A technique for dynamic tensile testing of human cervical spine ligaments

被引:39
|
作者
Shim, VPW
Liu, JF
Lee, VS
机构
[1] Natl Univ Singapore, Dept Mech Engn, Impact Mech Lab, Singapore 119260, Singapore
[2] Def Med & Environm Res Inst, DSO Natl Labs, Singapore 117510, Singapore
关键词
cervical spine; ligament; strain rate; Hopkinson bar; dynamic testing;
D O I
10.1007/s11340-006-5865-2
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An experimental study is undertaken to examine the dynamic stress-strain characteristics of ligaments from the human cervical spine (neck). Tests were conducted using a tensile split Hopkinson bar device and the engineering strain rates imposed were of the order of 10(2)similar to 10(3)/s. As ligaments are extremely soft and pliable, specialized test protocols applicable to Hopkinson bar testing were developed to facilitate acquisition of reliable and accurate data. Seven primary ligaments types from the cervical spines of three male cadavers were subjected to mechanical tests. These yielded dynamic stress-strain curves which could be approximated by empirical equations. The dynamic failure stress/load, failure stain/deformation, modulus/stiffness, as well as energy absorption capacity, were obtained for the various ligaments and classified according to their location, the strain rate imposed and the cadaveric source. Compared with static responses, the overall average dynamic stress-strain behavior for each type of ligament exhibited an elevation in strength but reduced elongation.
引用
收藏
页码:77 / 89
页数:13
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