An assessment of mechanical behaviour and fractography study of
glass/epoxy composites at different temperatures and loading speeds, Sanghamitra
Sethi and Bankim Chandra Ray, Department of Metallurgical & Materials Engineering.
ffect of loading rate on fracture and mechanical behavior of autoclave cured glass
fiber/epoxy prepreg composite has been studied at various loading (striking) rates
(0.01-103mm/min). The maximum load carrying capacity and strain at yield continuously
increases with increasing loading speed.
| The interlaminar shear strength (ILSS)
value is high at low loading speed and becomes low at high loading speed with the
transition of loading rate at approximately 300 mm/min. The formation of steps,
welt interfacial failure and cleavage formation on matrix resin i.e. localized plastic
deformation processes were dominating mechanisms for specimens tested at low loading
rates, while brittle fracture of fiber, fiber pull-out and impregnation were dominating
mechanisms for specimens tested at loading rates of 800 mm/min or higher. More in:
Materials and Design DOI-10.1016/j.matdes.2014.07.017
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