PSI - Issue 51

Daniel Ivaničić et al. / Procedia Structural Integrity 51 (2023) 199 – 205 D. Ivani č i ć et al. / Structural Integrity Procedia 00 (2019) 000–000

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Fig. 5. (a) Results of the topology optimization; (b) Parametric 3D model of the optimized shape.

2.4. FE analysis of the optimized sample Prior to experimental verification, FE analysis of the optimized shape stress distribution was made to verify the design for both PET-G and ABS assigned 3D models. Material properties and loading force were set identically as for topology optimization, however, clamping scenario was modified in order to solve convergence issues. Analysis with modified boundary conditions converged within 5 % when considering Von Mises stresses. Fig. 6. shows y axis displacement distribution for 3D models with assigned ABS and PET-G properties.

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Fig. 6. y axis displacement distribution according to FEA for 3D models with assigned (a) ABS material properties; (b) PET-G properties.

2.5. Verification of the topology optimization using Digital Image Correlation An experimental verification i.e. Digital Image Correlation measurements were performed on the optimized shape cantilever plate load-bearing elements using the ARAMIS system and GOM Correlate software. Optimized test samples were 3D printed using Prusa i3 MK3 FDM printer with the same printing settings as for beam samples used to determine Young’s moduli values, one ABS (Fig. 7) and two PET-G samples.

Fig. 7. 3D printed ABS optimized cantilever plate load-bearing element.