皮質骨の非均質構造を考慮した静的変形解析

抄録

Nonlinear Deformation Mechanism of Cortical Bone under Statical Tensile Load Osteon is the constitutive unit of cortical bone and has a composite multilayer structure consisting of co1lagen fibre bundles such as helical structures and hydroxyapatite. In this paper, the deformation mechanism of the cortical bone is simulated using a hybrid finite-element model to elucidate the nonlinear behaviour of microfractures under statical load. Numerical results are compared with experimental results obtained from a tensile test with the acoustic emission (AE)technique. It is considered that nonlinear deformation at the initial step was due to the delamination between osteons and the interstitial lamellae which connect the osteons, and due to the increase in rigidity of the osteon which was freely displaced by the delamination.