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Software Features New DYNAFOLD Feature for Airbag Folding Simulation

8/9/2017—Engineering Technology Associates, Inc. (ETA) announced the release of Inventium 2017 R1 today. The release includes PreSys, ETA’s finite element modeling software, and VPG, mechanical system analysis plugins. Available immediately through ETA and its worldwide distribution network, substantial updates to the software have been implemented in the release for finite element modeling, meshing, geometry, solver compatibility, Post-Processing and a new ‘Geometry Cleanup’ function was added to significantly improve mesh quality. Additionally, this release also includes DYNAFOLD, a very exciting new feature for Airbag Folding, in VPG/Safety.

The DYNAFOLD feature is used to simulate the folding process of an airbag, providing various folding methods and folding tools for the user. It allows the user to generate folded airbag models using LS-DYNA solver calculations and it simulates the real folding process very precisely. It can effectively shorten research and development time and reduce cost for the manufacturer.

It provides seven fold types commonly used by the manufacturers. The user can define the fold methods and these fold methods can be combined arbitrarily. The folding methods are thin folds, roll folds, concertina folds, zigzag folds, scrunch folds, compress folds and trunk folds.

In addition, DYNAFOLD supports user-defined folding methods. The user can use five tools, which are provided in the software to create his/her own folding tool. Users can also read in a tool model with the ‘Import Tool’ function and then define their movements.

Inventium 2017 R1 is the latest release of the Inventium software that includes PreSys and the VPG Modules (Structure, Safety, Drop Test and Fluid Structure Interaction). A core solution for finite element analysis engineers, PreSys is a cost-effective software tool, which also interfaces with popular CAD software products such as CATIA, NX, ProEngineer, Solidworks and AutoCAD. It allows product development engineers and simulation specialists to access design data, quickly create complex finite element models and create insightful simulations.

Building upon its initial release in June of 2010 and subsequent releases in 2012 and 2014 and 2016, PreSys now offers added functionality and broader potential with its 2017 R1 Release. The software tool is now available on the Windows platform for 64-bit machines, directly through ETA and its distributor network. To find out more, please visit

About Engineering Technology Associates, Inc. (ETA)
Advanced product development engineers, working as structural analysts for the world’s largest automotive manufacturers, established Engineering Technology Associates, Inc. (ETA) in 1983. ETA’s expertise in the areas of vehicle durability, NVH, metal forming, crashworthiness, occupant safety and product design have provided an intimate knowledge of the challenges and needs of the product development engineer. Proactive in the creation and implementation of new analysis methods and software, ETA is the developer of DYNAFORM, PreSys and VPG. For further information about ETA and its products, please visit or call (248) 729-3010.




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