PSI - Issue 53

Mohammad Reza Khosravani et al. / Procedia Structural Integrity 53 (2024) 264–269

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Author name / Structural Integrity Procedia 00 (2023) 000–000

6. Conclusion

Considering applications of AM for fabrication of end-use products, the mechanical behavior of the parts has gained a lot of significance. In the current study, e ff ects of geometry and accelerated thermal aging on the mechanical strength of 3D-printed polymer parts have been studied. To this end, PLA material was used to print specimens with di ff erent geometries (dumbbell-shaped, smooth, and V-notch) based on the FDM process. Moreover, accelerated thermal aging within temperatures of -5 ◦ C to 35 ◦ C was conducted to determine the fracture behavior of 3D-printed parts befor and after aging. Based on a series of tensile tests under static loading conditions, we conclude that the highest fracture load was belong to the smooth specimens in both aged and unaged conditions. Particularly, the fracture load was 1980.5 N in unaged smooth specimens which was decreased to 1704.1 N after accelerated thermal aging. 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