Advanced design of human artificial joints requires an in-depth understanding of the dynamic interaction between the very stiff bone replacement material and the softer viscoelastic cartilage replacement material. It must take into account both the large displacement gross motions as well as the small displacement elastic responses. A co-simulation methodology has been developed in BRG LifeMOD, connecting Adams∕Solver, a large displacement multi-body dynamics code, to Marc, a nonlinear finite element code. This efficient co-simulation approach allows for each code to handle that portion of the system for which it is most capable, while adding the potential to work across multiple CPUs and operating systems as desired. The method was applied using LifeMOD∕KneeSIM to simulate an artificial knee joint, containing cobalt chromium steel and ultra-high molecular weight polyethylene contact elements, undergoing a normal walking gait to predict kinematics, forces and the resulting wear patterns.
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Design Of Medical Devices Conference Abstracts
Human Joint Simulation Using LifeMOD Co-Simulation
Eric Fahlgren,
Eric Fahlgren
MSC.Software & Biomechanics Research Group
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Mark Carlson,
Mark Carlson
MSC.Software & Biomechanics Research Group
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Andrew S. Elliott
Andrew S. Elliott
MSC.Software & Biomechanics Research Group
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Eric Fahlgren
MSC.Software & Biomechanics Research Group
Mark Carlson
MSC.Software & Biomechanics Research Group
Andrew S. Elliott
MSC.Software & Biomechanics Research Group
J. Med. Devices. Jun 2008, 2(2): 027549 (1 pages)
Published Online: June 25, 2008
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Published:
June 25, 2008
Citation
Fahlgren, E., Carlson, M., and Elliott, A. S. (June 25, 2008). "Human Joint Simulation Using LifeMOD Co-Simulation." ASME. J. Med. Devices. June 2008; 2(2): 027549. https://doi.org/10.1115/1.2932506
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