Development of experimental method to characterize pressure-dependent yield criteria for polymeric foams

Youngmin Kim, Shinill Kang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In addition to lightweight and moldable characteristics, polymeric foams possess an excellent energy-absorbing capability that can be used for a wide range of commercial applications, especially for crash protection in automobiles. The purpose of the present study is to develop an experimental methodology to characterize the pressure dependent yield behavior of energy-absorbing polymeric foams. A device was designed to perform a compression test in a triaxial stress state. For the test material, polyurethane foams of two different densities were used. The displacement of the specimen, the load applied to the specimen, and hydrostatic pressure applied to the specimen were measured and controlled. Stress-strain curves and yield stresses for different hydrostatic pressures were obtained. The experiments conducted in this study revealed that the polyurethane foams exhibited significant increase in yield stress with applied hydrostatic pressure or mean normal stress. Based on this observation, a yield criterion which included the effect of the stress invariant was established for the foams. The experimental constants obtained which constituted the pressure-dependent yield criterion were verified.

Original languageEnglish
Pages (from-to)197-202
Number of pages6
JournalPolymer Testing
Volume22
Issue number2
DOIs
Publication statusPublished - 2003 Apr 1

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Hydrostatic pressure
Foams
Yield stress
Polyurethanes
Stress-strain curves
Automobiles
Experiments
polyurethane foam

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

Cite this

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Development of experimental method to characterize pressure-dependent yield criteria for polymeric foams. / Kim, Youngmin; Kang, Shinill.

In: Polymer Testing, Vol. 22, No. 2, 01.04.2003, p. 197-202.

Research output: Contribution to journalArticle

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