences are considered, and we are going to investigate relation between aspect ratio and the buckling mode and critical temperature. Besides, we would also focus on the bucking mode and critical temperature of angle ply laminate under various sequences, aspect ratios and the fiber angles. The result shows that in the cross ply laminate, under different sequences and boundary conditions, the buckling mode and critical temperature would change with different aspect ratio. In cross ply laminate, under different sequences and boundary conditions, there is a close relationship between the aspect ratio, fiber angle, buckling mode and critical temperature.

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