Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Investigation of Energy Absorption Property of Glass/Epoxy Composite Tubes with Bevel and Tulip Triggers

베벨 및 튤립 트리거를 갖는 유리섬유 복합소재 튜브의 에너지 흡수특성 평가

  • Kim, Jung Seok (New Transportation Systems Research Center, Korea Railroad Research Institute)
  • Received : 2017.06.07
  • Accepted : 2017.07.25
  • Published : 2017.08.15
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Abstract

Energy absorption capabilities and failure modes of circular tubes made of glass/epoxy with two trigger mechanisms were evaluated. Three types of glass/epoxy tubes were fabricated using a hand lay-up method with unidirectional and woven fabric prepregs tapes, and a filament winding method. The one end of the fabricated tubes was machined for the bevel trigger and tulip trigger. Then, crush tests were conducted at 10 mm/min loading speed, wherein the glass/epoxy tubes were crushed by a brittle fracturing mode combined with fragmentation and lamina-splaying modes. The UD glass/epoxy tubes with a bevel trigger and the filament winded tubes with a tulip trigger showed the maximum and minimum specific energy absorptions, respectively, with a difference of 9.3%. The tube with a tulip trigger exhibited a maximum reduction of 5.7% in the initial peak load; the tube with a bevel trigger showed a maximum increase of 2.9% in the specific energy absorption.

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