The development of the apparatus for structure strength test of cervical vertebra

本文介绍了一种颈椎结构强度试验装置，并利用该装置对颈椎的力学行为进行了研究。试验装置由4个直线导向执行器、2个交流伺服电机、4个负载传感器和2个扭矩传感器组成。为了得到电机的纯弯矩，控制器对力矩产生的反作用力进行了抵消。对猪颈椎骨进行了弯曲试验。本研究得出以下结论：1) c.v.弯曲；弯曲力矩随反力的减小而减小，并通过试验装置得到了纯弯矩。2) c.v.压缩；实验结果表明，在压缩载荷的作用下，弯曲力矩与压缩载荷相结合，极易造成弯曲弯曲。

In this research, we describe an apparatus for the structure strength test of cervicalp vertebra and investigate the mechanical behavior of cervicalp vertebra (C.V) by using this appratus. The test apparatus is composed of 4 linear guide actuators, two AC servo motors, 4 load and 2 torque sensors. In order to obtain the pure bending moment of C.V, the reaction loads caused by the torque are canceled by the controllers. Bend tests are carried out on a cervicalp vertebra of pig.The following conclusions are obtained in this research.1)Bending of C.V ; The bending torques decrease with an decreasing reaction load and the pure bending moments of C.V are obtained by using the test apparatus.2)Compression of C.V ; The compression load on the C.V brings about the large reaction load on the vertical axis of a longitudinal C.V. The experimental result shows that the C.V is buckled easiy by the bending torque on C.V conbined with the compression load.