Effective bulk moduli under plain strain to two-phase unidirectional composites reinforced by anisotropic hollow and solid fibers

Applying polydisperse approximation the new exact analytical relationships for the effective bulk modules under plane strain are obtained for anisotropic trabecular bones taking into account biological age and a porosity. The forecasted changing of bulk modules under plane strain deals with age adaptation of bone's structures. This is a basis for formulating the new methods of the warning and medical treatment of fractures, the complexes of gymnastic exercises, and individual selection of loading modes for akinetic patients.