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Measurement of Small Cohesion of JSC-1A Lunar Simulant

机译：JSC-1A月球模拟物小内聚力的测量

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摘要

Because of the difficulty of applying low, effective confining pressure in a triaxial test, the reported small cohesion of JSC-1 A lunar simulant from past research is neither accurate nor reliable. To develop an effective way to measure the cohesion parameter, a new method was adopted and demonstrated. As the value of the critical height of a vertical cut is proportional to the cohesion of a soil, the cohesion of JSC-1 A simulant was obtained through simple calculations based on the critical height measured. Footprint demonstrations were also used to illustrate the existence of cohesion in JSC-1 A simulant, in a comparison with the photograph of footprints of astronauts on the Moon. A group of critical height tests was conducted to obtain the cohesion of lunar simulant JSC-1A for a range of densities from 1.61 to 1.96g/cm~3. It was found that the cohesion of JSC-1A simulant varies in the range from 0.0 to 1.1 kPa, in an approximately linear relationship with the soil density.
机译：由于在三轴试验中难以施加较低的有效围压，过去的研究报道的JSC-1 A月球模拟物的内聚力小，既不准确也不可靠。为了开发一种有效的内聚参数测量方法，采用了一种新方法并进行了演示。由于垂直切口的临界高度值与土壤的黏度成正比，因此基于所测得的临界高度，通过简单的计算即可获得JSC-1 A模拟物的黏度。与脚上宇航员在月球上的脚印相比较，脚印演示还被用来说明JSC-1 A模拟物内聚性的存在。进行了一组临界高度测试，以得出月球模拟物JSC-1A的内聚力，密度范围为1.61至1.96g / cm〜3。发现JSC-1A模拟物的内聚力在0.0到1.1 kPa范围内变化，与土壤密度呈近似线性关系。

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  • 来源
    《Journal of aerospace engineering》 |2013年第4期|882-886|共5页
  • 作者

    Yuru Li; Xiangwu Zeng; Allen Wilkinson;

  • 作者单位

    Dept. of Civil Engineering, Case Western Reserve Univ., 10900 Euclid Ave., Cleveland, OH 44106-7201;

    Dept. of Civil Engineering, Case Western Reserve Univ., 10900 Euclid Ave., Cleveland, OH 44106-7201;

    National Aeronautics and Space Administration Glenn Research Center, 21000 Brookpark Rd., Cleveland, OH 44135;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cohesion; Critical height; JSC-1A lunar soil simulant;

    机译：凝聚;临界高度;JSC-1A月球土壤模拟物;

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