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Three dimensional nonlinear BEM formulations for the mechanical analysis of nonhomogeneous reinforced structural systems

机译:三维非线性BEEM配方,用于非均匀加强结构系统的机械分析

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摘要

This study presents a coupling formulation for the mechanical modelling of nonhomogeneous reinforced 3D structural systems. The coupling of dissimilar reinforced materials and components provides efficient designs. Particularly, it enables high stiffness and low weight mechanical components, which are largely desired in several engineering applications. In the present study, the Boundary Element Method (BEM) mechanically represents 3D solids through elastic and viscoelastic approaches. The 1D truss BEM elements represent the reinforcements, which allow for elastoplastic behaviour. The sub-region BEM technique models the nonhomogeneous systems whereas connection 1DBEM elements allow for crossing reinforcements along materials interfaces. Bond-slip behaviour has been accounted in the formulation by a nonlinear scheme without special link elements. Different bond-slip laws can be accounted, which enables the mechanical modelling of different adherence behaviours. The proposed formulations are applied in the mechanical analysis of four complex 3D applications. The results achieved by the proposed formulations are compared against the responses of equivalent numerical methods and experimental results available in the literature. The proposed formulations lead to accurate and stable results. Besides, the applications complexity demonstrates it.
机译:该研究介绍了非均匀加强3D结构系统的机械建模的耦合配方。不同的增强材料和组件的耦合提供有效的设计。特别地,它能够在几种工程应用中实现高刚度和低重量的机械部件,这在很大程度上需要。在本研究中,边界元法(BEM)通过弹性和粘弹性方法机械地表示3D固体。 1D桁架BEM元件代表增强件,其允许弹性塑性行为。子区域BEM技术模拟非均匀系统,而连接1DBEM元件允许沿着材料界面交叉增强。在没有特殊链接元素的非线性方案中,粘结滑动行为已被占制定。可以核算不同的债券滑移法,这使得不同粘附行为的机械建模。所提出的配方应用于四种复合3D应用的机械分析。将所提出的配方实现的结果与文献中可获得的等同数值方法和实验结果进行比较。所提出的制剂导致准确稳定的结果。此外,应用程序复杂性演示了它。

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