Multiaxial static strength of a 3D printed metallic lattice structure exhibiting brittle behavior

This paper focuses on numerical the prediction of multiaxial static strength lattice structures. We analyze a body-centered cubic cell printed with Selective Laser Melting in AlSi10Mg aluminum alloy. Parent material is experimentally characterized, and Gurson-Tveergard-Needleman (GTN) damage model calibrated to predict failure simulations. The GTN used structures exhibiting brittle localized fracture, it validated through tests. results experimental tension/compression monotonic tests samples are compared simulations performed as-built geometry reconstructed by X-ray computed tomography, showing good correlation. Combining computational micromechanics, loading conditions simulated investigate effective material. Yielding loci found fitting batch points obtained some A formulation based criterion proposed Tsai Wu (1971) for anisotropic materials provides description yielding behavior under load. Results discussed, specific focus effect defects strength, comparing resistance domains as-manufactured as-designed lattices.