Investigation of the Stability Problems of Elastic Bodies Using the Method of Mathematical Theory of Elasticity

In this paper,using the equilibrium equations and boundary conditionsof elastic stability problem of Новожилов and the method of mathematicaltheory of elasticity,we solve some elastic stability problems,which werestudied byищлинскииandвоицеховская,and obtained more reason-able results than theirs.     

边界元法在求解复合材料力学问题中的应用

本文讨论了边界元法在求解复合材料的微观力学、宏观力学和结构力学问题中的应用,并指出边界元法用于分析复合材料及其结构的力学问题的优点和局限性。      

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 orthoiropic surfaces.The critical point is determined and the postbuckling behaviour of the panel is studied.     

地震孕育发展过程中的力学问题

我国是一个多地震的国家,构造地震,尤其是浅源构造地震的危害很大。地震的孕育发展过程,主要是与地壳的受力,变形,能量的逐步积累和集中,突然断裂和错动,释放应变能,发生地震及震后的调整等有...     

关于复合材料力学几个基本问题的研究

复合材料力学是一种两层次的力学理论，相（材料）通过复合（效应、工艺）形成复合材料。复合效应分为混合效应和协同效应，其相应的混合律和协同律是复合材料力学理论的奠基石，前者已形成理论体系，后者有待形成体系。本文所论及的随机扩大临界核理论可解释多种形式的协同效应。此外，本文还讨论了几个有关的力学问题。     

APPLICATION OF THE METHOD OF SPLIT RIGIDITIES TO ANlSOTROPIC LAMINATED SHALLOW SHELLS

In this paper,according to the method stated by Hu Hai-chang in [3],on the basis of [1],the method of split rigi-dities is generalized for the purpose of solving the problemsof lateral deflection,stability and lateral vibration foranisotropic laminated shallow shells.and a simple and prac-tical approximate method is obtained.in which the errors andcomputing work are comparatively small.     

加筋圆柱曲板承载能力计算和实验结果比较

本文用文献[1]的方法,对文献[2,3,7]中的一百多个在轴压、侧压和剪切载荷作用下的加筋圆柱曲板试件,作了承载能力的计算,和所引文献的实验结果作比较表明,在绝大多数情况下,符合良好,说明这种方法有效,具有实用价值。     

关于大型浮顶式油罐的设计问题

本文探讨用16Mn钢材和相当于建造5万米~3浮顶式油罐的工艺水平,从力学上解决10万、30万、50万米~3浮顶式油罐的设计问题。1.按薄膜应力状态设计5万米~3的浮顶式油罐,贮存液体的侧向压力主要是靠罐壁周向受力来承受的。周向应力σ_θ=pR/t,其中P为液压,R为罐半径,t为壁厚。由于p是沿 ...     

A rigorous solution for the axisymmetrical buckling of simply supported cylindrical sandwich shells under axial load

In this paper,based on ref[1],the axisymmetrical buckling of simply supportedcylindrical sandwich shells under the action of uniform axial load is solved by a rigorousmethod.The classical theory of shells is used for the two face sheets and the core isconsidered as a three-dimensional elastic body.A series of transcendental equations areobtained,from which the critical loads can be calculated by numerical methods.Numericalexamples are given to compare with the solutions of sandwich shell theories.     

复合材料夹层扁壳的有限挠度方程和线性稳定问题

本文对表板采用Kirchhoff假设,考虑夹心沿厚度方向的剪切变形,用最小势能原理导了复合材料夹层扁壳的有限挠度方程和边界条件。作为一个特例,求解了矩形夹层圆柱壳在轴压(或侧压)作用下的线性稳定问题。