The finite deflection equations of anisotropic laminated shallow shells

In this paper, basing on ref. [1] we improved and extended that which is concerned with a view of investigating the finite deflection equations of anisotropic laminated shallow shells subjected to static loads, dynamic loads and thermal loads. We have considered the most general bending-stretching couplings and the shear deformations in the thickness direction, and derived the equilibrium equations, boundary conditions and initial conditions. The differential equations expressed in terms of generalized displacements u₀, ₀ and are obtained. From them, we could solve the problems of stress analysis, deformation, stability and vibration. For some commonly encountered cases, we derived the simplified equations and methods.     

分解刚度法在各向异性多层扁壳理论中的应用

本文按文献[3]中胡海昌阐述的方法,在文献[1]的基础上,将分解刚度法推广应用到各向异性多层扁壳的横向变形、稳定和横向振动问题上去,取得了简单实用、计算工作量和误差都较小的近似计算方法.     

第二届全国复合材料学术会议

由中国力学学会、中国航空学会和中国宇航学会联合举办的第二届全国复合材料学术会议于1982年8月18日至22日在哈尔滨召开。与会代表共计265名,收到论文报告230篇。会议分四个专题组宣读论文。四个专题组是:树脂基复合材料与工艺;板壳与优化设计;断裂疲劳性 ...     

复合材料的多层、夹层和加筋圆柱曲板的稳定和振动

本文在文献〔1,2〕的基础上,考虑了沿壳体厚度方向的剪切变形,探讨周边简支的纤维增强复合材料的正交各向异性的多层、夹层和加筋矩形圆柱曲板(与圆柱壳),在轴压、侧压和剪切(扭矩)作用下的临界载荷和横向振动固有频率的计算问题。在编成计算程序后,用一些算例将用文献〔1〕中的扁壳方程(Donnell壳体理论) 和文献〔3〕中的非扁壳方程(Love的壳体一阶近似理论) 算得的结果作了比较;将轴压下轴对称失稳和非轴对称失稳的临界载荷作了比较;将在轴压和侧压作用下失稳时外加筋曲板和内加筋曲板的临界载荷作了比较;将有薄膜力N_x~0和N_y~0同时和分别作用时与没有薄膜力作用时的横向振动固有频率作了比较;将按壳体的剪切变形理论和经典理论算得的临界载荷作了比较;将铺层情况对临界载荷的影响作了比较。     

THE FINITE DEFLECTION EQUATIONS OF ANISOTROPIC LAMINATED SHALLOW SHELLS

In this paper,basing on ref.[1]we improved andextended that Which is concerned with a view of inves-tigating the finite deflection equations of anisotro-pic laminated shallow shells subjected to static loads,dynamic loads and thermal loads.We have consideredthe most general bending-stretching couplings and theshear deformations in the thickness direction.and de-rived the equilibrium equations,boundary conditionsand initial conditions.The differential equationsexpressed in terms of generalized displacements u_o,υ_o,φ_x, φ_y and w are obtained.From them,we could solvethe problems of stress analysis,deformation,stabilityand vibration.For some commonly encountered cases,we derived the simplified equations and methods.     

Nonlinear stability analysis of a sandwich shallow cylindrical panel with orthotropic surfaces

In this paper, the large deflection theory is adopted to analyse the geometrical nonlinear stability of a sandwich shallow cylindrical panel with orthotropic surfaces. The critical point is determined and the postbuckling behaviour of the panel is studied.     

复合材料及其结构的非线性力学问题

本文根据最近文献及新近进展,讨论了复合材料及其结构的非线性力学问题,这是一个在实用上和理论上很重要并且越来越重要的问题。      

正交异性表层的夹层圆柱扁壳的非线性稳定性

本文采用大挠度理论,对正交各向异性表层的夹层扁壳进行了几何非线性的稳定性分析,求出了屈曲载荷并研究了后屈曲特性.     

Creep buckling of cross-ply symmetric laminated cylindrical panels

A creep buckling analysis of cross-ply symmetric laminated cylindrical panels is given in this paper.By means of theoretical analysis,a method to determine the critical load of creep buckling of the panels with simply supported boundary conditons is obtained.     

复合材料多层板壳有限元研究现状

复合材料常常以多层板、多层壳(夹层板和夹层壳可以看作多层板和多层壳的特例)的结构形式承载。复合材料板壳结构具有如下的特点: 1.非均质性首先,就每一层来说,都由两种或两种以上的材料构成,因而是非均质的。其次,不同层的纤维取向、纤维含量、厚度,甚至纤维种类和树脂种类都可能不同,因而不同的层更是非均质的。我们通常称前者为层内非均质性,后者为呈层性。