StahlDat Sheet Steels for Automotive Data Module

What is it? Material test data and pedigree data for common automotive sheet steels, plus an extensible database schema so you can add your own test data.
What is in it? Test data for 36 popular automotive sheet steel grades, including elastic and plastic tests, high strain rate data, forming limit diagrams, flow curves and bulge tests. The data comes from a collaborative test program run by the German Steel Institute and a consortium of automotive OEMs and steel producers.
What is it used for? Support for crash and forming simulation.
Where does it come from? The data comes from a collaborative test program run by the German Steel Institute VDEh and a consortium of automotive OEMs and steel producers.
How can I access it? Via the GRANTA MI materials information system providing easy web browser access for browsing, searching, comparison, and export to CAE. The GRANTA MI database is extendable so that you can add your own data. Also available in CES Selector as an add-on module.

Description

The StahlDat Sheet Steels for Automotive data module is a property data resource developed by the German Steel Institute (Stahlinstitut VDEh) and a consortium of automotive OEMs and steel producers. Organizations who participated in the test program to generate this data include: Arcelor Group, Audi, BMW, DaimlerChrysler, Salzgitter, ThyssenKrupp, Voestalpine, and Volkswagen.

The database contains a comprehensive set of test data for 36 popular automotive sheet steel grades, including:

  • Sheet steel ‘pedigree’ information for all of the steels used in the test program
  • Test data: elastic, plastic, cyclic loading, high strain-rate tests, forming limit diagrams and bulge tests.
  • A re-usable GRANTA MI schema for automotive sheet steel testing which can be adapted so that you can extend the database, adding your own in-house test data without any programming
  • Detailed help files explaining how to interpret the test conditions such as strain rate, pre-stress, etc.

Test data meets the requirements of the SEP 1240  Standard for "Testing and Documentation Guideline for the Experimental Determination of Mechanical Properties of Sheet Steels for CAE-Calculations".

Exploring the low temperature, strain rate-dependent behavior of a bake hardening steel

Exploring the low temperature, strain rate-dependent behavior of a bake hardening steel.

Crash and forming simulation challenges

Good quality materials test data for crash and forming simulation is hard to find. And without material pedigree information (for example, covering the material composition, pre-stress, rolling direction) or test pedigree (data on the test temperature, strain rate, etc.) any models derived from this test data cannot be used to predict real world behavior. Getting this data, for example, by generating it in-house or via test houses, can be very costly.

Despite this high cost, this valuable data is often not put to best use. It is stored in local spreadsheets or paper reports that cannot be easily searched, compared, or made available to those who need it. How can automotive organizations store the data and make it accessible to engineers and analysts performing simulation?

All of these challenges are within an environment where automotive steels are evolving fast. To keep up, vehicle manufacturers need access to the best data in an environment where this data can be updated and then easily applied. This requires better templates and best practices for the electronic representation of crash and forming test and simulation model data.

How does the Sheet Steels for Automotive Data Module help?

The Sheet Steels for Automotive Data Module within GRANTA MI gives you:

  • Test data in which you can have confidence: compiled by leading organizations with full traceability between test results, material pedigree, and test conditions
  • The ability to quickly find, visualize, and compare results using the powerful GRANTA MI user interface
  • A test data database schema that can be extended with no programming, supporting extension of the database with data from your own in-house test programs.

GRANTA MI’s export capability means that it’s easy to configure exporters to support the conversion of this data to any simulation material card format.