  Modeling of cancellous bone has important applications in the detection and
treatment of fatigue fractures and diseases like osteoporosis. In this paper,
we present a fully coupled multiscale approach considering mechanical,
electrical and magnetic effects by using the multiscale finite element method
and a two-phase material model on the microscale. We show numerical results for
both scales, including calculations for a femur bone, comparing a healthy bone
to ones affected by different stages of osteoporosis. Here, the magnetic field
strength resulting from a small mechanical impact decreases drastically for
later stages of the disease, confirming experimental research.
