Page 426 - IJB-9-6

International Journal of Bioprinting Versatile pomelo peel-inspired structures

Figure 3. (A) Morphology of Al-Mg-Sc-Zr powder. (B) LPBF process. (C) Schematic of island scanning strategy applied in LPBF. (D) As-fabricated BPPSs
components with different VFs.

FEA by ANSYS LS-DYNA software was conducted. The and a fluid domain (Figure 4C). The invariable heating
2
finite element model contained a top plate for displacement power was set to 5 W, and the heat flux was 34,722 W/m .
and a bottom plate for fixing, and the BPPS was sandwiched The mesh sensitivity analysis was carried out to ensure
in the middle of them (Figure 4B). The displacement was that the simulation results were independent of the mesh
applied to deform the model, and the value was set at 8 size as shown in Figure 5A. The maximum deviation
mm. Tetrahedral mesh was used as the mesh of the model, of the temperature index was within 0.15%, while the
and Al-Mg-Sc-Zr was used as the material of BPPS. The number of polyhedral mesh cells ranged from 3,270,000
material mechanical properties’ parameters of Al-Mg-Sc- to 6,770,000. Figure 5B presents the meshed numerical
[40]
Zr are displayed in Table 2 . model by polyhedral mesh cells, exhibiting targeted local
In order to investigate the influence of VF on the heat mesh refinement.
dissipation performance of BPPSs and compare the heat The heat dissipation structure and heating substrate
dissipation performance of BPPSs and traditional fin were composed of Al-Mg-Sc-Zr alloy and pure aluminum,
structures (Fins) , FEA by ANSYS FLUENT software respectively. The material thermal properties’ parameters
[41]
was conducted. The finite element model contained a heat of Al-Mg-Sc-Zr and pure aluminum are displayed in
dissipation structure (BPPS or Fin), a heating substrate, Table 3. To evaluate the heat dissipation performance of

Volume 9 Issue 6 (2023) 418 https://doi.org/10.36922/ijb.1011