几何特征对晶格力学性能的影响分析

Analysis of the influence of geometric features on the mechanical properties of lattice

在增材制造领域,格栅优化技术由于其能充分发挥材料性能、节约成本等特点而得到广泛的使用。格栅优化所采用晶格的几何特征对结构所能承受的极限载荷及其疲劳寿命具有重要的影响。文章首先生成典型的面心立方晶格,并对所创建晶格的杆件连接处用不同的倒角进行处理,然后创建不同几何特征和尺寸的晶格有限元模型,计算其在拉伸、剪切和扭转工况下的受力情况,最后,对计算结果进行比较,分析晶格尺寸和几何特征对结构承载力的影响。

In the field of additive manufacturing,lattice optimization techniques are widely used due to their ability to fully exploit material properties and cost savings.The geometric characteristics of the lattice used for lattice optimization have an important influence on the ultimate load that the structure can withstand and its fatigue life.The article firstly creates a typical face-centered cubic lattice and treats the rod joints of the created lattice with different chamfers,then creates finite element models with different geometrical features and sizes of the lattice and calculates the stresses under tensile,shear and torsional conditions.Finally,the calculated results are compared to analyze the effect of lattice size and geometric features on the structural load carrying capacity.