单箱多室复合材料薄壁箱形梁的纯扭转分析  

Analysis of pure torsion for thin-walled composite mono-box beams with multi-cells

作　　者：刘斌[1] 叶贵如[1] 陈衡治[1] 张治成[1] 

机构地区：[1]浙江大学土木工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2005年第5期746-750,共5页Journal of Zhejiang University：Engineering Science

摘　　要：将单箱单室复合材料箱形梁纯扭转的分析方法拓展到单箱多室.结合经典的薄壁梁理论与复合材料理论,通过换算将层合材料离轴刚度等效为扭转刚度,对单箱中的各室建立剪力流方程,与扭矩平衡方程联立求解.通过算例将该方法与有限元法进行比较,各项应力的计算结果均相符,尤其是采用该方法计算得到的扭转产生的剪应力精度更高.采用该方法计算所得的各项应力均能满足实际工程设计的需要.The approach for pure torsional analysis of thin-walled composite box beams with single-cell was extended to ones with multi-cells. Based on the classical thin-walled beam theory and the composite theory, by transforming the off-axis stiffness of the composite structure into the equivalent torsional stiffness, equations of shear force flue for each cell-were established, and the general solutions were derived by incorporating the equilibrium equation of torsional moment. Numerical results of an example compared with that obtained by finite element method show that the present method has high accuracy and can yield satisfying results for engineering applications.

关 键 词：复合材料箱形薄壁梁 单箱多室 薄壁梁理论 层合材料理论 等效扭转刚度 

分 类 号：TB301[一般工业技术—材料科学与工程]