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About the applicability of a simple model to predict the fatigue life and behavior of woven-ply thermoplastic laminates at T>Tg

Abstract : Through the application of a simple model, the concept of damage accumulation has been used to predict the fatigue life of TP-based composite materials at a test temperature higher than its glass transition temperature. This work was aimed at studying the off-axis tension–tension fatigue behavior of woven-ply C/PPS laminates which consists of three primary stages: (i) In the initial phase of cyclic loading, damage accumulates rapidly along with a matrix plasticization under the form of intra-laminar cracking which may initiate in multiple locations, but preferably at the interfaces between fibers and matrix at the crimps – (ii) The second stage is characterized by a steady damage growth rate and little damage accumulation – (iii) Damage (mostly debonding and interlaminar cracks) generalizes rapidly during the last stage ultimately resulting in extensive delamination and fiber bundles pull-out. It also appears that the fatigue behavior is ascribed to the highly ductile and time-dependent behavior of matrix-rich regions due to the non-planar structure of woven plies. Finally, a simple analytical model was applied, and proved to be adequate to capture the different stages of damage scenario, with excellent correlation to the experimental data.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02132999
Contributor : Benoit Vieille Connect in order to contact the contributor
Submitted on : Friday, May 17, 2019 - 5:52:28 PM
Last modification on : Tuesday, October 19, 2021 - 4:14:38 PM

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B. Vieille, Wiliam Albouy. About the applicability of a simple model to predict the fatigue life and behavior of woven-ply thermoplastic laminates at T>Tg. Composites Part B: Engineering, Elsevier, 2014, 61, pp.181-190. ⟨10.1016/j.compositesb.2014.01.050⟩. ⟨hal-02132999⟩

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