What does VFT® provide for the User?
How does a product designer implement VFT®?
the structure to be welded:
- Structure Geometry
- Weld Type
- Weld Material Properties
- Torch Speed
- Structure Material Properties
- Number of Weld Passes
The solid model developed by the user through standard CAE/CAD packages will have a Finite Element (FE) mesh generated for the simulation.
This FE Mesh, along with the properties described above, will be input through the solution process via a graphical user interface (GUI). (Figures on the right illustrate VFT® process flow)
What does the product designer receive from VFT®?
This type of information permits the designer to employ control strategies (e.g. weld sequencing and clamping) to reduce or eliminate distortions and residual stress states induced by welding, which ultimately leads to longer design life for the final product. Furthermore, the weld residual stresses can be used to enhance fatigue and stress corrosion cracking predictions.
Through a more recent US DOE Small Business Innovative Research (SBIR) program, Engineering Mechanics Corporation of Columbus, (Emc2), has adapted VFT® so that small- and medium-size enterprises (SME) can have cost effective access to the tool to improve their products and realize the full benefits of its use.
Prior to this SBIR effort, VFT® had been out of the reach of most SMEs because of the need for high end expensive computational resources and highly trained and experienced staff. Emc2’s modifications now provide SMEs with a readily available tool via the high performance computing (HPC) facility at the Ohio Supercomputer Center (OSC) within the Ohio State University (OSU), which is easy to use and low cost.
At OSC, VFT® is found on the AweSim website making it simple for SMEs to seamlessly and securely access all modules of VFT®. AweSim is an OSC program to help lower barriers to entry for HPC- based modeling and simulation (M&S) especially for SMEs. It acts as the equivalent HPC version of various ‘App Stores’ that exist for Smartphone platforms and employ a userfriendly, tailored format for a diverse set of end users at affordable prices. Three main AweSim components have been developed for user access: App Kit for building apps; App Runtime for running apps; and App Store for locating and buying apps (See Figure on the right). Additionally, a range of training options is offered.