For lightweight cellular structures fabricated via powder bed fusion additive manufacturing (PBF-AM), both the material anisotropy and the cellular topology design are both important design factors. In this work, a direct stiffness matrix-based analytical modeling approach was employed for the evaluation of material anisotropy-topology effects on three representative 3D cellular structures (auxetic, BCC and octahedral). The established models were verified via experimentation with samples fabricated by EB-PBF using Ti6Al4V as material, using the material anisotropy information established experimentally using single struts with different build orientations (0°, 15°, 30°, 45°, 60°, 75° and 90°). The predicted mechanical properties of the Ti6Al4V cellular structures showed good agreement with experimental results. It was shown that both the strength and elastic modulus anisotropy of the materials affect the strength of the cellular structures, which must be determined based on the topology design. In addition, the material anisotropy-topology effects on cellular structures of varying cellular pattern sizes were also investigated in order to quantify the pattern size effects. It was found that the pattern size effects and the material anisotropy effects can be decoupled during the design of the mechanical properties of these cellular structures.

对于通过粉末床融合增材制造（PBF-AM）制造的轻质蜂窝结构，材料各向异性和蜂窝拓扑设计都是重要的设计因素。在这项工作中，采用了基于直接刚度矩阵的分析建模方法来评估材料各向异性拓扑对三种代表性3D细胞结构（生长，BCC和八面体）的影响。通过使用以不同构造方向（0°，15°，30°，45°，60°，75、75）的单支杆通过实验建立的材料各向异性信息，通过对以Ti6Al4V为材料的EB-PBF制造的样品进行实验，验证了建立的模型°和90°）。Ti6Al4V细胞结构的预测力学性能与实验结果吻合良好。结果表明，材料的强度和弹性模量各向异性都影响孔结构的强度，必须根据拓扑设计确定该强度。此外，还研究了材料各向异性拓扑对不同细胞图案大小的细胞结构的影响，以便量化图案大小的影响。已经发现，在设计这些孔结构的机械性能时，图案尺寸效应和材料各向异性效应可以分离。为了量化图案尺寸的影响，还研究了材料各向异性拓扑学对不同细胞图案尺寸的细胞结构的影响。已经发现，在设计这些孔结构的机械性能时，图案尺寸效应和材料各向异性效应可以分离。为了量化图案尺寸的影响，还研究了材料各向异性拓扑学对不同细胞图案尺寸的细胞结构的影响。已经发现，在设计这些孔结构的机械性能时，图案尺寸效应和材料各向异性效应可以分离。