Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)

  • 2002.04a
  • /
  • Pages.84-87
  • /
  • 2002
  • /
  • 1975-342X(pISSN)
The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지

Notch Radius Effect for Static Fracture Toughness of Al 7175 Alloys

Al 7175 합금의 정적 파괴인성에 미치는 노치반경 영향

  • 김재훈 (충남대학교 기계설계공학과) ;
  • 김덕회 (충남대학교 기계설계공학과) ;
  • 박성욱 (충남대학교 기계설계공학과) ;
  • 문순일 (국방과학연구소)
  • Published : 2002.04.01
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Abstract

In this study, intrinsic fracture toughness of Al 7175-T74 is evaluated from the apparent toughness of notched specimen. Modified average stress model is used to establish the relationship to predict the intrinsic fracture toughness from the apparent fracture toughness of a notched-cracked specimen. The modified average stress model is established the relation between notch radius and effective distance calculated by FEM analysis. The results show that fracture toughness decreases with decreasing of notch root radius. The true fracture toughness can be predicted from test results of apparent fracture toughness measured by using notched specimen.

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