Experiment on compressive strength of simulated lunar soil based on grey correlation analysis
The primary objective of the Chang'e-7 mission is to detect water ice in the permanently shadowed regions of the Moon's south pole.This study involves conducting simulation research within an Earth-based environment,preparing test samples of polar hydrous simulated lunar soil,and assessing the mechanical properties of these simulants under ultra-low temperatures.Additionally,it analyzes how various factors—including moisture content,compactness,temperature,loading rate,substrate composition,and compressive strength—interact.The results indicate that the compressive strength of the frozen lunar soil simulants increases with higher moisture content,greater compactness,and lower temperatures,while it is less influenced by variations in loading rate.The compressive strength is affected by substrate composition in the following order:100%plagioclase<90%plagioclase+10%basaltic<70%plagioclase+30%basaltic<100%basaltic lunar soil simulant.Furthermore,this study employs grey correlation analysis to explore the relationships among fundamental physical property indices such as moisture content,compactness,temperature,loading rate,substrate ratio,and compressive strength.The analysis reveals the following order of correlation strength:moisture content>compactness>temperature>substrate ratio>loading rate.This paper not only examines the preparation and mechanical properties of aqueous lunar soil but also proposes a more systematic and standardized implementation scheme.This serves as a foundational basis for understanding the characteristics of polar aqueous lunar soil,providing valuable theoretical insights and references for subsequent lunar soil simulation research..
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