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Comparison of notch fabrication methods on the impact strength of FDM-3D printed PLA specimens: experimental study and finite element analysis

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Title Comparison of notch fabrication methods on the impact strength of FDM-3D printed PLA specimens: experimental study and finite element analysis
 
Creator Meltem, Eryildiz
 
Subject Fused deposition modeling
charpy impact strength
impact testing
build orientation
material characterization
finite element analysis (FEA)
 
Description 1-29
Over the last few years, additive manufacturing (AM) has become increasingly essential. As more AM applications emerge, the demand for measured material properties to aid product development and engineering grows. Impact properties, in particular, are hard to come by. In this study, the effect of the notch fabrication method (printing the notch on the part; and machining notch) on the impact results of polylactic acid (PLA) was investigated. Sensitivity to build orientation was also noted in both test situations. The impact test specimens were printed using an FDM-based printer with or without a notch at various orientations (print angles of 0,45,60° and build orientations of on-edge, flat). Un-notched specimens were then machined to create notches. To simulate the impact effects, Ansys software was employed to create a finite element model, and the results of the finite element analysis were consistent with the experimental results. According to the findings, the impact strength of the specimens with 3D-printed notches increased by 11 to 38% compared to specimens whose notch was machined after the rectangular bars were 3D-printed. It is also observed that impact strength was enhanced as the build orientation is changed from 0° to 60°. In addition, when compared to flat-oriented parts, edge-oriented parts had a higher impact strength. The impact strength increase for edge-oriented parts was 16% in the specimens with 3D-printed notches, while it was 4% in the specimens with having machined notch.
 
Date 2022-04-11T14:07:27Z
2022-04-11T14:07:27Z
2022-04-11
 
Type Article
 
Identifier 2582-6492 (Online); 0036-8512 (Print)
http://nopr.niscair.res.in/handle/123456789/59514
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source SR Vol.59(04) [April 2022]