【摘要】：月球的低重力環(huán)境對月面淺層月壤力學(xué)特性的影響很大。利用清華大學(xué)取自吉林省靖宇縣境內(nèi)的火山灰?guī)r研制出的模擬月壤(QH-E),對GCTS公司生產(chǎn)的STX型動(dòng)/應(yīng)力路徑三軸儀重新配置高精度的傳感器,并采取專門的試驗(yàn)技術(shù),成功實(shí)施了一系列低圍壓水平(3.13~25 k Pa)的三軸壓縮試驗(yàn)。試驗(yàn)結(jié)果表明,在低圍壓水平下:模擬月壤具有顯著的剪脹效應(yīng);與常規(guī)圍壓水平(50~150 k Pa)結(jié)果相比,同一相對密度模擬月壤的峰值摩擦角更高;相對密度越高,峰值摩擦角越大;切線模量和剪切模量均隨著圍壓和相對密度的減小而減小;剪脹角隨圍壓的減小和相對密度的增大而增大,且低圍壓水平下剪脹角對圍壓變化十分敏感。最后就低圍壓下QH-E模擬月壤與飽和砂土特性的差異,及重力場環(huán)境和施加圍壓的介質(zhì)的影響進(jìn)行了討論。
[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，

本文編號(hào)：2490608