For linear elastic problems we utilize sophisticated bimaterial fracture specimens to develop a relationship between energy release rate and crack tip mode mix. The overall goal of these studies is to determine loosening mechanisms for cemented implants and to develop design guidelines to reduce the risk of loosening. Experimental fatigue studies are performed and fractographic analyses is used to related void size and location with fatigue life. Experimental and finite element analysis of lumbar, thoracic, and cervical spinal motion segments with and without implant systems.
Goals are to evaluate implant systems and determine indications for surgical treatment.
Experimental investigations of carpal bone motion using servo-hydraulic wrist motion simulator. We perform kinematic analysis and visualization of carpal bone motion in normal and surgically altered wrists using solid models of bones developed from CT scans. Motion of the carpal bones is then simulated based on the position and orientation information provided by sensors attached to the individual bones. Goals are to understand normal behavior of bones in the wrist and to determine the role of carpal ligaments in providing stability. Structural finite element analyses of primary and revision total joint replacement systems using a parametric approach.