Damage characterization during high temperature fatigue of off-axis woven organic matrix composites for aircraft applications

13th International Conference on Textile Composites

Foti, F.^1 ; Pannier, Y.^1 ; Mellier, D.^1 ; Gigliotti, M.^1

Institut Pprime, University of Poitiers, ISAE-ENSMA, CNRS 3346, Department of Physics and Mechanics of Materials, 1, Avénue Clément Ader, Futuroscope Chasseneuil

F-86962, France^1

关键词: Aggressive environment;    Aircraft applications;    Controlled environment;    D. digital image correlation (DIC);    Damage characterization;    Environmental fatigue;    High-temperature fatigue;    Organic matrix composites;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/406/1/012055/pdf
DOI  :  10.1088/1757-899X/406/1/012055

来源: IOP

【 摘 要 】

The present work focuses on damage characterization during high temperature fatigue of 8HS woven [45]6 carbon HTS40 carbon fibre/polyimide matrix composite samples. Fatigue tests are performed under controlled environment (air, 2 bar O2, 2 bar N2) at 250°C by using a specific experimental setup developed at PPRIME Institute; Digital Image Correlation (DIC) and μ-Computed Tomography (μCT) are used for monitoring the evolution of sample behaviour during fatigue. It is shown that these two techniques are effective and complementary for damage assessment under fatigue at high temperature under aggressive environment: a rich characterisation of damage extent and orientation can be provided which allows damage being formalised in a way that can be naturally integrated within the context of damage-dependent behaviour models. The employment of such description allows performing full assessment of the effects of environmental fatigue.