Improved mechanical properties of an epoxy glass–fiber composite reinforced with surface organomodified nanoclays

An organomodified surface nanoclay reinforced epoxy glass-fiber composite is evaluated for properties of mechanical strength, stiffness, ductility and fatigue life, and compared with the pristine or epoxy glass-fiber composite material not reinforced with nanoclays. The results from monotonic tensil...

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Bibliographic Details
Published in:	Composites. Part B, Engineering Vol. 72; pp. 175 - 182
Main Authors:	Withers, G.J., Yu, Y., Khabashesku, V.N., Cercone, L., Hadjiev, V.G., Souza, J.M., Davis, D.C.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-04-2015
Subjects:	A. Nano-structures A. Polymer-matrix composites (PMCs) B. Mechanical properties Composite materials D. Electron microscopy Ductility tests Fatigue life Glass fiber reinforced plastics Glass-epoxy composites Mechanical properties Nanostructure Ultimate tensile strength Walls A. Polymer-matrix composites (PMCs) A. Nano-structures B. Mechanical properties D. Electron microscopy
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Summary:	An organomodified surface nanoclay reinforced epoxy glass-fiber composite is evaluated for properties of mechanical strength, stiffness, ductility and fatigue life, and compared with the pristine or epoxy glass-fiber composite material not reinforced with nanoclays. The results from monotonic tensile tests of the nanoclay reinforced composite material at 60°C in air showed an average 11.7% improvement in the ultimate tensile strength, 10.6% improvement in tensile modulus, and 10.5% improvement in tensile ductility vs. these mechanical properties obtained for the pristine material. From tension–tension fatigue tests at a stress-ratio=+0.9 and at 60°C in air, the nanoclay reinforced composite had a 7.9% greater fatigue strength and a fatigue life over a decade longer or 1000% greater than the pristine composite when extrapolated to 109 cycles or a simulated 10-year cyclic life. Electron microscopy and Raman spectroscopy of the fracture and failure modes of the test specimens were used to support the results and conclusions. This nanocomposite could be used as a new and improved material for repair or rehabilitation of external surface wall corrosion or physical damage on piping and vessels found in petrochemical process plants and facilities to extend their operational life.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1359-8368 1879-1069
DOI:	10.1016/j.compositesb.2014.12.008