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EXPERIMENTAL AND NUMERICAL MODELING OF BUCKLING INSTABILITY OF LASER SHEET FORMING

EXPERIMENTAL AND NUMERICAL MODELING OF BUCKLING INSTABILITY OF LASER SHEET FORMING. Authors: Z. Hu , R. Kovacevic , M. Labudovic RICH DEWEY Sept. 21, 2009. Introduction: Function of Paper. To discuss the buckling instability that can happen when laser bending sheet metal.

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EXPERIMENTAL AND NUMERICAL MODELING OF BUCKLING INSTABILITY OF LASER SHEET FORMING

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  1. EXPERIMENTAL AND NUMERICAL MODELING OF BUCKLING INSTABILITY OF LASER SHEET FORMING Authors: Z. Hu, R. Kovacevic , M. Labudovic RICH DEWEY Sept. 21, 2009

  2. Introduction: Function of Paper • To discuss the buckling instability that can happen when laser bending sheet metal. • Present data from a series of experiments and compare them to data from 3-D FEM(finite element modeling) simulation.

  3. Introduction: Why Important? • Laser bending of sheet metal is becoming very proper in precision manufacturing. • Over 25 different variables have been identified that impact the end result, making computer simulation very difficult. • Author selects a very specific method of laser bending and is able to produce similar results with his simulation.

  4. Introduction: References (1)

  5. Introduction: References (2)

  6. Background

  7. Background: CNC Laser Cuttters/Benders

  8. Selected Method: Buckling

  9. Models and Design Application • Technical Application to Course

  10. Models and Design Application • Governing equations/parameters used to set up the FEM simulation:

  11. Models and Design Application • FEM Model

  12. Results: Experimental Equipment

  13. Results: Data Tables

  14. Results: Data Tables • FEM model results vs experimental results

  15. Results: Data Tables • Example of wide range of experimental results

  16. Conclusions: • “A 3-D FEM simulation system has been developed that includes a nonlinear transient indirect coupled thermal-structural analysis accounting for geometric and material nonlinearities. The buckling deformation, the bending angle, the distribution of stress-strain, the temperature, and residual stress can all be obtained by computer simulation.”

  17. Conclusions: • Practical Industrial use? • Model not flexible enough to be used in a variety of situations • Technical advancement? • Helpful, step in the right direction • Industries most impacted? • Any high presicion sheet metal forming or bending, most electronics manufacturers.

  18. Article Quality: Keep it

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