股骨头松质骨三维拉伸应力松弛蠕变实验研究

目的 研究正常国人新鲜尸体股骨头松质骨的拉伸粘弹性力学性质。方法 对股骨头松质骨纵向、横向、45°方向试样进行拉伸应力松弛、蠕变实验。结果 得出了股骨头松质骨纵向、横向、45°方向拉伸应力松弛、蠕变实验数据及这三个方向的归一化应力松弛函数、归一化蠕变函数及曲线;还得出了角度与应力松弛量、蠕变量关系表达式及曲线。结论 股骨头松质骨纵向应力松弛、蠕变量均大于横向和45°方向,股骨头松质骨为各向异性粘弹性材料。

EXPERIMENTAL STUDY ON THE STRESS RELAXATION AND CREEP OF THE CANCELLOUS BONE OF THE FEMORAL HEAD

Objective The viscoelastic property of the cancellous bones of the femoral head of the fresh cadaver were studied. Methods the tensile stress relaxation experiment and creep experiment were done in three directions: Longitudinal N transverse and 45 degrees. Results The data of the tensile stress relaxation and creep of three directions were reported. The reduced stress relaxation and creep functions, the curves and the irregular functions and curves of the relations between the stress relaxation and creep' s quantities and angles were also reported. Conclusion The quantities of stress relaxation and creep of the cancellous bones of the femoral head in the longitudinal direction are greater than those in the other two directions and the cancellous bone of the femoral head is an anistropic material.