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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

Dae-Kon Kang
,
Jai-Hak Park†
강 대곤
,
박 재학†
Department of Safety Engineering, Chungbuk National University, Cheongju-si 28644, Korea
충북대학교 안전공학과
†Corresponding author E-Mail : jhpark@chungbuk.ac.kr (J. H. Park, Chungbuk Univ.)
January 2020. pp. 22-30
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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
glass fiber reinforced plastics
FRP fishing vessels
alumina powder
delamination
crack
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 30
  • No :1
  • Pages :22-30
  • Received Date : 2019-09-19
  • Revised Date : 2019-11-04
  • Accepted Date : 2019-12-03
  • DOI :https://doi.org/10.3740/MRSK.2020.30.1.22
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