Table of Contents
Journal of Composites
Volume 2014, Article ID 795984, 10 pages
http://dx.doi.org/10.1155/2014/795984
Research Article

High Strain Rate Compressive Behavior of Polyurethane Resin and Polyurethane/Al2O3 Hollow Sphere Syntactic Foams

1Department of Mechanical and Aerospace Engineering, Polytechnic School of Engineering, New York University, Brooklyn, NY 11201, USA
2Deep Springs Technology, LLC, 4750W, Bancroft Street, Toledo, OH 43615, USA

Received 27 July 2014; Revised 20 September 2014; Accepted 28 September 2014; Published 29 October 2014

Academic Editor: Masamichi Kawai

Copyright © 2014 Dung D. Luong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Polyurethane resins and foams are finding extensive applications. Seat cushions and covers in automobiles are examples of these materials. In the present work, hollow alumina particles are used as fillers in polyurethane resin to develop closed-cell syntactic foams. The fabricated syntactic foams are tested for compressive properties at quasistatic and high strain rates. Strain rate sensitivity is an important concern for automotive applications due to the possibility of crash at high speeds. Both the polyurethane resin and the syntactic foam show strain rate sensitivity in compressive strength. It is observed that the compressive strength increases with strain rate. The energy absorbed up to 10% strain in the quasistatic regime is 400% higher for the syntactic foam in comparison to that of neat resin at the same strain rate.