Characterization of polymeric foams under multi-axial static and dynamic loading

Isaac M. Daniel*, Jeong Min Cho

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

An orthotopic polymeric foam with transverse isotropy (Divinycell H250) used in composite sandwich structures was characterized under multi-axial quasi-static and dynamic loading. Quasi-static tests were conducted along principal material axes as well as along off-axis directions under tension, compression, and shear. An optimum specimen aspect ratio of 10 was selected based on finite element analysis. Stress-controlled and strain-controlled experiments were conducted. The former yielded engineering material constants such as Young's and shear moduli and Poisson's ratios; the latter yielded mathematical stiffness constants, i. e., C ij. Intermediate strain rate tests were conducted in a servo-hydraulic machine. High strain rate tests were conducted using a split Hopkinson Pressure Bar system built for the purpose. This SHPB system was made of polymeric (polycarbonate) bars. The polycarbonate material has an impedance that is closer to that of foam than metals. The system was analyzed and calibrated to account for the viscoelastic response of its bars. Material properties of the foam were obtained at three strain rates, quasi-static (10 -4s -1), intermediate (1 s -1), and high (10 3s -1) strain rates.

Original languageEnglish (US)
Title of host publicationDynamic Behavior of Materials - Proceedings of the 2010 Annual Conference on Experimental and Applied Mechanics
PublisherSpringer New York LLC
Pages121-129
Number of pages9
ISBN (Print)9781441982278
DOIs
StatePublished - 2011

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume1
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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