The software requirements for Case A are:
Products: oSP3D, optiSLang (optional), LS-DYNA (optional), and LS-PrePost (optional)
Platform: Linux or Windows
The folder metal_forming__eroded_elements contains the first variation of the previously introduced example. optiSLang is used to evaluate the robustness of the shell structure. For Case A, the following parameters are investigated:
Material parameters (random numbers)
Mass density ρ
Elastic modulus E
Poisson ratio ν
Bilinear σ - ε diagram (0-0.5)
Plastic failure (max. plastic strain σ)
Geometric parameters (random number)
Shell thickness t
The results are in the directory sampling. This directory contains the respective optiSLang bin file, the reference mesh, and the design directories. The optiSLang bin file contains the design table of the varied input parameters and some scalar output parameters (such as maximum or average strains).
Each design directory contains the subdirectories included and NW:
The files in included are used to perform the simulation with LS-DYNA.
The files in NW are the alpha-numeric output files being generated by LS-DYNA and LS-PrePost. These files demonstrate the variety of supported LS-DYNA input formats for result files.
To demonstrate most of the functionality of oSP3D as a postprocessor, eroded data are enforced in this example. All elements with a plastic strain of greater than 0.42 are eliminated during calculation. In total, only 16 designs do not have eroded data. In the tutorials, designs with too many eroded data are marked as statistical outliers and removed from the analysis. Thus, only 64 designs remain for further analysis. When analyzing meta models of optimal prognosis in optiSLang, you should take the upper bound of the plastic strain into account.
The path export prepares a consecutive simulation. To demonstrate some of the export features of oSP3D, a robustness analysis was prepared, where each design directory contains a mesh definition. oSP3D can then be used to export generated (simulated) or smoothened (from a previous analysis) random geometries into these design directories.