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Gharad, Abdellah El
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Publications (6/6 displayed)
- 2022Monitoring damage evolution with acoustic emission in two types of glass epoxy laminatescitations
- 2019Evaluation of damage mechanisms in glass/epoxy laminates using the acoustic emission technique
- 2018Acoustic emission monitoring of damage progression in Glass/Epoxy composites during static and fatigue tensile testscitations
- 2018Experimental investigation of the fatigue behavior of glass/epoxy composites evaluated by the stiffness degradation and damage accumulationcitations
- 2017Experimental and numerical investigation of the effects of stacking sequence and stress ratio on fatigue damage of glass/epoxy compositescitations
- 2017Experimental and numerical study of the stacking sequence effect on fatigue damage in a glass epoxy composite
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article
Experimental investigation of the fatigue behavior of glass/epoxy composites evaluated by the stiffness degradation and damage accumulation
Abstract
The present paper deals with the mechanical behavior of glass/epoxy composite materials under static and cyclic tensile loading. The tested specimens have been made with different stacking sequences ([02/902]s; [902/02]s; [03/90]s; [903/0]s) according to the vacuum infusion procedure. The results of this investigation show the static behavior of the tested laminated composites characterized by the strain to failure, Young's modulus and tensile strength. Wöhler curves corresponding to each stacking sequence were plotted in order to observe the evolution of the maximum stress Smax according to the number of cycles. Fatigue Tests were performed under various applied loading levels (r), and these values were chosen to evaluate the effect of loading level on the stiffness degradation and damage growth in the tested specimens. Afterward the evolution of the global damage factor (D) according to the number of cycles was calculated in function of the core characteristics, applied loading level (r) and type of loading. The cyclic behavior of the composite laminates mainly depends on the progressive developments of damage mechanisms such as matrix cracking, delamination, and fiber breakage.