Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Axial Collapse Characteristics of Aluminum CFRP Compound Square Members for Vehicle Structural Members

차체구조부재용 알루미늄 CFRP 혼성사각부재의 축 압궤 특성

  • 이길성 (조선대학교 대학원 기계설계공학과) ;
  • 차천석 (순천대학교 기계자동차공학부) ;
  • 편석범 (동강대학 소방안전관리과) ;
  • 양인영 (조선대학교 기계설계공학과) ;
  • 심재기 (조선대학교 기전공학과)
  • Published : 2005.10.01
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Abstract

An aluminum or CFRP (Carbon Fiber ReinfDrced Plastics)is representative one of light-weight materials but its axial collapse mechanism is different from each other. The aluminum member absorbs energy by stable plastic deformation, while the CFRP member absorbs energy by unstable brittle failure with higher specific strength and stiffness than those in the aluminum member. In an attempt to achieve a synergy effect by combining the two members, aluminum CFRP compound square members were manufactured, which are composed of aluminum members wrapped with CFRP outside aluminum square members with different fiber orientation angle and thickness of CFRP, and axial collapse tests were performed fur the members. The axial collapse characteristics of the compound members were analyzed and compared with those of the respective aluminum members and CFRP members. Test results showed that the collapse of the aluminum CFRP compound member complemented unstable brittle failure of the CFRP member due to ductile characteristics of the inner aluminum member. The collapse modes were categorized into four modes under the iuluence of the fiber orientation angle and thickness of CFRP. The absorbed energy Per unit mass, which is in the light-weight aspect was higher in the aluminum CFRP compound member than that in the aluminum member and the CFRP member alone.

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References

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