The aim of this work is to study the effect of rounded fillets and minimal surfaces on the mechanical and fatigue performances of the topologically optimized lattice structure, especially a stress concentration assessment method is proposed to evaluate the fatigue performance. Results show that rounded corners and minimal surfaces are conducive to improving fatigue performances and the effect of the latter is better. Rounded fillet optimized lattice with the ratio of the fillet radius to the strut diameter of about 0.56 and minimal surface optimized lattice with k of 0.9 to 1.1 present the lowest degree of stress concentration.

中文翻译：

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具有优异疲劳性能的拓扑优化晶格结构

这项工作的目的是研究圆角和最小表面对拓扑优化晶格结构的力学和疲劳性能的影响，特别是提出了一种应力集中评估方法来评估疲劳性能。结果表明，圆角和最小表面有利于提高疲劳性能，后者的效果更好。圆角半径与支柱直径之比约为 0.56 的圆角优化晶格和 k 为 0.9 至 1.1 的最小表面优化晶格呈现最低程度的应力集中。