Abstract The fatigue properties of lattice structures produced by S-EBM are investigated. Fatigue failure is shown to be gradual, fostering the concept of grace period, defined as the number of cycles lived by the lattice structure after the failure of the first strut. A numerical framework based on the cascading failure of struts is proposed, relying on a damage accumulation law. Each strut is assigned a radius as well as an S-N curve, which both depend on the manufacturing conditions. Through statistical analyses, we demonstrate that the model can correctly predict the grace period and the fatigue life of experimental specimens.

中文翻译：

---

一种预测增材制造晶格结构疲劳寿命的数值框架

摘要 研究了S-EBM产生的晶格结构的疲劳性能。疲劳失效被证明是渐进的，这促进了宽限期的概念，宽限期定义为第一个支柱失效后晶格结构所经历的周期数。提出了一个基于支柱级联失效的数值框架，依赖于损伤累积规律。每个支柱都分配有半径和 SN 曲线，这两者都取决于制造条件。通过统计分析，我们证明该模型可以正确预测试验试样的宽限期和疲劳寿命。