The effect of cell shape and infill porosity on compressive mechanical behavior of 3D printed extruded cross-sections

Paper #:
  • 2017-01-0284

Published:
  • 2017-03-28
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Abstract:
Additive manufacturing has been a promising technique for producing sophisticated porous structures. The pore's architecture and infill density percentage can be easily controlled through additive manufacturing methods. This paper reports on development of polymer extruded cross sections ad lightweight materials manufactured using additivemanufacturing technology. In this study, three types of crosssections with same 2D porosity are generated by way of particular techniques. a) The regular cross section of hexagonal honeycomb, b) The heterogeneous pore distribution of closed cell aluminum foam cross section obtained from image processing and c) linearly patterned topology optimized 2D unit cell undercompressive loading condition. All the cross sections have the same cavity to matter ratio on their 2D configuration. The samples are extruded to produce 3D CAD model of honeycomb shape porous structure. In addition, the additive manufacturing technique has been employed to produce printed samples with various internal micro porosity based on infill density control of 3D printer. The different samples are tested with universal compressive machine and mechanical characteristics of the models are investigated. Furthermore, the energy absorption efficiency and load bearing capability of samples are studied.The results of the experimental procedure are verified by numerical simulation under quasi-static condition . Keywords: Additive manufacturing, cellular structure, energy absorption, topology optimization, compressive behavior
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