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CLARE M. RIMNAC EMAE PROFESSOR OF MECHANICAL & AEROSPACE ENGINEERING Director, Musculosketeal Mechanics and Materials Laboratories 620 GLENNAN BUILDING [email protected]; 216-368-6442 APPROACH Mechanical testing of materials; physically-inspired constitutive modeling of materials; finite element analyses of structures Microstructural and ultrastructural identification of damage and microstructural and ultrastructural characterization of materials using light, scanning and transmission electron microscopy; fourier transform infrared microspectroscopy COLLABORATIONS Mechanical performance and modeling of musculoskeletal tissues Mechanical performance and modeling of inert and resorbable orthopaedic implant materials Implant retrieval/failure analysis of total joint replacements RECENT ACCOMPLISHMENTS Developed physically-based constitutive models of conventional and new crosslinked ultra high molecular weight polyethylene formulations that predict fracture of total joint replacement components. Case Medical School Departments of Orthopaedics and Neurosurgery Exponent Inc. and Drexel University, Philadelphia, PA RESEARCH SPONSORS National Institutes of Health, Musculoskeletal Transplant Foundation, Orthopaedic Industries Characterized the resistance to fatigue crack growth of 2D Graph 4 UHMWPEs in a physiologically-relevant fluid environment at 37C 10-1 10-2 da/dN (mm/cycle) RESEARCH AREAS AND APPLICATIONS Sterilized - 23degC air Annealed - 23degC air Remelted - 23degC air Sterilized - 37degC PBS Annealed - 37degC PBS Remelted - 37degC PBS 10-3 10-4 10-5 10-6 10-7 0.6 0.7 0.8 0.9 1 2 K ( MPa. m0.5 ) 3 4