Finite Element

Crash Test Dummy Family
Overview
Finite Element Analysis (FEA) has been the trend in virtual crash design over the last decade. The predictive capabilities of FEA allow engineers to fully understand a crash event in a virtual environment, thus limiting the number of physical tests that need to be executed and thus saving costs. Since 1995, Humanetics has supplied the crash safety CAE community with innovative virtual dummies available in the non-linear structural codes LS-DYNA, PAM-CRASH, RADIOSS and ABAQUS. Humanetics develops both physical and virtual dummies, and the synergy between these product lines guarantees that models are of the highest quality and easy to use. We also offer FEA modeling consultancy services.
 
Quality
Accuracy, robustness and user friendliness are key in our development process. We are committed to work with you to constantly improve our models, based on your experience. As proof of our quality, the German PDB (Partnership for Dummy technology and Biomechanics, a consortium of German car manufacturers) has formed a partnership with Humanetics to base frontal impact simulations fully upon using our standard dummy models.
Humanetics is the only company in the world that has a full portfolio of both the physical crash test dummies as well as their numerical counterparts. We have direct access to complex geometry and material data. Our research and development involved in the manufacturing of physical crash test dummies feeds directly into our models, resulting in high quality performance.
 
Ease of Use
Our models are supplied in your preferred structural code. This means you can use your existing pre- and post processors, and your engineers don’t need specialized training to work with our dummy models. Instead, they can get right down to business – solving crash safety issues.
Our models come in a variety of unit systems to suit the user. By default, we develop in S2 (mm ton s) and S3 (mm kg ms) unit systems but any other system can be supplied upon request, at no extra charge. With each model, the following tools and documents are provided:
Dummy Positioning File: Allows for positioning the dummy exactly according to the test setup.
Data Extraction Macro: Allows for automated extraction and plotting of injury output data.
User’s Manual: Describes the model content, recent updates, injury output extraction information and positioning functionality.
Technical Report: Describes the material, component, sub-assembly and full dummy modeling and validation.
 
Worldwide Standard
With the ever increasing performance of computers and significant reduction of CPU cost, the traditional constraint of finite element analysis (longer runtimes) has disappeared. Taking advantage of SMP and MPP processing capability at no extra charge, Humanetics dummy models have become the global standard and are now in use at over 100 customer sites worldwide, ranging from the largest OEM to the smallest engineering consultancy firm.
 
 
Model Development
When we develop a model, we aim for the highest standard. All the components of the dummy are modeled explicitly – the physical geometry is replicated down to the smallest component. We distinguish five stages in our development process:
 
1 Geometry Modeling
Using CAD, laser and X-ray technology, the 3D surfaces of the dummy interior and exterior components are accurately created.
 
 
 
2 Material Modeling
Using a combination of pure tension/compression, pure shear, stress relaxation, shear frequency sweep and dynamic impact tests, the non-linear and rate dependent materials are characterized.
 
3 Component and Sub-Assembly Validation
Using component tests, the behavior of each individual part and the interactions between parts are validated. Usually this is done by drop or pendulum tests.
 
          
Single Rib Compression             PDB Thorax Impact
 
 
 
4 Full Dummy Validation
Using standard certification and additional sled tests at full dummy level, the model is validated for typical crash environments.
           
Thorax Certification Test                      PDB Sled Test
 
5 QA and Release
Performing simulations of severe impacts, the model is checked for instabilities and overall quality. After passing this stage, the model is released.
 
 
More Information
For more information please contact