【摘要】 研制了与医用CT配套的便携式实时动态加载设备。该设备由加载主机、作动器、数字测控器3部分组成,拉、压最大出力为100kN,频率为5Hz,可以进行冲击、三角波、正弦波下动态拉、压试验。同时,利用新研制的加载设备对一级配混凝土进行了正弦波压缩荷载条件下的CT试验,获得了清晰的混凝土试件在动荷载作用下裂纹的开裂、扩展、贯通的全过程CT图像,结果表明所研制的加载设备为混凝土类脆性材料的动力CT试验奠定了基础。更多还原

【Abstract】 A portable real-time dynamic loading apparatus with support of medical CT is developed.This loading apparatus consists of loading host machine,actuator and digital monitoring;and the greatest pressure output of 100 kN,frequency of 5 Hz;the apparatus is available to perform the dynamic tension,compression test with impact,triangular,sine wave.In addition,the CT test is conducted by the one graded concrete sample,in the sine wave compression load condition;under dynamic loading,the crack propagation,coalescence,through the whole process of CT images are obtained.The apparatus laid the foundation for dynamic CT test of brittle materials.更多还原