Damping behaviors of steel-based Kelvin lattice structures fabricated by indirect additive manufacture combining investment casting
Abstract
The lattice structures have broad application prospect in the fields of lightweight design, vibration and noise reduction and so on. In this work, firstly, steel-based lattice structures were designed based on Kelvin unit cell with isotropic properties. Then, steel-based lattice structures were prepared by using of indirect additive manufacture combining with investment casting process. Thirdly, the finite element numerical simulation and modal testing of the dynamic damping performance of the steel-based lattice structures were carried out. The results show that changing the porosity of the lattice structures, the vibration parameters such as the natural frequency and damping ratio of the lattice structures can be well regulated. At the same time, the damping ratios of the lattice structures are considerably improved compared with the solid materials.
- Publication:
-
Smart Material Structures
- Pub Date:
- May 2020
- DOI:
- 10.1088/1361-665X/ab78b8
- Bibcode:
- 2020SMaS...29e5001W
- Keywords:
-
- Kelvin unit cell;
- lattice structures;
- indirect additive manufacture;
- investment casting;
- damping ratios;
- modal analysis