Determination of Mechanical Properties of Notched Weft Knitted Glass Fiber in Variable Thickness Composites

Abstract

In this paper, mechanical properties of notched weft-knitted glass fiber stiffness and strength of knitted composite plates were determined. The knitted fabric composite plates was fabricated for various thickness by using 360 grams per m2 glass fiber woven mat with the 10: 1 ratio of LY 556 epoxy resin and HY 951 hardener. Thickness of plates 7, 12 and 13.5mm consists of 22, 41 and 49 layers. However, to date, no comparative study has been made to evaluate the suitability of different modeling schemes to predict the stiffness and strength properties of knitted fabric composites. Further, a comparative study of tensile and compression test is carried out based on a plain weft knitted glass fiber reinforced composites. The compression test having the ultimate stress of maximum at 12 mm thick plate and tensile test the ultimate stress was maximum at 13.5 mm thick plate.Specimens were prepared for two configurations CWC and WCW. The stiffness and strength data is plotted with respect to load vs. displacement curves. Mechanical properties of variable thickness glass fiber composites stiffness and strength depends on the material size as well as thickness of the plate. The test result in stiffness and strength is predicted by using the experimental data.