TY - JOUR
T1 - Measurement of small cohesion of JSC-1A lunar simulant
AU - Li, Yuru
AU - Zeng, Xiangwu
AU - Wilkinson, Allen
PY - 2013/10
Y1 - 2013/10
N2 - Because of the difficulty of applying low, effective confining pressure in a triaxial test, the reported small cohesion of JSC-1A 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-1A 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-1A 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 1.96 g/cm3. 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.
AB - Because of the difficulty of applying low, effective confining pressure in a triaxial test, the reported small cohesion of JSC-1A 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-1A 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-1A 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 1.96 g/cm3. 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.
KW - Cohesion
KW - Critical height
KW - JSC-1A lunar soil simulant
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U2 - 10.1061/(ASCE)AS.1943-5525.0000197
DO - 10.1061/(ASCE)AS.1943-5525.0000197
M3 - Article
AN - SCOPUS:84884638584
SN - 0893-1321
VL - 26
SP - 882
EP - 886
JO - Journal of Aerospace Engineering
JF - Journal of Aerospace Engineering
IS - 4
ER -