Geometric Characteristics of TJ-1 Lunar Soil Simulant Particles
LIN Cheng-xiang, LING Dao-sheng, ZHONG Shi-ying, JIANG Zhu-jin
2016, 37 (3):
451-456.
DOI: 10.12068/j.issn.1005-3026.2016.03.031
The geometric characteristics of particle is an important physical property of granular material, as well as a principal aspect in determining their mechanical properties. The TJ-1 lunar soil simulant particles used in soft landing model tests were scanned and photographed by using a stereo microscope. Then, a digital imaging processing software was used to statistically analyze the geometric characteristics of particles of each grain size group, and aspect ratio, circularity and roundness of particles were obtained to provide the experimental data for further research of the relationship between geometric characteristics of particles and soil physical and mechanical properties. The research results show that the TJ-1 lunar soil simulant particles have irregular structures of corners, cheicers and sawtooth. Consequently, the surface of particles is relatively rough. Big size particles have obvious honeycomb-like pore structure. The shape of particles differs from each other, the main shapes are long striped, quasi-triangle and quasi-quadrangle. Finally, the geometric characteristics of TJ-1 lunar soil simulant particles is compared to the one of real lunar soil particles.
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