Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Evaluation of Residual Strength in Aircraft Composite Under Impact Damage

충격손상을 받은 항공기용 복합재료의 잔류강도 평가

  • Choi, Jung-Hun (Department of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Kang, Min-Sung (Department of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Shin, In-Hwan (Department of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Koo, Jae-Mean (Department of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Seok, Chang-Sung (Department of Mechanical Engineering, Sungkyunkwan Univ.)
  • 최정훈 (성균관대학교 기계공학부 일반대학원) ;
  • 강민성 (성균관대학교 기계공학부 일반대학원) ;
  • 신인환 (성균관대학교 기계공학부 일반대학원) ;
  • 구재민 (성균관대학교 기계공학부) ;
  • 석창성 (성균관대학교 기계공학부)
  • Published : 2010.02.01
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Abstract

Composite materials have a higher specific strength and modulus than traditional metallic materials. Additionally, these materials offer new design flexibilities, corrosion and wear resistance, low thermal conductivity and increased fatigue life. These, however, are susceptible to impact damage due to their lack of through-thickness reinforcement and it causes large drops in the load-carrying capacity of a structure. Therefore, the impact damage behavior and subsequently load-carrying capacity of impacted composite materials deserve careful investigation. In this study, the residual strength and impact characteristics of plain-woven CFRP composites with impact damage are investigated under axial tensile test. Impact test was performed using drop weight impact tester. And residual strength behavior by impact was evaluated using the caprino model. Also we evaluated behavior of residual strength by change of mass and size of impactor. Examined change of residual strength by impact energy change through this research and consider impactor diameter in caprino model.

Keywords

References

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