Experimental Investigation on Ductility Property of Glass Fibre Reinforced Polymer Chopped Strand Mat Laminate
摘要
In the present study, the mechanical property of glass fibre reinforced polymer (GFRP) chopped strand mat (CSM) laminate is investigated based on the tensile strength test. Ductile property is one of the significant mechanical properties of construction materials. The Ultimate strength of the non-ductile materials may be more than the ductile materials however non-ductile materials will fail without any warning if the building is exposed to unexpected loads. A tensile strength test is usually conducted for the ductility analysis. Nowadays, GFRP composites/ bars are commonly used for building construction as internal and external reinforcement. In addition to that GFRP composites and epoxy resin combinations are used for the repair and rehabilitation of existing structural components such as beam, slab, column, etc. Steel reinforcement has very good ductility properties; however, the lifespan of the steel-reinforced concrete building is reduced due to steel reinforcement corrosion. GFRP composites/bars are the suitable alternate material for the steel reinforcement since it has very good corrosion-resistant properties. In this study, the tensile strength test on GFRP CSM laminate was conducted at Lonestar Alpha laboratory, Oman to observe the ultimate, yield tensile strength and modulus of elasticity. The tensile strength test results of GFRP laminate are compared with the steel reinforcement properties. For the tensile strength test, GFRP laminate of width and thickness of 100 mm and 0.6 mm respectively were prepared and tested. The test results show that the yield strength, maximum tensile strength and elongation corresponding to the maximum tensile strength are 98.90 MPa, 137 MPa and 6.2 mm, respectively. The load-deflection graph shows that there is no plastic zone in GFRP laminate and hence it is not a ductile material.