Advertisement

Characterization of Polymeric Foams under Multi-Axial Static and Dynamic Loading

  • Isaac M. DanielEmail author
  • Jeong-Min Cho
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

An orthotropic 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., Cij. Intermediate strain rate tests were conducted in a servohydraulic 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 (10-4 s-1), intermediate (1 s-1 ), and high (103 s-1 ) strain rates.

Keywords

Blast Loading Polymeric Foam High Strain Rate Test Composite Sandwich Structure Cellular Foam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Gibson, L.J. and M.F. Ashby, Cellular Solids. 2nd ed., New York: Cambridge University Press (1997).Google Scholar
  2. 2.
    Daniel, I.M., E.E. Gdoutos, K.-A. Wang and J.L. Abot, “Failure Modes of Composite Sandwich Beams,” International Journal of Damage Mechanics, 11, 309-334 (2002).CrossRefGoogle Scholar
  3. 3.
    Gdoutos, E.E., I.M. Daniel, and K.A. Wang, “Failure of Cellular Foams under Multiaxial Loading,” Composites Part A, 33, 163-176, (2002).CrossRefGoogle Scholar
  4. 4.
    Flores-Johnson, E.A. and Q.A. Li, “Degradation of Elastic Modulus of Progressively Crushable Foams in Uniaxial Compression,” Journal of Cellular Plastics, 44, 415-434, (2008).CrossRefGoogle Scholar
  5. 5.
    Abrate, S., “Criteria for Yielding or Failure of Cellular Materials,” Journal of Sandwich Structures and Materials, 10, 5-51, (2008).CrossRefGoogle Scholar
  6. 6.
    Ramon, O. and J. Mintz, “Prediction of Dynamic Properties of Plastic Foams from Constant Strain Rate Measurements,” J. Appl. Polym. Scie., 40(9-10),1683-1692 (1990).CrossRefGoogle Scholar
  7. 7.
    Daniel, I.M. and S. Rao, “Dynamic Mechanical Properties and Failure Mechanisms of PVC Foams,” Dynamic Failure in Composite Materials and Structures, ASME Mechanical Engineering Congress and Exposition, AMD-Vol. 243, 37-48 (2000).Google Scholar
  8. 8.
    Viot, P., F. Beani and J.-L. Latallade,”Polymeric foam behavior under dynamic compressive loading,” J. Mat. Scie., 40, 5829-5837 (2005).Google Scholar
  9. 9.
    Lee, Y.S., N.H. Park and H.S. Yoon, “Dynamic Mechanical Characteristics of Expanded Polypropylene Foams,” J. Cellular Plastics, 46, 43-55 (2010).CrossRefGoogle Scholar
  10. 10.
    Zhang, Y., N. Kikuchi, V. Li, A. Yee and G. Nusholtz, “Constitutive Modeling of Polymeric Foam Material Subjected to Dynamic Crash Loading,” International Journal of Impact Engineering, vol. 21, No. 5, pp. 369 386, 1998.Google Scholar
  11. 11.
    Tagariellia, V.L., V.S. Deshpande, N.A. Fleck, and C. Chen, “A constitutive model for transversely isotropic foams, and its application to the indentation of balsa wood,” International Journal of Mechanical Sciences, 47, 666-686, (2005).CrossRefGoogle Scholar
  12. 12.
    Gielen, A.W.J., “A PVC-foam material model based on a thermodynamically elasto-plastic-damage framework exhibiting failure and crushing,” International Journal of Solids and Structures, vol. 45, pp. 1896–1917, 2008.zbMATHCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Robert R. McCormick School of Engineering and Applied ScienceNorthwestern UniversityEvanstonUSA

Personalised recommendations