MpCCI Mapper

The crash behavior of relevant components does not only depend on design geometry and material properties, but is also influenced by manufacturing history. A failure can be caused by local thickness reduction or residual stress peaks which are a result of the stamping process. This failure can limit the functionality of the entire component. In particular the local hardening step can induce gradients in the phase proportions or influence residual stresses – and thus influence the dynamic behavior of the crash part.

MpCCI Mapper allows to check the geometric compliance of two models by calculating the local distances between them. The (automatic) mesh alignment helps to adjust the positions of two models if they are not in a non-conformal coordinate system. A robust mapping algorithm enables the transfer of various physical quantities (with nodal-, element- or shell-layer based locations) for all standard shell element and mesh types. The mapping works for different integration types as well as for different number of integration points in thickness direction for source and target model.

By using a so-called »back-mapping validation« the user can check and estimate the influence of locally incompatible mesh discretizations on the mapping quality. In a similar way the user may compare experimental data (e.g. from forming analysis tools like Atos, Argus, or Autogrid) with simulation results. The MpCCI Mapper can provide local quantity difference images, which then can be used to adjust the parameters of the forming simulation.

Concept

The MpCCI Mapper comes with a graphical user interface where all relevant parameters for the mapping can be set. The usage of the tool is quite simple: after selecting the models and parts some choices concerning algorithms and parameters have to be made.  The immediate visualization of the results makes it possible to detect model errors or bad mapping results due to parameter problems. The user can identify the critical areas and start a new mapping process.

The graphical user interface of the MpCCI Mapper is split up in four major region. Located on left of the window is the main viewport where loaded models and quantities can be interactively displayed. Above the viewport a list of buttons form the so called 'toolbar‘ where basic operations of the MpCCI Mapper are linked. Nearby the viewport a panel region is displayed where the mapping, the list of meshes and parts, the validation of mapping and also certain quantities can be analyzed. At the bottom of the window a single button is present which is responsible for starting mapping, validation or analysis processes.

MpCCI Mapper uses a k-nearest-node mapping algorithm (default k = 4) that combines robustness with data smooting. At times where averaging of certain entities is not wanted or when data smoothing shall be increased MpCCI Mapper allows to adjust the number of data points used for interpolation.

GUI - MpCCI Mapper
© Photo Fraunhofer SCAI

Graphical user interface of MpCCI Mapper "This model has been developed by The National Crash Analysis Center (NCAC) of The George Washington University under a contract with the FHWA and NHTSA of the US DOT"

This model has been developed by The National Crash Analysis Center (NCAC) of The George Washington University under a contract with the FHWA and NHTSA of the US DOT

Major Features

  • Automatic Model Positioning
  • Mapping
  • Validation
  • Analysis
  • Post Processing

File Interfaces


The MpCCI Mapper supports most of the leading file formats for forming/stamping, structural analysis, and crash behaviour. The MpCCI Mapper also supports a growing number of formats for (photogrammetric) measurement tools.

Further interfaces are under development. If you are interested to map your own file formats through MpCCI Mapper we would be happy to support you.

 

Supported Simulation Disciplines and Codes

Forming

  • LS-Dyna
  • PAMStamp
  • AutoForm
  • RADIOSS
  • Indeed
  • Forge

Crash

  • LS-Dyna
  • PAMCrash
  • RADIOSS
  • Abaqus
  • ANSYS Mech.
  • MSC.Nastran

Welding

  • Abaqus
  • ANSYS Mech.
  • Sysweld

Measurement

  • Argus / Aramis
  • Atos
  • Autogrid
  • STL

 

 

Supported Quantities

Mechanical

  • thickness
  • stress
  • strain
  • plastic strain
  • pressure
  • local material properties

Thermal

  • temperature

Release Notes

Version 4.4

  • Volume to shell element mapping algorithm improvement
  • Mapping of Indeed results now supports quantity STRESS
  • RADIOSS state format supported for writing
  • Interfaces to codes ANSYS and Forge added
  • Added additional alignment options in batch mode (-coarsealign and -finealign)
  • Slicing to plot over unwinded model length is now setup from target model extension
  • Display of vectorial quantities by length and direction
  • OpenMP version improvements

Version 4.3

  • Volume to volume and volume to shell element mapping support
  • Added support of volume elements in LSDyna reader (c.f section 4.3)
  • Converter AutoForm R4 (A213 732 0716) .csv to LSDyna keyword (c.f section 4.2)
  • Allow model alignment in batch mode (c.f section 3.13)
  • Fixed automatic result file detection in batch mode
  • Configurable view background color (c.f section 3.2.3)
  • Display of quantiy PLASTIC_STRAIN changed from average to maximum element value