Abstract Additive manufacturing (AM) enables fabrication of multiscale cellular structures as a whole part, whose features can span several dimensional scales. Both the configurations and layout pattern of the cellular lattices have great impact on the overall performance of the lattice structure. In this paper, we propose a novel design method to optimize cellular lattice structures to be fabricated by AM. The method enables an optimized load-bearing solution through optimization of geometries of global structures and downscale mesostructures, as well as global distributions of spatially-varying graded mesostructures. A shape metamorphosis technology is incorporated to construct the graded mesostructures with essential interconnections. Experimental testing is undertaken to verify the superior stiffness properties of the optimized graded lattice structure compared to the baseline design with uniform mesostructures.

中文翻译：

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具有优化细观结构的渐变晶格结构设计用于增材制造

摘要 增材制造 (AM) 能够将多尺度蜂窝结构作为一个整体制造，其特征可以跨越多个维度尺度。蜂窝晶格的配置和布局模式对晶格结构的整体性能有很大影响。在本文中，我们提出了一种新的设计方法来优化由 AM 制造的蜂窝晶格结构。该方法通过优化全局结构和缩小尺度细观结构的几何形状，以及空间变化分级细观结构的全局分布，实现了优化的承载解决方案。结合形状变形技术来构建具有基本互连的渐变细观结构。