FEA optimises artificial knee

When orthopedic manufacturer DePuy was trying to develop a new artificial knee joint, one of the critical design goals was the optimising of the contact area between the upper and lower portions of the joint. By increasing contact area, the company hoped

Rather than investigating contact primarily with pressure sensitive film as they had done in the past, the DePuy engineers used Ansys FEA to determine the interaction between the top and bottom segments of the joint. Analysis results were conveyed back to the designer who used the information to revise the solid model of the joint components. A key benefit was that the images were available sooner since no prototype was needed, so decisions could be made about the design immediately.

DePuy reports that use of FEA has helped to create a new implant with twice as much contact area compared to its previous model.