PSI - Issue 28

D. Rigon et al. / Procedia Structural Integrity 28 (2020) 1655–1663 Rigon et al. / Structural Integrity Procedia 00 (2019) 000–000

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 Regarding IM materials, static properties of recycled ABS are comparable with the virgin material. On the contrary, recycling deteriorates the tensile strength of PP (-40%) and PP-GF30 (-51%); however, regarding the latter material, lack of information regarding the fiber length must be noted. Fatigue strength results at R=-1 were available only for recycled PP and PP-GF and it has been verified that recycling negatively affects the fatigue strength at two million cycles, which decreases approximately by one third;  Regarding FDM materials, tensile strengths of the virgin PP are slightly lower (between -5% and -10%) than the same IM material, regardless the infill patterns but with one exception, in that FDM_±45° specimens resist 21% less than the IM material. Contrary to the virgin PP general behavior, tensile properties of virgin ABS and virgin PP-GF30 are well lower than corresponding IM materials and a strong dependency on the infill pattern was observed. The highest and the lowest tensile strength of the ABS was obtained for the infill patter 0° (-33%) and 90° (-76%), respectively. Whereas for the PP-GF30 only results referred to the infill pattern ±45° were available in the literature (-40%). Fatigue strength data were available only for virgin ABS. It has been verified that fatigue strength at ten thousand cycles is at least halved by considering the different infill patterns, where the best fatigue performance is obtained for 0°, 0°/90° and ±45° specimens (-55% on average), while worst fatigue strength pertains to 90° specimens (- 84%). References Abdelhaleem, A. M. M., Megahed, M., Saber, D., 2018. Fatigue behavior of pure polypropylene and recycled polypropylene reinforced with short glass fiber. Journal of Composite Materials 52, 1633–1640. Carneiro, O. S., Silva, A. F., Gomes, R., 2015. Fused deposition modeling with polypropylene,” Material Design 83, 768–776. Crawford, R. J., Benham, P. P., 1975. Some fatigue characteristics of thermoplastics. Polymer 16, 908–914. Czyżewski, P., Bieliński, M., Sykutera, D., Jurek, M., Gronowski, M., Ryl, Ł., Hoppe, H., 2018. Secondary use of ABS co-polymer recyclates for the manufacture of structural elements using the FFF technology. Rapid Prototyping Journal 24, 1447–1454. Dizon, J. R. C. , Espera, A. H., Chen, Q., Advincula, R. C., 2018. Mechanical characterization of 3D-printed polymers. Additive Manufacturing 20, 44–67. Farzadfar, A., Khorasani, S. N., Khalili, S., 2014. Blends of recycled polycarbonate and acrylonitrile-butadiene-styrene: comparing the effect of reactive compatibilizers on mechanical and morphological properties. Polymer International 63, 145–150. Fu, S. Y., Lauke, B., Mäder, E., Yue, C. Y., Hu, X., 2000. Tensile properties of short-glass-fiber- and short-carbon-fiber-reinforced polypropylene composites. Composites Part A: Applied Science and Manufacturing 31, 1117–1125. Hertzberg, R. W., Vinci, R. P., Hertzberg, J. L., 2012. Deformation and Fracture Mechanics of Engineering Materials. 5th ed. Wiley. Jap, N. S. F., Pearce, G. M., Hellier, A. K., Russell, N., Parr, W. C., Walsh, W. R., 2019. The effect of raster orientation on the static and fatigue properties of filament deposited ABS polymer, International Journal of Fatigue 124, 328–337. Marissen R., Schudy, D., Kemp, A. V.J.M., Coolen, S. M.H., Duijzings, W. G., Van Der Pol, A., Van Gulick, A. J., 2001. The effect of material defects on the fatigue behaviour and the fracture strain of ABS. Journal of Materials Science 36, 4167–4180. Meneghetti, G., Ricotta, M., Lucchetta, G., Carmignato, S., 2014. An hysteresis energy-based synthesis of fully reversed axial fatigue behaviour of different polypropylene composites. Composites Part B: Engineering 65, 17–25. Padzi, M. M., Bazin, M. M., Muhamad, W. M. W., 2017. Fatigue Characteristics of 3D Printed Acrylonitrile Butadiene Styrene (ABS). IOP Conf. Series: Materials Science and Engineering 269, no. 1. Park, S.-H., Park, C.-M., Kim, J.-H., Kim, T., 2015. Derivation of Fatigue Properties of Plastics and Life Prediction for Plastic Parts. 2015 World Congress on Advances in Structural Engineering and Mechanics (ASEM15), Incheon, Korea, pp. 4–9. Pegoretti A., Riccò, T., 1999. Fatigue crack propagation in polypropylene reinforced with short glass fibres. Composites Science and Technology 59, 1055–1062. Pegoretti A., Riccò, T., 2000. Fatigue Fracture of Neat and Short Glass Fiber Reinforced Polypropylene: Effect of Frequency and Material Orientation. Journal of Composite Materials 34, 1009–1027. Safai, L., Cuellar, J. S., Smit, G., Zadpoor, A. A., 2019. A review of the fatigue behavior of 3D printed polymers. Additive Manufacturing 28, 87– 97. Sauer, J. A., Hara, M., 1990. Effect of molecular variables on crazing and fatigue of polymers, In: Kausch H.H. (eds) Crazing in Polymers Vol. 2. Advances in Polymer Science, vol. 91/92, 69–118. Zander, N. E., Gillan, M., Burckhard, Z., Gardea, F., 2018. Recycled polypropylene blends as novel 3D printing materials. Additive Manufacturing 25, 122–130. Zhao, P., Rao, C., Gu, F., Sharmin, N., Fu, J., 2018. Close-looped recycling of polylactic acid used in 3D printing: An experimental investigation and life cycle assessment. Journal of Cleaner Production 197, 1046–1055. Ziemian, S., Okwara, M., Ziemian, C. W, 2015. Tensile and fatigue behavior of layered acrylonitrile butadiene styrene. Rapid Prototyping Journal 21, 270–278.