Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Automatic Elimination of Free Edge for Sheet Metal Forming Analysis

박판성형해석을 위한 자동 프리에지 제거에 관한 연구

  • 유동진 (대진대학교 컴퓨터응용기계설계공학과)
  • Published : 2004.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

A new approach for the automatic elimination of free edges in the finite element model for the analysis of sheet metal forming processes is presented. In general, the raw finite element model constructed from an automatic mesh generator is not well suited for the direct use in the downstream forming analysis due to the many free edges which requires tedious time consuming interactive graphic operations of the users. In the present study, a general method for the automatic elimination of free edges is proposed by introducing a CAD/CAE hybrid method. In the method a trimmed parametric surface is generated to fill the holes which are orginated from the free edges by using the one step elastic finite element analysis. In addition, mesh generation algorithm is suggested which can be used in the general trimmed surface. In order to verify the validity of the proposed method, various examples including actual automobile sheet metal parts are given and discussed.

Keywords

References

  1. Annals of the CIRP v.40 Development of CAE system for auto-body panel forming die design by using 2-D and 3-D FEM A. Makinouchi;E. Nakamachi;T. nakagawa https://doi.org/10.1016/S0007-8506(07)61993-3
  2. Int. J. Mech. Sci. v.36 Rigid-plastic finite element analysis of sheet metal forming processes using continuous contact treatment and membrane elements incorporating bending effect D. J. Yoo;I. S. Song;D. Y. Yang;J. H. Lee https://doi.org/10.1016/0020-7403(94)90030-2
  3. J. Mater. Process. Tech. v.45 Investigation into tool surface description for finite element analysis of three-dimensional sheet metal forming processes D. Y. Yang;D. J. Yoo;I. S. Song;J. H. Lee https://doi.org/10.1016/0924-0136(94)90351-4
  4. In Proc. VDI Explicit intergration schemes and contact formulations for thin sheet forming K. Schewizerhof;J. O. Hallquist;T. Altan(et. al.)(ed.)
  5. 한국소성가공학회지 v.9 no.2 박판 성형 해석을 위한 자동 툴격자 생성에 관한 연구 유동진;윤정환
  6. IEEE Trans. Pattern Anal. Mach. Intell v.14 A Method for registration of 3-D shapes P. J. Besl;N. D. Mckay https://doi.org/10.1109/34.121791
  7. Computer Graphics v.26 Decimation of triangle meshes J. Schroeder;J. Zarge;W. Lorensen https://doi.org/10.1145/142920.134010
  8. The Visual Computer v.15 Filling n-sided regions with NURBS patches L. Piegl;W. Tiller https://doi.org/10.1007/s003710050163
  9. Computer-Aided Design v.10 Recursively generated B-spline surfaces on arbitrary topological meshes E. Catmull;J. Clark https://doi.org/10.1016/0010-4485(78)90111-2
  10. 한국정밀공학회지 v.21 no.4 폴리곤 기반 역공학 시스템의 구멍메움에 관한 연구 전용태;박광현;노형민;최영
  11. J. Mater. Eng. Perf. v.4 Finite-Element Analysis and Design of Binder wrap for Automobile Sheet Metal Parts Using Surface Boundary Condition I. S. Song;D. J. Yoo;J. W. Yoon;D. Y. Yang;H. Huh;J. H. Lee https://doi.org/10.1007/BF02649592
  12. Computer Graphics & Geometric Modeling for Engineers B. Vera Anand
  13. 한국정밀공학회지 v.17 no.3 쿼드 트리를 이용한 일반적인 3차원 트림곡면에서의 유한요소 자동 생성 유동진;윤정환