Sateesh N.,GRIET |
Sampath Rao P.,Vijay Rural Engineering College |
Materials Today: Proceedings | Year: 2015
This work has been conducted to investigate the environmental impacts of fiber composites. The main objective of this work is to investigate the degradation of GFRP composite which is exposed to different environmental conditions and its influence on the tensile strength. In order to study environmental impact on fiber composites, a total of 530 strand-type E-glass/polyester resin specimens were fabricated and exposed to different environmental conditions (i.e. exposed to water) up to 180 days. Three point bending test is carried out on 30, 60, 90,120,150 and 180 days water bath specimens. From the results, flexural modulus and retention ratio are calculated and tested. From the test results, it is clear that the flexural modulus of the conditioned specimens was significantly reduced due to the degradation of GFRP under the environmental conditions considered. Its retention ratio calculated also significantly reduced. The results showed that over the lifecycle, impact on GFRP Composite exposed to water for long period of time. © 2015 Elsevier Ltd.
Babu A.S.,Vijay Rural Engineering College |
Narayanan R.G.,ITT Guwahati
Procedia Engineering | Year: 2013
The present work investigates the effect of tool shoulder diameter, plunge depth, tool rotation speed and welding speed on the load- extension behaviour during in-plane stretching of FSW blanks made of Al 6061 alloy. In-plane stretching test was performed on Instron machine similar to tensile test. The data were taken from the machine and plotted the graphs for each parameter. It is found from the present work that the maximum load has increased with decrease in shoulder diameter, increase in welding speed and tool rotational speed. The load required is almost same for two different plunge depths. The extension has increased with increase in shoulder diameter, plunge depth, welding speed and tool rotational speed, while the base metal has maximum load and lesser extension. The failure pattern is same for un-welded and welded blanks, except the failure initiation. © 2013 The Authors. Published by Elsevier Ltd.