A Study on Behavior of F.R.P Bonded Double Lap Joints and Bonded Joint Characteristics

초록

F.R.P specimens were made of Chopped Mat 450, Roving Clothes 570 and the mixture ratio of resin Versus hardener was 92 to 8 (weight) for tensile test. It was fabricated by hand lay-up method, hardened for 24 hours and cut tensile specimens in accordance with ASTM D638 Type 3. The test specimens which bonded 2 plies that were made out of F.R.P were prepared to know the exact behavior of bonded area's stress and strain. And we must know the relation of plie's length, stress and strain. Thus, in the middle of specimens it is also covered of 2 plies that the length is 1/2, 2/3 size. Also we consider shear stress in adhered area. This study reveals that the length of plies are more longer, rupture stress are remarkably larger.