Temperature, Strain Rate and Pressure Sensitivity of the Polyetheretherketone’s Yield Stress

Author:

El-Qoubaa Zakaria12,Othman Ramzi3

Affiliation:

1. Ecole Centrale de Nantes, Institut de Recherche en, Génie Civil et Mécanique (GeM), LUNAM Université, UMR CNRS 6183, BP 92101, 44321 Nantes cedex 3, France

2. Laboratoire d’Innovation Durable et de Recherche Appliquées (LIDRA), Ecole Polytechnique d’Agadir — Universiapolis, Bab Al Madina, Quartier Tillila, Agadir 80000, Morocco

3. Mechanical Engineering Department, Faculty of Engineering, King Abdulaziz University, P. O. Box 80248, Jeddah 21589, Saudi Arabia

Abstract

The polymer yield behavior is affected by temperature, strain rate and pressure. In this work, tensile yield stress of polyetheretherketone (PEEK) is characterized for temperature ranging between [Formula: see text] and [Formula: see text] ([Formula: see text]C and [Formula: see text]C). The tensile yield stress is decreasing in terms of temperature. Two temperature transitions are observed: [Formula: see text] ([Formula: see text]C) and the glass transition temperature. The temperature sensitivity is well captured by the modified-Eyring equation proposed by the authors. This paper completes three previous works where the PEEK’s yield behavior was described under compression on wide ranges of strain rate and temperature and under tension on a wide range of strain rates. Thus, the pressure effect is analyzed in terms of temperature and strain rate. Using either the experimental data or the modified-Eyring equation, the effect of the hydrostatic pressure is increasing with temperature and decreasing with strain rate.

Publisher

World Scientific Pub Co Pte Lt

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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