Chapter 17 - Laser additive manufacturing and mechanical deformation behavior of novel multirod structure inspired by front wing of beetle

Abstract

Development of additive manufacturing technology effectively extends the design and application of novel lattice structures. Novel bio-inspired multirod structures were designed and fabricated by laser powder bed fusion (LPBF) to investigate the effects of processing parameters on densification behavior, microstructure, and mechanical properties. Two different alloys, i.e., AlSi10Mg and NiTi, were used to fabricate multirod structures. For the AlSi10Mg bio-inspired multirod structures, the high densification of multirod structure can achieve 97%, and the multirod structure has high bearing capacity and large displacement of 2.95kN and 1.18mm, respectively. For the NiTi bio-inspired multirod structures, the compressive deformation behavior and coupled twisting feature were investigated based on the experimental and simulation methods. As the strain increased, the twisting angle per axial strain rapidly declined and finally stabilized at ∼0.6°/%. After six cycles, the recoverable strain or twisting angle ratio approached to 1.