摘要
生命状态的骨大都作为一个整体来承受外部载荷,如走路、跑步、跳跃等,所以我们用分离式霍普金森杆(Split Hopkinson Pressure Bar,SHPB)对整体牛股骨试件(骨腔截面环上各处曲率不等,其壁厚也不等)进行了撞击测试,记录了电压和应变随时间变化的曲线。对不同厚度部位电压值,以及滞后时间进行了比较,初步得出:骨腔部位越厚压电幅值越小,同一部位点的滞后时间随冲击速度的增大而延长。
Intravital bone is subject to external load as a whole structure, such as walking, running, jumping etc. Therefore dynamic response of the whole cattle femoral bone （At every point of bone cavity section the curvature and thickness are varied. ） was studied using split Hopkinson bar （SHPB）. Curves of stress vs. Time, strain vs. Time, were all recorded and analyzed. Comparing the voltage value and delay time at different position of thickness, it got a preliminary conclusion ： the thicker the bone cavity is, the smaller the voltage value will become, and the delay time at the same spot will be lengthened when the impacting speed grows.
出处
《科学技术与工程》
2009年第15期4292-4298,4303,共8页
Science Technology and Engineering
