人脊柱腰椎松质骨归一化应力松弛蠕变函数  

Experimental study on the reduced stress relaxation creep function of the cancellous bones of lumbar spine

作　　者：程杰平[1] 孙海峰[1] 马洪顺[2] 孙庆[3] 

机构地区：[1]吉林大学第二医院,长春130041 [2]吉林大学南岭校区工程力学系,长春130022 [3]吉林大学中日联谊医院,长春130031

出　　处：《医用生物力学》2005年第2期88-90,100,共4页Journal of Medical Biomechanics

摘　　要：目的研究正常国人新鲜尸体腰椎L5椎体松质骨的粘弹性力学性质,为临床提供生物力学参数。方法在ShimadzuAUTOGRAPH电子万能试验机上对L5椎体松质骨试样进行压缩应力松弛、蠕变实验。结果得到了L5椎体应力松弛、蠕变数据和曲线,还得出了归一化应力松弛、归一化蠕变函数及曲线取得了回归系数a、b、c、d值。结论L5椎体7200s应力松弛量为0.261MPa、7200s蠕变量为0.217%。Objective Research on the viscoelastic properties of L5 lumbars got from fresh corpse of our country. Methods Make the stress relaxation test and the creep test on them with Shimadzu AUTOGRAPH electronic universal testing machine. Results The stress relaxation and reduced creep data and the curves of L5 were obtained. The reduced stress relaxation and reduced creep function and its curves were also gained, together with the regressive coefficient a,b,c and d. Conclusion The L5 spine's stress relaxation quantity is 0.261MPa and the creep quantity is 0.217%.

关 键 词：脊柱 腰椎 松质骨 粘弹性 

分 类 号：R318.01[医药卫生—生物医学工程]