Buckling optimization of variable thickness composite plates subjected to nonuniform loads

作     者：de Faria, AR de Almeida, SFM 

作者机构：Inst Tecnol Aeronaut Dept Mech Engn BR-12228901 Sao Jose Dos Campos SP Brazil 

出 版 物：《AIAA JOURNAL》 (美国航空航天学会志)

年 卷 期：2004年第42卷第2期

页      面：228-231页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

主　　题：PLATES (Engineering) COMPOSITE materials BUCKLING (Mechanics) STRUCTURAL analysis (Engineering) MATHEMATICAL optimization STRUCTURAL design 

摘      要：Optimization of heterogeneous composite aerospace structures that operate in a range of temperatures is considered. It is observed that heterogeneous composite plates optimized to operate at a fixed service temperature may perform poorly when that temperature is varied, that is, those plates may be highly sensitive to thermal loadings. A strategy is presented to obtain optimal designs of heterogeneous composite plates that operate within a given temperature range and under arbitrary mechanical loading, such that the significant and undesired sensitivity of these optimal designs to both thermal and mechanical loadings are effectively suppressed. It is assumed that the mechanical loading distribution is arbitrarily piecewise linear and that the operating temperature is within a specified range. Hence, the applied loadings are uncertain or not fixed in nature. Results for heterogeneous composite plates demonstrate the effectiveness of the strategy proposed and the danger of utilizing composite designs sensitive to variations in the thermal and mechanical loadings.