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Extensions of the coating approach for topology optimization of composite sandwich structures

机译：复合三明治结构拓扑优化涂层方法的延伸

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Additive manufacturing offers new design opportunities for composite sandwich structures. The work presented herein builds on the concepts of the coating approach for topology optimization of shell-infill structures by using density gradients to determine local material orientations. A generalized material property interpolation scheme is presented and the sensitivity analysis for the minimum compliance optimization problem is developed. The approach is demonstrated for an orthotropic shell using the Messerschmitt-Bolkow-Blohm benchmark problem and results approach the isotropic solution when an equivalent in-plane modulus is considered. To adapt the approach to composite sandwich structures, a methodology based on the addition of a contour finding step is presented to define separate properties in the exterior shell from interior shells. The work introduces a new approach in topology optimization to tackle composite fibre reinforced sandwich structures that would benefit from a complex core structure obtained by additive manufacturing.
机译：添加剂制造为复合三明治结构提供了新的设计机会。本文所呈现的工作通过使用密度梯度来确定壳体填充结构的涂层方法的概念，以确定局部材料取向。提出了广泛的材料性能插值方案，开发了最小合规优化问题的灵敏度分析。使用Messerschmitt-Bolkow-Blohm基准问题的正交壳对正交壳进行说明该方法，并且当考虑等同的面内模量时，结果接近各向同性溶液。为了使方法适应复合夹层结构的方法，提出了一种基于加入轮廓发现步骤的方法，以限定来自内壳的外壳中的单独性质。该工作介绍了一种新的拓扑优化方法，以解决复合纤维增强夹层结构，该结构将受益于通过添加剂制造获得的复杂核心结构。

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