The first article is entitled “Using Probabilistic Computational Durability Modeling and Simulation to Create a Virtual Design of Experiments Based on Limited Laboratory Tests.” The authors include Ganapathi Krishnan and Robert Tryon of VEXTEC, along with S. Kulkarni, C. Clerc and K. Merdan of Boston Scientific Corporation. The high cost of fatigue testing severely limits the number of tests that can be run, therefore it is necessary to pair it with computational modeling to get the most out of the testing that is done. The authors answer the question “How do we combine results from the laboratory testing of similar designs and similar materials with state-of-the-
The second article is “Computational Models to Predict the Structural Reliability of Aerospace Systems”. Despite its title, it was presented at the conference. The medical device community wanted to see what types of computational models are being created in the aerospace industry and how they are used. Currently, the medical device industry relies primarily on testing instead of computer modeling. This article was authored by Robert Tryon, Animesh Dey, Richard Holmes and Ganapathi Krishnan, all employees of VEXTEC. In the paper, three different case studies were presented. These studies examined (1) A rotor of a gas turbine engine used on a helicopter, (2) A repair process of fan blades and (3) bearings for an auxiliary power unit.
These articles are in Volume 7, Issue 4 of the Journal of Medical Devices. Abstracts of both articles are available online at http://medicaldevices.asmedigitalcollection.asme.org/
VEXTEC (http://vextec.com) was founded in 2000 and has developed its patented technology on virtual material modeling and predicting product durability. VEXTEC offers its Virtual Life Management (VLM) Services, to a variety of commercial and government customers. In addition, it also provides failure analysis and component re-design services, which are described at http://failure-