Abstract
Sheet buckling, a form of instability, is one of the major considerations in the design of part shape, die geometry and processing parameters of sheet metal forming. In this study, an adaptive enrichment meshfree method is developed to capture wrinkling and post-buckling behavior in sheet metal forming. A three-dimensional meshfree continuum approach is applied to the large deformation of plate/shell structures. A stress-based wrinkling predictor is used to predict the onset of buckling within effective compressive regions. Enrichment particles with a proper enrichment function are inserted/deleted in those regions to capture the buckling mode and therefore post-buckling behavior. For verification of the simulation results, a high-resolution wedge strip test is designed to study the onset and post-buckling behavior of a sheet under different boundary conditions.
Original language | English (US) |
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Pages (from-to) | 2569-2590 |
Number of pages | 22 |
Journal | Computer Methods in Applied Mechanics and Engineering |
Volume | 194 |
Issue number | 21-24 SPEC. ISS. |
DOIs | |
State | Published - Jun 10 2005 |
Funding
This work is made possible by a support from NSF under the grant DMI-0115079 to Northwestern University, which is greatly appreciated.
Keywords
- Adaptive analysis
- Buckling
- Enrichment
- Meshfree
- Sheet metal forming
ASJC Scopus subject areas
- Computational Mechanics
- Mechanics of Materials
- Mechanical Engineering
- General Physics and Astronomy
- Computer Science Applications