Medical Devices, Biotech, Failure Analysis, Mechanical Eng, Materials, Reliability, Expert WitnessT. Kim Parnell, PhD, PE
is a Professional Mechanical Engineering
consultant with strong experience in a number of technology areas. He holds PhD and MSME degrees from Stanford University in Mechanical Engineering and a BES from Georgia Tech. He specializes in the mechanical engineering design and behavior of Biomedical Devices, Superelastic and Shape Memory Metals (Nitinol), Bioabsorbable Polymers, Composites, Fiber-Reinforced Materials, Electronics, and Consumer Products
. Dr. Parnell consults actively in these areas using finite element analysis and other advanced technologies to improve designs, to perform failure analysis, and to improve reliability.
Dr. Parnell served on the Mechanical Engineering faculty at Santa Clara University from 2010-2012 and was previously a Visiting Associate Professor at Stanford University. He lectured in the Stanford Composites Design Program, and is a coach and mentor for the innovative Stanford Biodesign Program. He has worked for companies including MSC Software, Rubicor Medical, Exponent Failure Analysis Associates, SST Systems, ATT Bell Laboratories, Stanford University, and General Motors.
Dr. Kim Parnell has experience as a medical device patent litigation expert, as an expert in product liability matters (including heavy truck crashworthiness), and frequently serves as an expert witness and litigation consultant. He has testified in both trial and deposition, and has also authored expert reports. Dr. Parnell's litigation support services are available to attorneys for both plaintiff and defense.
Areas of Expertise
Selected Professional Memberships
- Patents and Intellectual Property
- Medical Devices
- Medical Instrumentation
- Composite Materials
- Finite Element Analysis (FEA) & Simulation
- Cell Phones, Personal Electronic Devices
- Gas Leaks, Pipe Failure, Vapor Cloud Explosions
|Shape Memory MaterialsHeavy Truck CrashworthinessConsumer ProductsProduct Design RefinementPiping, Pressure VesselsFailure AnalysisReliability|
View Dr. Parnell's Consulting Profile
- Registered Professional Engineer (Mechanical), California
- ASME (American Society of Mechanical Engineers), Fellow
- SAE (Society of Automotive Engineers), Member
- IEEE (Institute of Electrical & Electronics Engineers), Senior Member
- ASM International, Member
- SMST (Shape Memory and Superelastic Technologies), Member
Rail residual stress distributions can be complex and variable in nature, as different manufacturing techniques produce varying stress magnitudes and distributions. To evaluate the effect of residual stresses on rail integrity, an analysis technique was sought that could quantify the effect of these stresses on web crack propagation.
The computer program LS-DYNA3D was used to simulate the behavior of a specific, though representative, heavy truck cab-over tractor-trailer vehicle during a full 180° rollover event. These simulations provide a key component in the development of a physical testing procedure for evaluating structural integrity and occupant crash protection system designs in heavy trucks.
The United States Food & Drug Administration (FDA) requirements for Class III implantable medical devices requires a 10 year life, or approximately 400 million cycles of service.