Electromechanical wave propagation in a cylindrical poroelastic bone with cavity

摘要

Due to the piezoelectric character of bone, a stress wave in a long bone causes an electrical charge motion which creates a magnetic field beyond the bone itself. In this study, a wet long bone has been modeled as a piezoelectric, transversely isotropic hollow cylinder, and an analytic solution for this electromechanical wave propagation in a long bone has been obtained for the flexural vibration. The dispersion curve for the first flexural mode and variation of the stress wave generated magnetic field as a function of cylindrical coordinates are plotted. The theoretical results are compared with in vitro experimental values as measured by a previously developed non-contacting electromagnetic device.