摘要
骨生物力学是生物力学的主要研究方向之一,但目前关于国人股骨和胫骨的力学参数尚很少见。我们测试了中国青年男性的股骨和胫骨三个不同方向-轴向、周向、径向的拉伸和压缩弹性模量。测得三个不同方向的压缩弹性模量:股骨分别为5.8±0.34、3.4±0.17、2.1±0.18 GPa;胫骨分别为6.1±0.36、3.5±0.17、2.1±0.18GPa。拉伸弹性模量:股骨分别为15.6±1.21、9.8±0.73、5.4±0.52 GPa;胫骨分别为16.7±1.09、10.3±0.70、5.6±0.49 GPa。还测试了股骨、胫骨拉伸和压缩时的破坏强度。得到轴向、周向、径向压缩时的破坏强度:股骨分别为150±9.3、111±6.5、110±7.1 M Pa;胫骨分别为191±12.3、140±6.3、123±8.3 M Pa。拉伸时的破坏强度:股骨分别为115±9.6、82±6.8、78±7.3M Pa;胫骨分别为143±8.7、110±8.3、97±6.4M Pa。另外,通过曲线拟合的方法,对股骨和胫骨应力松弛试验的结果进行处理,得出当骨的变形保持不变时,应力与时间满足下面的对数函数关系:F=A*Blogt,其中A为初始荷载,B为拟合材料参数,股骨和胫骨的拟合材料参数B分别为0.985和0.987。
The tension moduls and compression modulus of Chinese tibia and femur of male in three different directions, namely axial, circumferential and radial directions, were tested in our experiments. The measured compression moduli are 5.8±0. 34, 3.4±0. 17, 2.1±0.18 GPa respectively for femur, and 6.1±0.36, 3.5±0. 7, 2.1±0. 18 GPa respectively for tibia; the measured tension moduli are 15.6±1.21, 9.8±0.73, 5.4±0.52 GPa respectively for femur, and 16.7±1.09, 10.3±0. 70, 5.6±0.49 GPa respectively for tibia. The tension and compression ultimate strengths of femur and tibia were tested, too. The measured compression ultimate strengths are 150±9. 3, 111±6.5, 110±7. 1 MPa respectively for femur, and 191±12. 3, 140±6. 3, 123±8. 3 MPa respectively for tibia ; the measured tension ultimate strengths are 115± 9.6, 82± 6.8, 78± 7. 3 MPa respectively for femur, and 143 ± 8. 7, 110 ± 8. 3, 97 ± 6. 4 MPa respectively for tibia. Furthermore, the stress-relaxation experiments were conducted. The relation between loading and time during the experiments were obtained by the method of curve fitting. They meet the logarithm function：F=A ＊ B^logt; A is the initial load, and B is the fitting material parameter. For femur, B is equal to 0. 985; for tibia, B is equal to 0. 987.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2006年第3期535-538,共4页
Journal of Biomedical Engineering
基金
国家自然科学基金资助课题(1007205)
关键词
弹性模量
应力松弛
各向异性
Elastic modulus Stress-relaxation Anisotropy
