The additive manufacturing technology can be used to manufacture the complex lattice structures that are difficult to be fabricated by the traditional manufacturing technologies. In order to study the fracture and failure behavior of Ti6Al4V lattice structures manufactured by selective laser melting under compressive load, the cell topologies of face centered cubic with vertical struts (FCCZ) and body centered cubic with vertical struts (BCCZ) were chosen. The bulk material samples and four kinds of FCCZ and BCCZ lattice samples were designed and manufactured. The compression tests were performed and progressive failure modes were studied and compared. And stress–strain curves, the compressive strength, the effective elastic modulus, and the specific compressive strength were calculated and compared. It is shown that the compressive strength of FCCZ samples is about 30% higher than that of BCCZ samples. Both 30 mm and 50 mm FCCZ samples exhibit abrupt shear failure, while the local buckling of lattice cells is the major failure mode for both 30 mm and 50 mm high BCCZ samples. Finite element analysis was conducted to study progressive damage of the lattice samples, and the numerical results can explain the experimental findings.

增材制造技术可用于制造传统制造技术难以制造的复杂晶格结构。为了研究在压缩载荷下通过选择性激光熔化制备的Ti6Al4V晶格结构的断裂和破坏行为，选择了具有垂直支柱的面心立方（FCCZ）和具有垂直支柱的体心立方（BCCZ）的单元拓扑。设计并制造了散装材料样品以及四种FCCZ和BCCZ晶格样品。进行了压缩测试，并对渐进式破坏模式进行了研究和比较。计算并比较了应力-应变曲线，抗压强度，有效弹性模量和比抗压强度。结果表明，FCCZ样品的抗压强度比BCCZ样品高约30％。对于30 mm和50 mm高的BCCZ样品，30 mm和50 mm的FCCZ样品均表现出突然的剪切破坏，而晶胞的局部屈曲是主要的​​破坏模式。进行了有限元分析以研究晶格样品的渐进损伤，数值结果可以解释实验结果。