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Mechanical Behaviour of GFRP Composites according to Alumina Powder Impregnation Ratios in Resin

알루미나 분말 혼합 비율에 따른 GFRP의 기계적 강도 특성

  • Kang, Dae-Kon (Department of Safety Engineering, Chungbuk National University) ;
  • Park, Jai-Hak (Department of Safety Engineering, Chungbuk National University)
  • Received : 2019.09.19
  • Accepted : 2019.12.03
  • Published : 2020.01.27

Abstract

Small fishing vessels are manufactured using FRP. Various studies have been conducted to increase the strength of the composite material by mixing alumina powder with resin. Tensile tests and flexural strength tests are conducted to examine the effect of alumina powder on the strength of GFRP. In the current study, resin/alumina composites at different alumina contents (i.e., 0, 1, 5, and 10 vol%) have been prepared. The physical and mechanical properties of the prepared composites have been investigated. From the results, the tensile strength of the specimen with alumina powder mixed in at 10% shows the highest value of 155.66 MPa. The tensile strength of the specimen mixed with alumina powder increases with the amount of alumina powder impregnated. In the flexural strength test, the flexural strength of neat resin without alumina powder has a highest value of 257.7 MPa. The flexural modulus of ALMix-5 has a highest value of 12.06 GPa. Barcol hardness of ALMix-10 has a highest value of 51. We show that alumina powder leads to decreasing cracks on the surface and decreasing length area of delamination.

Keywords

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