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Article
Low-Velocity Impact Behavior of Sandwich Structures with Additively Manufactured Polymer Lattice Cores
Journal of Materials Engineering and Performance
  • Andrew J. Turner, Wright State University - Main Campus
  • Mohammed Al Rifaie, Wright State University - Main Campus
  • Ahsan Mian, Wright State University - Main Campus
  • Raghavan Srinivasan, Wright State University - Main Campus
Document Type
Article
Publication Date
4-1-2018
Abstract
Sandwich panel structures are widely used in aerospace, marine, and automotive applications because of their high flexural stiffness, strength-to-weight ratio, good vibration damping, and low through-thickness thermal conductivity. These structures consist of solid face sheets and low-density cellular core structures, which are traditionally based upon honeycomb folded-sheet topologies. The recent advances in additive manufacturing (AM) or 3D printing process allow lattice core configurations to be designed with improved mechanical properties. In this work, the sandwich core is comprised of lattice truss structures (LTS). Two different LTS designs are 3D-printed using acrylonitrile butadiene styrene (ABS) and are tested under low-velocity impact loads. The absorption energy and the failure mechanisms of lattice cells under such loads are investigated. The differences in energy-absorption capabilities are captured by integrating the load–displacement curve found from the impact response. It is observed that selective placement of vertical support struts in the unit-cell results in an increase in the absorption energy of the sandwich panels.
DOI
10.1007/s11665-018-3322-x
Citation Information
Andrew J. Turner, Mohammed Al Rifaie, Ahsan Mian and Raghavan Srinivasan. "Low-Velocity Impact Behavior of Sandwich Structures with Additively Manufactured Polymer Lattice Cores" Journal of Materials Engineering and Performance (2018) ISSN: 1059-9495
Available at: http://works.bepress.com/raghavan_srinivasan/107/