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以改进的SHPB被动围压试验方法 ,研究了水泥砂浆石在准一维应变下的动态力学响应。分析讨论了试验结果与围压套筒材料性质、几何尺寸等的关系。得到了水泥砂浆石的动态泊松比、动态杨氏模量、动态压缩强度。分析了试验中的摩擦力效应及其对围压下轴向应力应变关系的影响 ,完成了对材料弹性常数的修正。
With the improved SHPB passive confining test method, the dynamic mechanical response of cement mortar under quasi-one-dimensional strain was studied. The relationship between the test results and the properties of confining pressure sleeve material, geometric dimensions and so on is analyzed and discussed. The dynamic Poisson’s ratio, dynamic Young’s modulus and dynamic compressive strength of cement mortar were obtained. The effect of friction in the test and its influence on the axial stress-strain relationship under confining pressure were analyzed, and the correction of material elastic constants was completed.