文献类型：期刊文献

英文题名：Constitutive model analysis of Chang'e-5 ' simulated lunar regolith solidified bodies under compression

作者：Xu, Guihong Li, Yang Pang, Ronghua Chen, Ziwei Ren, Xu

第一作者：徐桂弘;Xu, Guihong

通信作者：Xu, GH[1]

机构：[1]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550001, Peoples R China;[2]Chinese Acad Sci, Inst Geochem, Guiyang 430071, Peoples R China

第一机构：贵州理工学院土木工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Civil Engn, Guiyang 550001, Peoples R China.|贵州理工学院土木工程学院;贵州理工学院;

年份：2024

卷号：21

外文期刊名：CASE STUDIES IN CONSTRUCTION MATERIALS

收录：;EI(收录号：20243917087878);Scopus(收录号：2-s2.0-85204450932);WOS:【SCI-EXPANDED(收录号:WOS:001321198600001)】；

基金：This study was supported by the Guizhou Province innovative high-level talent project (Project Code, QIAN KE HE Platform Talents-GCCQIAN KE [2023]053) , National Natural Science Foundation of China (Project Code, 52268065, 52268053) and the Natural Science Foundation of Guizhou Province (Project Code, QIAN KE HEJICHU-ZK [2022]ZHONG DIAN 027) .

语种：英文

外文关键词：Lunar regolith; Experimental; Lunar Regolith Solidified Bodies

摘要：China's Chang'e-5 spacecraft successfully collected 1731 g of Lunar regolith and returned it to Earth on December 17, 2020. In this paper, Chang'e-5 simulated Lunar regolith is used as the main material to form stable and dense solid Lunar soil structures by adding different amounts of an inorganic curing agent and water. The internal morphology, failure morphology under uniaxial compression, and stress-strain relationship of the Lunar regolith solidified samples (L-R-S- Ss) are then investigated. The damage constitutive model of the Lunar regolith cured body is analyzed according to the stress-strain curves, with the following results found. (1) Scanning electron microscopy indicates that the L-R-S-Ss contain more microvoids and microfractures, which are the main factors that lead to destruction. (2) The uniaxial failure mode of the L-R-S-Ss is primarily split failure, with both vertical and oblique cracks, with the angle between the main crack and the vertical axis being less than 30 degrees. degrees . (3) The content of the curing agent and the amount of water are important factors affecting the L-R-S-S strength. As the water content increases, the LR-S-S compressive strength tends to decrease. The L-R-S-S strength increases with increasing amount of cementitious material. (4) A cubic polynomial and a rational fraction are used to fit the ascending and descending sections of the L-R-S-S stress-strain curves, respectively, and a piece- wise constitutive model of the L-R-S-S specimens is proposed. The calculated results of the model are in good agreement with the experimental curves.