人湿尺骨干的冲击压缩实验研究  

Impact Compressive Experiment of Human Fresh Ulnar Compact Bone

作　　者：王玉梅[1] 郑一鸣[2] 

机构地区：[1]西安市红十字会医院创伤骨科,710054 [2]海南省琼山市人民医院骨伤科,571100

出　　处：《美中国际创伤杂志》2009年第2期5-8,共4页U.S.Chinese International Journal of Traumatology

摘　　要：目的：探讨人湿尺骨密质骨在高应变率下的力学性能及其分布规律。方法：用分离式Hopkinson压杆（sHPB）技术对人湿尺骨密质骨进行了应变率在ε=1．2×10^3／s条件下的冲击压缩试验。结果：尺骨密质骨在高应变率下的力学性能随其纵向位置变化而呈现出中间强两端弱的分布，最强的位置约在距近端1／3处，且近端强于远端；与静态结果的比较表明，尺骨密质骨对应变率有较大的依赖性。结论：在冲击压缩力下，尺骨的两端，尤其是远端容易骨折。Objective： To investigate the mechanical properties, distributing law, and the correlation to strain rate of human fresh ulnar compact bone. Methods： Impact compressive experiment for human fresh ulnar compact bone at high strain rate ε=1.2×10^3/s by Split Hopkinson Pressure Bars （SHPB） was performed. Results： The mechanical properties of human fresh ulnar compact bone varied along the longitudinal direction, the ultimate stress, breaking strain and dynamic compressive modulus at middle section were stronger than those at both ends, the strongest site occurs nearly at the junction of proximal and middle third, and the properties at the proximal end was much higher than that at the distal end. The ultimate stress at high strain rate was largely dependent on strain rate. The constitutive relationship for human fresh ulnar compact bone at high strain rate was also discussed in this paper. Conclusion： Under impact compression, the ulna is easy to get a fracture at both ends, especially at distal end.

关 键 词：尺骨 冲击响应 应变率 

分 类 号：R318.01[医药卫生—生物医学工程]