Experimental study of FRP bonded joints with various thickness and length

초록

F.R.P specimens were made by mixture CM(chopped mat)450-104 Matrix & RC(roving clothes)570-100 Roving, the mixture ratio Resin: hardener (92:8)for tensile test. It was also made of plates by hand lay-up method and was been cured for 24 hours and then was cut tensile specimens in accordance with ASTM D638 Type 3. Knowing exact behavior of bonded area's stress and strain when the tensile test was going on, the test specimens were made of 1ply, 2 plies and 4plies laminae of F.R.P. in each for supporting cut part in middle of specimen length. And in middle part also, were covered of F.R.P plies of 1/2,2/3 length of specimen in each as well. This study reveals that as ply’s thickness is more thicken, rupture stress grows remarkably larger