THE MECHANICAL PROPERTIES AND FAILURE MODE OF SIMULATED LUNAR ROCK BY IN SITU TEMPERATURE REAL-TIME ACTION OF LUNAR-BASED

Hai-Chun Hao, Ming-Zhong Gao, Yan Wu, Xue-Min Zhou, Xuan Wang, Zheng Gao and Zhao-Ying Yang
Additional contact information
Hai-Chun Hao: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Shenzhen University, Shenzhen 518060, P. R. China†Shenzhen Key Laboratory of Deep Underground, Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, P. R. China
Ming-Zhong Gao: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Shenzhen University, Shenzhen 518060, P. R. China†Shenzhen Key Laboratory of Deep Underground, Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, P. R. China
Yan Wu: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Shenzhen University, Shenzhen 518060, P. R. China†Shenzhen Key Laboratory of Deep Underground, Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, P. R. China
Xue-Min Zhou: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Shenzhen University, Shenzhen 518060, P. R. China†Shenzhen Key Laboratory of Deep Underground, Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, P. R. China
Xuan Wang: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Shenzhen University, Shenzhen 518060, P. R. China†Shenzhen Key Laboratory of Deep Underground, Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, P. R. China
Zheng Gao: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Shenzhen University, Shenzhen 518060, P. R. China†Shenzhen Key Laboratory of Deep Underground, Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, P. R. China
Zhao-Ying Yang: State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Shenzhen University, Shenzhen 518060, P. R. China†Shenzhen Key Laboratory of Deep Underground, Engineering Sciences and Green Energy, Shenzhen University, Shenzhen 518060, P. R. China

FRACTALS (fractals), 2024, vol. 32, issue 04, 1-18

Abstract: To achieve in situ condition-preserved coring of the lunar surface and deep lunar rocks and a return mission, it is necessary to explore the mechanical properties and failure modes of simulated lunar rocks that have physical and mechanical properties approximately equivalent to those of mare basalt under simulated lunar temperature environments ( − 120∘C to 200∘C). To this end, real-time uniaxial compression tests were conducted on simulated lunar rocks under corresponding in situ temperature conditions, and the mechanical properties, deformation characteristics, micromorphology, and failure modes were analyzed. Based on the macroscopic analysis, as the environmental temperature decreases, the uniaxial compressive strength, peak strain, and peak strain duration of simulated lunar rocks exhibit a nonlinear increasing trend, with maximum increases of 33.00%, 36.16%, and 49.25% from those at room temperature, respectively. Based on microscopic analysis, the intergranular fractures run through the entire samples under the environmental temperature. As the environmental temperature increases, intergranular and transgranular fractures coexist, and layered fractures appear at high temperatures. At the same time, some samples exhibit undulating and stepped morphologies caused by shear stress. For the fractal dimension of a simulated lunar rock main fracture surface, the fractal dimension of the actual angle and the corrected angle increase first and then decrease with increasing environmental temperature, and the maximum error of the two is only 1.84%. The overall fractal dimension ranges from 2.02 to 2.28, and the fractal dimension under real-time high-temperature conditions is higher than that under real-time low-temperature conditions. In addition, the failure mode of the simulated lunar rocks under real-time in situ temperature changes is a combined tensile–shear failure mode with shear failure (primary) and tensile failure (secondary). The above research results are expected to be applied to in situ condition-preserved coring in extreme lunar environments and provide a scientific basis for the design and development of in situ condition-preserved coring robot systems for the extreme environment of deep space.

Keywords: In Situ the Moon Temperature; Real-Time Temperature Changes; Uniaxial Compression; Fractal Dimension; Failure Mode (search for similar items in EconPapers)
Date: 2024
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218348X24400206
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:fracta:v:32:y:2024:i:04:n:s0218348x24400206

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218348X24400206

Access Statistics for this article

FRACTALS (fractals) is currently edited by Tara Taylor

More articles in FRACTALS (fractals) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().