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

  • 제22권1호
  • /
  • Pages.52-63
  • /
  • 1998
  • /
  • 1226-4873(pISSN)
  • /
  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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충격자의 형상 및 재질변화에 따른 펄스형성에 관한 연구

A study on the impact pulse analysis with various shapes and materials of impactor

  • 이영신 (충남대학교 기계설계공학과) ;
  • 김동진 (충남대학교 대학원 기계설계공학과) ;
  • 강근희 (국방과학연구소) ;
  • 오종수 (국방과학연구소)
  • Lee, Yeong-Sin (Dept. of Mechanical Design Engineering, Chungnam National University) ;
  • Kim, Dong-Jin (Dept. of Mechanical Design Engineering, Graduate School of Chungnam National University) ;
  • Gang, Geun-Hui (Agency for Defense Development) ;
  • O, Jong-Su (Agency for Defense Development)
  • 발행 : 1998.01.01
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초록

The impact programmer for impact test was designed and the impact analysis was conducted. The effects of the material and geometric parameters on the impact force and pulse shape were investigated. The impact characteristics were examined by experimental and finite element method. The impact test was conducted with free drop impact tester. The ABAQUS/Explicit 5.5 version was used for finite element analysis. The geometric parameters of the conical and dome type impact programmer were analyzed. The polyurethane impact programmers were fabricated and tested. The effects of the hardness and thickness of the impact programmer were studied. The peak acceleration and time duration of impact programmer have close correlation with the hardness, impact energy and thickness of the impactor. The experiment was good agreement with analytical predictions. The impact pulse shape generated with polyurethane impact programmer was half sine shape. The maximum impact force was proportional to impact energy. The impact acceleration was decreased with thickness of impact programmer. The maximum impact time duration level was about 2 msec.

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