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APPROACH Static and cyclic mechanical testing measurements of materials; constitutive modeling of materials; finite element analyses of structures
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APPROACH • Static and cyclic mechanical testing measurements of materials; constitutive modeling of materials; finite element analyses of structures • Microstructural and ultrastructural damage identification and microstructural and ultrastructural characterization of materials using light, scanning and transmission electron microscopy; fourier transform infrared microspectroscopy • COLLABORATIONS • Departments of Orthopaedics and Neurosurgery, CWRU Medical School • Rush Presbyterian Medical School, Chicago, IL • Exponent Failure Analysis, Philadelphia, PA • Drexel University, Philadelphia, PA • Mt. Sinai Medical School, New York, NY • RESEARCH SPONSORS • NIH, OREF, Orthopaedic Industries CLARE M. RIMNAC EMAE ASSOCIATE PROFESSOR OF MECHANICAL & AEROSPACE ENGINEERING and Director, Musculosketeal Mechanics and Materials Laboratories 620 GLENNAN BUILDING cmr10@po.cwru.edu; 216-368-6442; 216-368-3007 (fax) • RESEARCH AREAS AND APPLICATIONS • 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 to predict wear and damage of total joint replacement components. • Characterized the kinetics • of fatigue crack growth • of microcracks • and of macrocracks • in human cortical bone. • Microcracks decelerate • and arrest at • microstructural • barriers. Fatigue • crack propagation • resistance of • macrocracks are • reduced by age-related • changes in bone • tissue. Fatigue crack growth of older female bone tissue is less than younger female bone tissue. Damage retrieved PE total knee and total hip replacement components
KEY WORDS cmr10 Rimnac mechanical engineering biomechanics biomaterials orthopaedic implants bone tissue ultra high molecular weight polyethylene fatigue and fracture ultrastructural and microstructural damage retrieval/failure analysis