首页|Analysis of failure mechanisms of degraded hybrid glass-carbon composites in acidic medium: Insights from acoustic emission analysis
Analysis of failure mechanisms of degraded hybrid glass-carbon composites in acidic medium: Insights from acoustic emission analysis
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NSTL
Elsevier
In this paper, the failure mechanisms of environmentally degraded hybrid glass/carbon fiber reinforced epoxy composites that are subjected to tensile loading are examined. The test specimens are manufactured by vacuum bag molding and the hybrid laminates are exposed to 5 wt% nitric acid at room temperature. The study is carried out by using a combination of Acoustic Emission (AE) nondestructive testing and scanning electron microscopy. Matrix cracking, matrixfiber debonding, and fiber failure are found to be the main causes of reduction of mechanical properties of the exposed specimens. Unlike the control sample, the exposed specimens show an additional group of acoustic emission events that could be correlated to a delamination between glass and carbon fiber layers. It can be concluded that the synergistic effect of the corrosive environment and stress induced by ion exchange phenomenon has led to fiber scission; which in turn has reduced the load-bearing capabilities of the composite specimens.
Hybrid compositesDamage mechanismsAcoustic emission testingDegradationScanning electron microscopySTRESS-CORROSION CRACKINGPSEUDO-DUCTILITYDAMAGEHYBRIDIZATIONDELAMINATIONCLASSIFICATIONDEGRADATIONPREDICTIONFLAX
Amini, Mohammad、Gazik, Reza Amini、Honarvar, Farhang、Montazeri, Abbas
NSTL
Elsevier
