Mingzheng Huo, Jie Chen, Qin Yang, Zheng Xiang, Donghua Dai, Shangqin Yuan, Shuke Huang, Xianfeng Shen. Influence of Rod Diameter on Dynamic Vibration Damping Characteristics of NiTi Alloy Lattice Structure Fabricated by Selective Laser Melting[J]. Chinese Journal of Lasers, 2022, 49(14): 1402305
- Chinese Journal of Lasers
- Vol. 49, Issue 14, 1402305 (2022)
Fig. 1. BCC unit and overall model modeled by UG
Fig. 2. NiTi powder and printed lattice structure. (a) Particle size distribution of NiTi powder; (b) microscopic image of NiTi powder; (c) NiTi BCC lattice structure printed by selective laser melting (SLM)
Fig. 3. Finite element analysis settings. (a) Finite element model meshing; (b) boundary condition determination
Fig. 4. Dynamic performance test. (a) Top view of vibration test device with a lattice structure, including two single-axis control accelerometer on the adapter board and two triaxial acceleration sensors in the X and Z directions of the lattice structure; (b) half-power bandwidth method
Fig. 5. Modal simulation results.(a) The first six modes of NiTi alloy BCC lattice structure; (b) relationship between rod diameter and first-order intrinsic frequency
Fig. 6. Amplitude-frequency characteristic curve of sine sweep frequency for lattice structure with different rod diameters. (a) 0.6 mm rod diameter; (b) 0.8 mm rod diameter; (c) 1.0 mm rod diameter; (d) 1.2 mm rod diameter
Fig. 7. Summary of sine sweep frequency experimental data. (a) First-order intrinsic frequency versus rod diameter；(b) structural damping ratio versus rod diameter
Fig. 8. DSC curves of samples with different rod diameters. (a) 0.6 mm rod diameter; (b) 0.8 mm rod diameter；(c) 1.0 mm rod diameter; (d) 1.2 mm rod diameter
Fig. 9. Micro-CT porosity analysis and statistical results of BCC cells with different rod diameters. (a) 0.6 mm rod diameter；(b) 0.8 mm rod diameter; (c) 1.0 mm rod diameter; (d) 1.2 mm rod BCC cells with diameter
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Table 1. Analysis of O element content and phase transition temperature of BCC structures with different rod diameters
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