Behaviour ofE-glass fibre reinforced vinylester resin composites under impact fatigue |
| |
Authors: | Rita Roy B K Sarkar N R Bose |
| |
Affiliation: | (1) Department of Material Science, Indian Association for the Cultivation of Science, 700 032 Kolkata, India;(2) Central Glass and Ceramic Research Institute, 700 032 Kolkata, India |
| |
Abstract: | An impact fatigue study has been made for the first time on 63.5% glass fibre reinforced vinylester resin notched composites.
The study was conducted in a pendulum type repeated impact apparatus especially designed and fabricated for determining single
and repeated impact strengths. A well-defined impact fatigue (S-N) behaviour, having a progressive endurance below the threshold
single cycle impact fracture stress with decreasing applied stress has been demonstrated. Fractographic analysis revealed
fracture by primary debonding having fibre breakage and pullout at the tensile zone, but a shear fracture of fibre bundles
at the compressive zone of the specimen. The residual strength, modulus and toughness showed retention of the properties at
high impact stress levels up to 1000 impacts followed by a sharp drop. Cumulative residual stresses with each number of impacts
not withstanding the static fatigue failure at long endurances have been ascribed for the composite failures under the repeated
impact stresses. |
| |
Keywords: | impact fatigue static fatigue residual stress E-glass fibre vinylester resin |
本文献已被 SpringerLink 等数据库收录! |