Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 1999.05a
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- Pages.5-8
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- 1999
Three-Dimensional Finite Element Analysis for Extrusion of the Underframe of a Railroad Vehicle
철도차량 마루부재 압출공정의 3 차원 유한요소해석
Abstract
The present work is concerned with three-dimensional finite element analysis of the hollow section extrusion process using a porthole die. For economic computation, mismatching refinement, an efficient domain decomposition method with different mesh density for each subdomain, is implemented. The proposed method improves the computational efficiency significantly, especially fur the three-dimensional analysis of extrusion problems. As a numerical example, extrusion of the underframe part of a railroad vehicle are analyzed. For three-dimensional mesh generation of a complicated shape with hexahedral elements, a modified grid-based approach with the surface element layer is utilized. The analysis results are then successfully reflected on the industrial porthole die design.
Keywords
- Extrusion;
- Hollow Section Extrusion;
- Porthole Die;
- Railroad Vehicle;
- Rigid-Plastic Finite Element Method;
- Domain Decomposition;
- Mismatching Refinement