Parameter Identification with LS-OPT

The use of new materials, such as plastics, composites, foams, fabrics or high-tensile steels, demands the application of highly complex material models. These material formulations are generally associated with numerous material parameters. The optimization program LS-OPT is ideally suited for identifying these parameters. In the identification process, an automatic comparison is carried out between the experimental results and the simulation results of LS-DYNA. Thereafter, the error between experiments and simulations is minimized.

 

In this seminar, a brief introduction in LS-OPT is made with a focus on the application of LS-OPT to determine material parameters. No prior knowledge about optimization or the application of LS-OPT is required.

 

Contents:

  • The optimization problem for the parameter identification

- Objective function: to minimize deviations between simulations and experiments (least-squares principle)
- Constraints
- Optimization variables
- Normalization and weighting
- Min. / max. formulation: minimizing the maximum deviation

  • Brief introduction to LS-OPT
  • Graphical User Interface (GUI)
  • Simultaneous adaptation of several experiments (e.g. tensile test, shear test and biaxial test)
  • Starting LS-DYNA simulations and job control in LS-OPT
  • Analysis and evaluation of optimization results
  • Execution of examples

 

- Jan. 2013 -

Dates
Dates Duration/days Registration Referee Language Location Fee
03.09.2019
1 day
Dr. D. Aspenberg
Linköping
4000 SEK
21.01.2020
1 day Registration
Dr. D. Aspenberg
Linköping
4000 SEK

Lecturers

Dr. D. Aspenberg
Dr. D. Aspenberg
Registration and Information

Registration and information

 

 

Contact
contact Mikael Schill
  • LS-DYNA
  • Material modeling
  • Forming Technology
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