低围压水平下QH-E模拟月壤三轴试验技术与力学特性
发布时间：2019-06-01 21:45
【摘要】：月球的低重力环境对月面浅层月壤力学特性的影响很大。利用清华大学取自吉林省靖宇县境内的火山灰岩研制出的模拟月壤(QH-E),对GCTS公司生产的STX型动/应力路径三轴仪重新配置高精度的传感器,并采取专门的试验技术,成功实施了一系列低围压水平(3.13~25 k Pa)的三轴压缩试验。试验结果表明,在低围压水平下:模拟月壤具有显著的剪胀效应;与常规围压水平(50~150 k Pa)结果相比,同一相对密度模拟月壤的峰值摩擦角更高;相对密度越高,峰值摩擦角越大;切线模量和剪切模量均随着围压和相对密度的减小而减小;剪胀角随围压的减小和相对密度的增大而增大,且低围压水平下剪胀角对围压变化十分敏感。最后就低围压下QH-E模拟月壤与饱和砂土特性的差异,及重力场环境和施加围压的介质的影响进行了讨论。
[Abstract]:The low gravity environment of the moon has a great influence on the mechanical properties of lunar shallow lunar soil. Based on the simulated lunar soil (QH-E) developed by Tsinghua University from volcanic limestone in Jingyu County, Jilin Province, the STX dynamic / stress path triaxial instrument produced by GCTS Company was reequipped with high precision sensors, and a special test technology was adopted. A series of triaxial compression tests with low confining pressure level (3.13 鈮，
本文编号：2490608
[Abstract]:The low gravity environment of the moon has a great influence on the mechanical properties of lunar shallow lunar soil. Based on the simulated lunar soil (QH-E) developed by Tsinghua University from volcanic limestone in Jingyu County, Jilin Province, the STX dynamic / stress path triaxial instrument produced by GCTS Company was reequipped with high precision sensors, and a special test technology was adopted. A series of triaxial compression tests with low confining pressure level (3.13 鈮，
本文编号：2490608
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