항공우주시스템공학회지 (Journal of Aerospace System Engineering)

  • 제16권1호
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  • Pages.12-16
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  • 2022
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  • 1976-6300(pISSN)
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  • 2508-7150(eISSN)
항공우주시스템공학회 (The Society for Aerospace System Engineering)
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인장 시험을 이용한 열가소성 복합재료 유도용접 전단강도 평가방법에 대한 고찰

A Study on the Evaluation Method of Lap Shear Strength for Induction Welding of Thermoplastic Composites using Tensile Test

  • 백인석 (국립경상대학교 기계항공공학부, ERI) ;
  • 이석순 (국립경상대학교 기계항공공학부, ERI)
  • Baek, Inseok (School of Mechanical and Aerospace Engineering, Gyeongsang National University, ERI) ;
  • Lee, Seoksoon (School of Mechanical and Aerospace Engineering, Gyeongsang National University, ERI)
  • 투고 : 2021.01.06
  • 심사 : 2021.12.26
  • 발행 : 2022.02.28
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⟨ 이전 논문 다음 논문 ⟩

초록

유도 용접은 비접촉식으로 깨끗하고 빠른 공정으로 현재 주목받고 있다. 하지만 열가소성 수지는 전자기장에 영향을 받지 않기 때문에 유도 용접은 서셉터(Susceptor)라는 발열체가 필요하다. 고품질 접합을 목표로 연구가 진행되고 있지만, 결국 발열체라는 이물질이 들어가기 때문에 기준이 필요하다. 시편의 제작과 시험은 ASTM D5868에 근거하여 진행된다. 본 논문에서 평가 기준은 용접된 접합면의 상태와 기공률, 전단강도로 총 3가지를 근거로 판단할 것을 제안한다. 용접되는 접착면은 용융되고 냉각되면서 고형화가 되기 때문에 급격한 온도 변화는 기공을 발생시킬 수 있다. 또한 가열이 균일하지 않다면 원하는 성능을 기대하기 힘들다. PA6 (CF 30%) 엔지니어링 플라스틱을 이용하여 서셉터 제작과 유도 용접 그리고 성능 검증으로 진행하였다.

Currently, Induction welding is attracting attention as a non-contact, clean and fast welding process. However, since thermoplastic resins are not affected by electromagnetic fields, induction welding requires a heating element called a susceptor. Researches are being conducted with the aim of achieving high-quality bonding, however, the factor of a heating element is an issue, hence the need to set a standard. Specimen fabrication and testing are conducted according to ASTM D5868. In this study, we propose that the evaluation criteria be judged on the basis of three factors; the condition of the welded joint surface, void content, and lap shear strength. Since the adhesive surface to be welded melts and solidifies as it cools, rapid temperature changes can generate pores. In addition, if the heating is not uniform, it is difficult to expect the desire performance. Using PA6 (CF 30%) thermoplastic, susceptor fabrication, induction welding and performance verification were conducted.

키워드

과제정보

이 연구는 2021년도 한국연구재단의 이공학개인기초연구지원사업(기본연구지원사업, '2020R1F1A106598311')과 경상국립대학교 연구년제 연구교수 연구비 지원에 의한 연구임

참고문헌

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