Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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A study on strength reinforcement of one-sided reinforced hybrid laminates made of 22MnB5 and carbon fiber reinforced plastics

22MnB5 / 탄소섬유 강화 플라스틱으로 제작된 단면 보강 하이브리드 적층판의 강도 보강에 관한 연구

  • Lee, Hwan-Ju (Molding & Metal Forming R&D Department, Korea Institute of Industrial Technology) ;
  • Jeon, Young-Jun (Molding & Metal Forming R&D Department, Korea Institute of Industrial Technology) ;
  • Kim, Dong-Earn (Molding & Metal Forming R&D Department, Korea Institute of Industrial Technology)
  • 이환주 (한국생산기술연구원 금형성형연구부문) ;
  • 전용준 (한국생산기술연구원 금형성형연구부문) ;
  • 김동언 (한국생산기술연구원 금형성형연구부문)
  • Received : 2022.06.13
  • Accepted : 2022.06.30
  • Published : 2022.06.30
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Abstract

As environmental regulations are strengthened, automobile manufacturers continuously research lightweight structures based on carbon fiber reinforced plastic (CFRP). However, it is difficult to see the effect of strength reinforcement when using a single CFRP material. To improve this, a hybrid laminate in which CFRP is mixed with the existing body structural steel was proposed. In this paper, CFRP patch reinforcement is applied to each compression/tensile action surface of a 22MnB5 metal sheet, and it was evaluated through a 3-point bending experiment. Progressive failure was observed in similar deflection on bending deformation to each one-sided reinforced specimen. After progressive failure, the tensile reinforced specimen was confirmed to separate the damaged CFRP patch and 22MnB5 sheet from the center of the flexure. The compression reinforced specimen didn't separate that CFRP patch and 22MnB5, and the strength reinforcement behavior was confirmed. In the compression reinforced specimen, damaged CFRP patches were observed at the center of flexure during bending deformation. As a result of checking the specimen of the compression reinforcement specimen with an optical microscope, It is confirmed that the damaged CFRP patch and the reinforced CFRP patch overlapped, resulting in a concentrated load. Through the experimental results, the 22MnB5 strength reinforcement characteristics according to the reinforcement position of the CFRP patch were confirmed.

Keywords

Acknowledgement

본 연구는 산업통상자원부의 '항공우주부품기술개발사업' 지원으로 진행하였습니다. (과제번호 : 20007444)

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