Plasticity in polymeric honeycombs made by photo-polymerization and nozzle based 3D-printing |
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| Institution: | 1. Polymeric Materials Research Group, Department of Materials Science and Engineering, Sharif University of Technology, Azadi Ave., P.O. Box 11155-9466 Tehran, Iran;2. Department of Polymer Engineering, University of Bayreuth, Universitätsstraße 30, D-95440 Bayreuth, Germany;3. Institute for Carbon Composites, Faculty of Mechanical Engineering, Technische Universität München, Boltzmannstraße 15, Garching, D-85748 Munich, Germany;1. Laboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary;2. Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1519 Budapest, P.O. Box 286, Hungary;1. Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary;2. MTA–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3., H-1111 Budapest, Hungary;1. LMS, Ecole Polytechnique, CNRS, Université Paris-Saclay, 91128 Palaiseau, France;2. Laboratoire PIMM, ENSAM, CNRS, CNAM, 151 bd de l’Hôpital, 75013 Paris, France;1. Centre Català del Plàstic, Departament de Ciència dels Materials i Enginyeria Metal-lúrgica, Universitat Politècnica de Catalunya, BarcelonaTech, C/Colom 114, 08222 Terrassa, Spain;2. NUDEC SA, C/ Pintor Vila Cinca, 24-28, Pol. Ind. Can Humet de Dalt, 08213 Polinyà, Spain;1. Chemistry Department, Faculty of Science, Damietta University, Damietta, Egypt;2. Physics Department, Faculty of Science, Damietta University, Damietta, Egypt |
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| Abstract: | Study of the plastic deformation in polymeric honeycombs can pave the way for understanding the deformation localization in more complex cellular structures, which have received progressive attention in the past few years. This study compares the strain localization in deforming honeycombs made by two cost-effective 3D-printing technologies. Hexagonal honeycombs and their unit cell models were 3D-printed by both PolyJet™, using a photo-crosslinkable polymer, and fused deposition modeling (FDM) using a thermoplastic material. The state of the art digital image correlation (DIC) technique was employed as the experimental route in order to calculate the strain field during the deformation of manufactured parts. It was found that DIC is an effective tool to study the localization in 3D-printed honeycomb struts. Moreover, in comparison with FDM, PolyJet technology provides more homogeneous strain distributions in struts. In addition, FDM decreases the maximal strains generated on the side layers of the honeycomb struts. Accordingly, the ligament damage under plastic deformation can be postponed and the energy absorption capability of the product can be improved when PolyJet technology is utilized. |
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| Keywords: | PolyJet Fused deposition modeling Deformation localization Digital image correlation Hexagonal honeycomb |
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