Flexural fatigue properties of polycarbonate fused-deposition modelling specimens. (5th October 2018)

• Record Type: Journal Article
• Authors: Puigoriol-Forcada, Josep M.; Alsina, Alex; Salazar-Martín, Antonio G.; Gomez-Gras, Giovanni; Pérez, Marco A.
• Is Part Of: Materials & design. Volume 155(2018)
• Page Start: 414
• Page End: 421
• Publication Date: 2018-10-05
• Subjects: Fatigue -- Fused-deposition modelling -- Polycarbonate -- Process parameters; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2018.06.018
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: This report presents an experimental investigation on the influence of part build orientation on the flexural fatigue behaviours of fused-deposition modelling (FDM) processed polycarbonate (PC) parts. Quantification of fatigue behaviour is required to show the feasibility of manufacturing industrial parts with the FDM technique. Therefore, stress-cyclic strain (S-N) curves were experimentally obtained for alternating stress (R − 1) and mean stress (R − 0.5). Test performances show that the part build orientation significantly affects the dynamic behaviour of FDM parts because of the inner anisotropy. Furthermore, to prove the validity of simulation methods such as finite element analysis (FEA), a case study was conducted. A designed part was simulated with FEA and the obtained von Mises stresses were corrected using the Goodman correction and the S-N curve for R − 1. This part was also manufactured and tested to compare the simulated and experimental results. The results show good accuracy between the virtual and physical models. Graphical abstract: Highlights: The flexural fatigue characteristics of PC parts manufactured by FDM are investigated for different stress ratios. The part build orientation parameter significantly affects the dynamic behaviour; the XY and YZ are the most favourable. A validation by FEA is addressed; a good correlation between the experimental and simulated data was achieved.