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FDA Review of Implantable Medical Devices Requries Both Physical Testing and Finite Element AnalysisT. Kim ParnellThe United States Food and Drug Administration requirements for Class III implantable medical devices requires a 10 year life, or approximately 400 million cycles of service. High cycle testing of complete prototype devices to 400 million cycles can take months to complete. Crucial information is obtained in far less time by combining accelerated testing with FEA of the component. This approach saves time by performing the design iterations and comparisons using FEA. [more...] Crushing of Underground Pipe due to a Surface ExplosionT.Kim Parnell, Robert D. CaligiuriThis presentation gives a summary of one part of the investigation of the PEPCON plant explosion in Henderson, Nevada. This incident occured in 1989. One key issue was whether the buried 16" natural gas pipeline was pressurized when the explosion occurred. [more...] Fracture Mechanics Fundamentals.T.Kim ParnellStanford presentation with summary of Fracture Mechanics principles with some applications. [more...] Rail Cracking due to Residual Stress from Manufacturing and Heat TreatingStephen P. Andrew, T. Kim Parnell, Robert D. Caligiuri, Robert A. SireThe manufacturing and heat treatment process for steel rail (railroad rail) can result in unwanted residual stresses. If these web residual stresses are allowed to become tensile and too large in magnitude, rail fracture and failure can result from the combined action of residual stresses with the train operating loads. Tensile web residual stresses cause a longitudinal web crack to open up and can serve as the driving force for increasing the crack length. [more...] Heavy Truck Crashworthiness - 180 Degree RolloverT.Kim Parnell, Christopher V. White, Shari E. DayRollover accidents involving heavy truck are often deadly. This paper presents some highlights from Phase II of the SAE Heavy Truck Crashworthiness project. The full report is in the public domain and is available as an SAE document. [more...] Chemical Process Plant Upset: Flow-induced Erosion/Corrosion of PipingStephen P. Andrew, T. Kim Parnell, Robert Caligiuri, Lawrence EiselsteinA process upset at a chlorine production facility resulted in a release that forced the partial evacuation of a nearby town. Investigations revealed that the events commenced with the failure of a shell and tube heat exchanger used to condense chlorine gas. [more...] Physical Testing for Good Analysis: Experimental Validation for Quality Analysis of Medical DevicesT.Kim Parnell[more...] Finite Element Analysis (FEA) and Design for Six Sigma (DFSS)T. Kim ParnellFinite element analysis is a powerful tool in many engineering applications. Design for Six Sigma is becoming a standard design procedure. [more...] Medical Device Development and EntrepreneurshipT.Kim ParnellIEEE-CNSV Presentation on Medical Device companies and opportunities for consulting and equity. [more...] China Business Delegation CASPA & SVSTA October 2003Kim ParnellSome highlights and wisdom from the visit to Hong Kong and the Pearl River Delta region of China [more...] Moving Barrier Rear Impact of Vehicle with Composite Natural Gas Fuel Tank (NGV)T. Kim ParnellLS-DYNA3D is used to analyze the impact of a moving barrier rear impact with a vehicle fitted with a natural gas fuel tank. The tank is high pressure (2500 psig) and the concern is over the integrity of the tank during the collision [more...] |