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91.
本文是文[1,2]工作的继续,给出了非完善正交异性复合矩形板在面内双向压缩作用下后屈曲平衡路径渐近表达式。 相似文献
92.
圆柱正交异性体三维弹性问题的一个解法 总被引:1,自引:0,他引:1
本文从三维弹性力学基本方程出发,导出了圆柱正交异性体三维弹性静、动态问题的状态方程,并进而求得以位移表达的控制方程.还对横观各向同性体的轴对称问题给出了一个完备闭合解.文中算例计算了一个横观各向同性组合圆柱体的轴对称问题. 相似文献
93.
94.
Further improvement on fundamental solutions of plane problems for orthotropic materials 总被引:4,自引:0,他引:4
On the basis of the ecisting fundamental solutions of displacements, further improvement is made, and then the general fundamental
solutions of both plane elastic and plane plastic problems for orthotropic materials are obtained. Two parameters based on
material constants α1 = α1 are used to derive the relevant expressions in a real variable form. Additionally an analytical method of solving the singular
integral for the internal stresses is introduced, and the corresponding results are given. If α1 = α1 = 1, all the expressions obtained for orthotropy can be reduced to the corresponding ones for isotropy. Because all these
expressions and results can be directly used for both isotropic problems and orthotropic problems, it is convenient to use
them in engineering with the boundary element method (BEM). 相似文献
95.
The effectiveness of a new photomechanical-numerical hybrid method for evaluating stress intensity factors (SIFs) in orthotropic
composites is demonstrated. Reliable results are obtained from few moiré-measured displacements and they originate well away
from the crak tip. The method is illustrated for the case of a uniaxially loaded orthotropic glass/epoxy composite containing
a central, transverse crack. 相似文献
96.
97.
本文给出了计算复杂渗流场的简化方法.首先由加权余量法得到变系数渗流问题的积分方程.再将区域及边界剖分,对各单元使用形心处的渗透系数而化为正交各向异性问题.最后用正交各向异性问题的基本解,得到对应于边界单元法的线性代数方程组.算例表明方法可靠. 相似文献
98.
本文采用Laplace-Fourier联合变换及传递矩阵方法导出了正交各向异性层状弹性半平面动力问题的时域奇异解的解析表达式,讨论了奇异解的数值实施。并把奇异解应用于边界元,计算了地下直墙拱结构的动力响应问题。 相似文献
99.
This paper addresses the class of stress–strain problems for thin orthotropic cylindrical shells of arbitrary cross section under centrifugal loads. Separating out the variables for a simply supported shell yields a system of ordinary differential equations for which the boundary-value problem is solved by a stable numerical method. Study is made of the distribution of displacements in shells of elliptical cross section versus the ratio of ellipse exes and the eccentricity of the axis of revolution relative to the geometrical axis of symmetry 相似文献
100.
For the thermoelastic dynamic axisymmetric problem of a finite orthotropic hollow cylinder, one comes closer to reality to
involve the effect of axial strain than to consider the plane strain case only. However, additional mathematical difficulties
should be encountered and a different solution procedure should be developed. By the separation of variables, the thermoelastic
axisymmetric dynamic problem of an orthotropic hollow cylinder taking account of the axial strain is transformed to a Volterra
integral equation of the second kind for a function of time, which can be solved efficiently and quickly by the interpolation
method. The solutions of displacements and stresses are obtained. It is noted that the present method is suitable for an orthotropic
hollow cylinder with an arbitrary thickness subjected to arbitrary axisymmetric thermal loads. Numerical comparison is made
to show the effect of the axial strain on the displacements and stresses.
The project supported by the National Natural Science Foundation of China (10172075) and China Postdoctoral Science Foundation
(20040350712) 相似文献