共查询到10条相似文献,搜索用时 46 毫秒
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A. G. Kolpakov 《Journal of Applied Mechanics and Technical Physics》2003,44(2):290-297
The problem of design of laminated plates with specified stiffness and strength characteristics is considered. The starting design problem is reduced to the convexcombination problems, which is solved by the convolution method. The following design problems are solved: design with allowance for strength, design of a laminated plate of unconstrained thickness, and design for approximately specified characteristics. 相似文献
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本文首先选取对故障比较敏感,又能反映结构动力学特性的频响函数作为诊断故障的参数。通过计算无损板在给定模态下各单元的模态能量,求得每个单元对该阶模态下全板能量的贡献,并由模态实验得到损伤前后频响函数在各阶共振峰处的变化。分析发现两者之间存在内在联系,从而得到一种分析小损伤位置和范围的新方法。 相似文献
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提出一种新的八节点平板元用于分析复合材料叠层厚板的静力问题,板的位移场在板面内采用抛物线型插值,而在板厚方向采用Maclaurin级数展开,使得厚度方向的插值为任意阶多项式,相当于厚板中的高阶理论,取不同的级数项数,可得到不同精度的解。该单元满足C^0连续条件,不需增加新的网络,也不需增加新的输入数据,只要增加多项式级数的项数,便可得到较高精度的解。文中研究了算法的收敛性及计算精度,并与已有结果作了比较。 相似文献
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基于高阶剪切变形理论,突出考虑横向正应变和横向剪切应变的影响,对受热和外力联合作用下复合材料层合板的非线性静、动态响应进行分析。动态分析时计及了转动惯量的影响,给出了C°类有限元公式。文中数值算例同现有文献和三维有限元计算结果进行了比较,证明了本文方法的精确、有效性。文中还对层合反的边界条件、纵厚比及铺设角度对非线性动态响应的影响进行了分析。 相似文献
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本文采用一种新的半解析法,即独特利用Heaviside函数建立与加筋板等效的变刚度模型来开展复合材料双向正交加筋板在横向载荷下的弯曲挠度分析.此模型可以准确地描述筋条在板面上的分布,以及由于筋条的存在而导致的板面刚度不均匀分布.使用Galerkin加权残值法求解该模型的控制方程,得到不同边界条件和载荷情况下的级数解.对于双向正交加筋板,将此半解析法的结果与传统均匀化方法和使用商业有限元软件ABAQUS建立的有限元模型所得到的弯曲挠度结果比较,验证了此方法的准确性和优越性.不同于传统均匀化方法,本双向正交加筋板的弯曲挠度半解析法可精确、有效地获取加筋间的局部弯曲挠度,可以促进复合材料结构的设计分析与优化的研究进展. 相似文献
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OPTIMUM DESIGN OF ADHESIVE BONDING OFRESIN-BASE COMPOSITES 总被引:1,自引:0,他引:1
I.IntroductionThemajorityofproductsofthefiberreinforcedcompositemateria1sareinthin-walIstructure.Themeritsofcompositesmaybefullyplayedbytheadhesivebonding.Theadhesivebondinghasfollowingadvantages:a.thejointofthesameordifferentkindsofmaterialsmayberealized… 相似文献
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A. H. England 《Journal of Elasticity》2006,82(2):129-173
A procedure has been developed in previous papers for constructing exact solutions of the equations of linear elasticity in a thick plate of inhomogeneous isotropic linearly elastic material in which the elastic moduli depend in any specified manner on a coordinate normal to the plane of the plate. The essential idea is that any solution of the classical thin plate or classical laminate theory equations (which are two-dimensional theories) generates, by straightforward substitutions, a solution of the three-dimensional elasticity equations for the homogeneous material. Recently this theory has been formulated in terms of functions of a complex variable. It was shown that the displacement and stress fields in the inhomogeneous material could be expressed in terms of four complex potentials that are analytic functions of the complex variable ζ = x + iy in the mid-plane of the plate. However, the analysis performed so far applies only to the case of a plate with traction-free upper and lower faces. The present paper extends these solutions to the case where the plate is bent by a pressure distribution applied to a face. 相似文献