Estimating degradation of strength of neat PEEK and PEEK-CF laminates under cyclic loading by mechanical hysteresis loops

Authors

  • Alexey Bogdanov Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia Department of Materials Science, Engineering School of Advanced Manufacturing Technologies, National Research Tomsk Polytechnic University, Tomsk, Russia https://orcid.org/0000-0001-8858-5768
  • Alexander Eremin Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science
  • Mikhail Burkov Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science https://orcid.org/0000-0002-3337-6579
  • Sergey Panin Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia Department of Materials Science, Engineering School of Advanced Manufacturing Technologies, National Research Tomsk Polytechnic University, Tomsk, Russia https://orcid.org/0000-0001-7623-7360
  • Pavel Lyubutin Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Russia https://orcid.org/0000-0003-1732-0791

DOI:

https://doi.org/10.3221/IGF-ESIS.66.09

Keywords:

Polyetheretherketone (PEEK), polymer composite material, fatigue, elastic modulus, strain, hysteresis loop, digital image correlation

Abstract

A method for assessing the degradation of mechanical properties of neat polyetheretherketone and its laminated composite reinforced with unidirectional carbon fibers is proposed. It is based on the calculation of the maximum and minimum strains in a cycle, as well as both dynamic and secant moduli estimated from mechanical hysteresis loops. These parameters reflect the material damage degree, enabling to predict its current mechanical state.

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    Published

    27-09-2023

    Issue

    Vol. 17 No. 66 (2023): October 2023

    Section

    SI: Russian mechanics contributions for Structural Integrity

    Categories

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    Copyright (c) 2023 Alexey Bogdanov, Alexander Eremin, Mikhail Burkov, Sergey Panin, Pavel Lyubutin

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