Compressive Properties Anisotropy of BCC Lattice Structure Formed by Fused Deposition Modeling
The 1×1,1×2 and 2×2 lattice structures were designed based on body-centered cubic(BCC)lattice structure.The 1×1 lattice structures with 80%and 100%filling rate and the 1×2 and 2×2 lattice structures with 100%filling rate were prepared by fused deposition modeling(FDM)technology,and compression tests were carried out in 0° and 90° directions for the lattice structures,respectively.The anisotropy of compressive properties under different filling rates and different number of lattice units were studied.The results show that the lattice structures exhibit a fracture pattern characterized by cracking along the stacking surface of the formed material.The compressive strength,compressive modulus and total energy absorption of the 2×2 lattice structure at 90° compression are the largest,reaching 0.34 MPa,7.85 MPa and 4.31 J,respectively,which are increased by 13.3%,11.2%and 10.4%compared with that at 0°,respectively.The 2×2 lattice structure demonstrates superior energy absorption characteristics under 5%strain.The 1×1 lattice structure with 100%filling rate has the highest specific absorption energy at 90° compression,reaching 206.15 J/kg,which is 30.66%higher than that at 0°.The anisotropy of the mechanical properties of the BCC lattice structure is studied,which provides a basis for the engineering application of the lattice structure formed by FDM process.
国家科技期刊平台
NSTL
万方数据
