Deformation characteristics at the contact boundary in cylinder compression process

원기둥 압축 공정에서 접촉 경계면의 변형 특성

  • Min, Kyung-Ho (Department of Tool & Mould Design, Yuhan University) ;
  • Ko, Byung-Du (Department of Tool & Mould Design, Yuhan University) ;
  • Lee, Ha-Seong (Department of Tool & Mould Design, Yuhan University)
  • 민경호 (유한대학교 금형설계학과) ;
  • 고병두 (유한대학교 금형설계학과) ;
  • 이하성 (유한대학교 금형설계학과)
  • Published : 2014.12.01

Abstract

In this study, surface deformation patterns have been investigated by the rigid-plastic finite element method for friction factor test in solid cylinder compression process. AA1100 and AA6063 aluminum alloys, which show different work hardening characteristics respectively, have been adopted as model materials used for analysis. The main objective of this study is to provide the deformation mechanics in detail in solid cylinder compression process, especially at the die/workpiece interface that is closely related with the frictional conditions. For this reason, solid cylinder compression process has been numerically analyzed. The surface flow patterns at the contact boundary have been analyzed in terms of surface expansion, surface expansion velocity, pressure distributions exerted on the die surface along the die surface. By defining bulge factor, barreling phenomenon also have been examined with calibration curves to verify their effects on the surface flow pattern that is important for evaluating the frictional condition at the interface.