Pietruszczak S, Inglis D, Pande G N
Department of Civil Engineering, McMaster University, West Hamilton, Ontario, Canada.
J Biomech. 1999 Oct;32(10):1071-9. doi: 10.1016/s0021-9290(99)00096-2.
A fracture criterion for bone tissue is proposed. Bone material is considered to be anisotropic and its properties are described by invoking the concept of directional variation of porosity. The fracture criterion is expressed as a scalar-valued function of the stress tensor and it incorporates an orientation-dependent distribution of compressive/tensile strength. The proposed mathematical framework is applied to a numerical analysis of fracture in the proximal femur due to a fall from standing height. The risk of fracture is assessed in the context of two different porosity distributions, simulating a healthy and an osteoporotic bone.
提出了一种骨组织的断裂准则。骨材料被认为是各向异性的，其特性通过引入孔隙率方向变化的概念来描述。断裂准则表示为应力张量的标量值函数，并纳入了与方向相关的抗压/抗拉强度分布。将所提出的数学框架应用于对从站立高度跌落导致的股骨近端骨折的数值分析。在两种不同孔隙率分布的情况下评估骨折风险，分别模拟健康骨骼和骨质疏松骨骼。
