Mechanical characterization and preliminary modeling of PEEK

Wenlong Li, Eric N. Brown, Philip J. Rae, George Gazonas, Mehrdad Negahban

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

3 Scopus citations


Poly-ether-ether-ketone (PEEK) is a high-performance semi-crystalline polymer with mechanical and thermal stability characteristics that are superior to most tough polymers. The mechanical characteristics of this polymer are modeled over a broad range of mechanical loading conditions using a thermodynamically consistent modeling process. This preliminary model, which ignores the thermal response and the possible recrystallization of this material during loading, shows an outstanding ability to capture the multidimensional nonlinear response of PEEK up to 60% compression, with loading rates from 0.0001 to 3000 1/s at room temperature. The model includes the measured anisotropy in the wave response that develops with plastic flow, captures the evolution of the measured equilibrium stress, and correctly matches the evolution of the tangent modulus at equilibrium. This broad range of rates and experimental conditions are achieved by using a two-element nonlinear thermodynamically-consistent model.

Original languageEnglish (US)
Title of host publicationMechanics of Composite and Multifunctional Materials - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
EditorsPiyush R. Thakre, Carter Ralph, Meredith Silberstein, Raman Singh
PublisherSpringer New York LLC
Number of pages10
ISBN (Print)9783319217611
StatePublished - 2016
EventSEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015 - Costa Mesa, United States
Duration: Jun 8 2015Jun 11 2015

Publication series

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


OtherSEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015
Country/TerritoryUnited States
CityCosta Mesa


  • Anisotropic elasticity
  • Equilibrium stress
  • Mechanical modelling
  • Plastic flow
  • Poly-ether-ether-ketone (PEEK)

ASJC Scopus subject areas

  • General Engineering
  • Computational Mechanics
  • Mechanical Engineering


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