|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Large-strain Compressive Response and Failure Mechanisms of Additively Manufactured Cubic Chiral Lattices
||Caterina Iantaffi, Eral Bele , Chu Lun Alex Leung, Martina Meisnar , Thomas Rohr , Peter D. Lee
|On-Site Speaker (Planned)
Developments in metal additive manufacturing (AM) technologies, such as Electron Beam powder bed fusion (EPBF), have facilitated the manufacturing of lattice structures with tailorable mechanical properties. EPBF provides an excellent opportunity for optimising the mechanical response of structural lattices; however, the mechanical response under loading conditions is not well understood.
In here, we combined experimental and finite element modelling results to investigate large-strain compressive mechanical response of Ti-6Al-4V chiral quadratic lattice made by EPBF. The responses of the unit cell, and finite-size specimens are analysed numerically, including appropriate ductile failure initiation and propagation criteria. The elastic modulus and yield strength follow classic scaling laws of bending-dominated lattices; however, the sequence of deformation mechanisms, ultimate fracture strain, and energy absorption characteristics are dependent on the slenderness ratio of the constitutive struts.
||Additive Manufacturing, Modeling and Simulation, Titanium