Compression Behaviors and Energy Absorption Properties of Aluminium Alloy Based Lattice Truss Materials

As a new ordered porous material, Al based lattice materials exhibit more advantageous mass efficiency and mechanical properties compared with traditional Al foams and Al honeycombs.They have been believed to be one of the most promising lightweight structural materials with high strength and ductility. By computer-aided design and 3D printing technology, combining with plaster-mold-infiltration technology, 3D lattice truss Al alloy with different structure parameters and matrix material were fabricated. The quasi-static compression mechanical behavior, energy absorption capability and temperature dependence of the materials were characterized.The results show that the aluminium alloy based lattice materials have similar stress-strain behavior to that of common porous metals.The strength and energy absorption capability increase as the relative density or matrix strength increases.The mechanical properties show indiscernible change in temperatures ranging from-60 ℃to 80 ℃.