Experimental studies on hygric strain behaviour of Jute-Pineapple hybrid composites

Hygric strain behaviour of hybrid natural composites was found out experimentally. Hybrid composites are prepared through hand layup technique using pineapple / jute fibers of 40:0, 30:10, 20:20, 10:30 and 0:40 ratios. The overall fiber volume fraction was fixed at 0.4Vf. A separate test setup has been designed for determination of hygric strain (β) in moisture environment. Changes in radius of curvature for each specimen were measured periodically with respect to time. Coefficient of hygric strains are determined from weight gain and change in radius of curvature.