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Cylindrical shell finite element based on the proper generalized decomposition

机译:基于适当的广义分解的圆柱壳有限元

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Design of laminated structures needs computation of local quantities, thus a Layerwise approach is necessary to recover this kind of results. The computational cost of such approach increases with the number of layers. In this work, the introduction of the Proper Generalized Decomposition (PGD) is presented for the layer-wise modeling of heterogeneous cylindrical shells in order to reduce the number of unknowns. The displacement field is approximated as a sum of separated functions of the in-plane coordinates ξ~1, ξ~2 and the transverse coordinate z. This choice yields to an iterative process that consists of solving a 2D and 1D problem successively at each iteration. In the thickness direction, a fourth-order expansion in each layer is considered. For the in-plane description, classical Finite Element Method is used. Relevance of the present approach is demonstrated on different benchmarks analyzed by Ren (1987). Mechanical tests for thin/thick and deep/shallow laminated cylindrical shells are presented. The results are compared with the elasticity reference solutions.
机译:层叠结构的设计需要计算局部数量,因此可以将图像恢复是必要的,以恢复这种结果。这种方法的计算成本随着层数而增加。在这项工作中,提出了适当的广义分解(PGD),用于非均质圆柱形壳体的层面建模,以减少未知数的数量。位移字段近似为面内坐标的分离功能ξ〜1,ξ〜2和横向坐标z。该选择产生迭代过程,该过程包括在每次迭代中连续解决2D和1D问题。在厚度方向上,考虑每层中的四阶扩展。对于面内描述,使用经典有限元方法。对当前方法的相关性在REN(1987)分析的不同基准上进行了证明。提出了用于薄/厚和深/浅层叠层圆柱壳的机械测试。将结果与弹性参考溶液进行比较。

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