Nonlinear interaction phenomena between bone and pin

Interaction phenomena between bone and pin are investigated according to a contact surface strategy and assuming that bone material properties range in an elasto-plastic field. The analysis is performed by adopting a numerical model that considers coupled geometric and material nonlinearities. Particular attention is paid to the theoretical formulation of the contact problem and of the material constitutive law. Results are reported in terms of stress fields in bone material andbone-pin interface and of detachment displacements.