Mechanical Properties of Liquid and Solid Repaired on Damaged Model of Glass Fiber-Reinforced Polymer Composites
AbstractThis study has investigated the effect of repair method on mechanical properties of Glass Fiber-Reinforced Polymers (GFRP). Composite materials are primarily damaged by mechanical loads. In this study, a damaged composite was repaired by liquid filling and solid filling methods. The damaged composite was modeled by drilled composites specimen with 5 mm drill. The specimen than repaired in the form of the same fluid and solid mixture of epoxy resin composite. The tensile and impact properties of damaged and repaired composites were observed. The results show the increase of tensile and impact strength in each additional glass fiber in both liquid and solid repair. Also, solid repair data show the better and the increase of tensile and impact strength than the liquid repair. They are 23, 40 and 46 MPa for tensile strength of solid repair with 10%, 20% and 30% of additional glass-fiber respectively. Moreover, the impact strength data of solid repair show 0.86, 1.00 and 1.99 J/mm2 with 10%, 20% and 30% of additional glass fiber respectively. Fractography study shows the fracture of Repaired Solid Hollow Glass-Fiber Reinforced Polymers (RSHGFRP) 30% composite located in the circle of repaired area. Solid repair shows higher mechanical properties than liquid repair.
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