Lohmuller Paul, Favre Julien, Piotrowski Boris, Kenzari Samuel, Laheurte Pascal
Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux LEM3 UMR CNRS 7239, Arts et Métiers ParisTech Campus de Metz, Université de Lorraine, F-57078 Metz, France.
Institut Jean Lamour, UMR 7198 CNRS-Université de Lorraine, Campus Artem, F-54011 Nancy, France.
Materials (Basel). 2018 Jul 5;11(7):1146. doi: 10.3390/ma11071146.
The continuous design of cubic lattice architecture materials provides a wide range of mechanical properties. It makes possible to control the stress magnitude and the local maxima in the structure. This study reveals some architectures specifically designed to reach a good compromise between mass reduction and mechanical strength. Decreased local stress concentration prevents the early occurrence of localized plasticity or damage, and promotes the fatigue resistance. The high performance of cubic architectures is reported extensively, and structures with the best damage resistance are identified. The fatigue resistance and S⁻N curves (stress magnitude versus lifetime curves) can be estimated successfully, based on the investigation of the stress concentration. The output data are represented in two-dimensional (2D) color maps to help mechanical engineers in selecting the suitable architecture with the desired stress concentration factor, and eventually with the correct fatigue lifetime.
立方晶格结构材料的连续设计提供了广泛的机械性能。这使得控制结构中的应力大小和局部最大值成为可能。本研究揭示了一些专门设计的结构，以在减轻质量和机械强度之间达成良好的平衡。局部应力集中的降低可防止局部塑性或损伤的过早出现，并提高抗疲劳性。立方结构的高性能被广泛报道，并且确定了具有最佳抗损伤性的结构。基于对应力集中的研究，可以成功估计抗疲劳性和S⁻N曲线（应力大小与寿命曲线）。输出数据以二维（2D）彩色图表示，以帮助机械工程师选择具有所需应力集中系数并最终具有正确疲劳寿命的合适结构。
