Robustness evaluation in virtual product development


robust 7


Manufacturing tolerances, material scatter, random load or other stochastic effects cause scattering properties of components or structures that are usually of spatial distribution. To ensure your product quality, to avoid recalls or to fulfill safety requirements, you can consider these random effects by using appropriate statistical models and methods already in the design phase.

SoS supports your design process by identifying random fields and the visualization of scatter shapes. Thus, you can locate areas with a high probability of failure or variation (hot spots) and identify the causes of the scatter.


benefits 7



Visualization of statistical quantities on FEM meshes may simplify the evaluation of robustness significantly. Visualization helps in particular if the critical regions are a priori not known or if their positions vary randomly (e.g. in crash simulation, metal forming simulation, etc.). Further, visualization helps to increase the acceptance of statistical results in CAE and production departments.


features 7

Post processing window

New features in SoS 3 (since SoS 2.x)

  • Flexible and “Easy to use” work flows
  • Improved numerical efficiency
  • Limitations on FEM mesh size for random field identification dramatically relaxed
  • Simulation of random fields

General features

  • Import and export of FEM field data (element data or node data) of multiple samplings
  • Visualization of single design and statistical result values
  • Identification and visualization of the scatter shapes and their amplitudes
  • Script-based re-evaluation with changed input data
  • Batch processing on Linux
  • Treatment of failed designs, statistical outliers and eroded elements (e.g. cracks)

File formats

  • Native formats: SoS binary database, SoS script
  • Scalar parameters (e.g. varied random inputs): CSV, optiSLang
  • FEM meshes and data (e.g. from FEM simulations of parameter studies): LS-Dyna, NASTRAN, STL (AutoForm through LS-Dyna)
  • Various image file formats (e.g. photos of measurements)