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Interface Shear Response of JSC-1A, GRC-3, and JSC-Mars1 Regolith Simulants

机译:JSC-1A,GRC-3和JSC-Mars1 Regolith模拟物的界面剪切响应

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The response of soil-structure interfaces is of primary importance for the construction and design of infrastructure because all loads, whether static or dynamic, are transferred to the ground through these interfaces. This paper presents a laboratory investigation that characterizes the interface shear response of two lunar simulants, JSC-1A and GRC-3, and one Martian simulant, JSC-Mars1. Through a series of axial and torsional interface shear tests, this investigation thoroughly studies the effect of continuum surface roughness magnitude on the interface response and demonstrates that the JSC-1A simulant mobilizes the largest interface strength, followed by JSC-Mars1 and then GRC-3. Furthermore, the results indicate that torsional shearing against regolith mobilizes larger peak interface friction angles than those mobilized during axial shearing. A methodology for isolating the interface friction response from the passive resistance components is presented, and it is shown that the passive resistances are responsible for the difference in mobilized axial and torsional interface strength. A discussion of the implications of interface response on space exploration, as well as extraterrestrial immobility and infrastructure development, is included. (c) 2018 American Society of Civil Engineers.
机译:土-结构界面的响应对于基础设施的建设和设计至关重要,因为所有载荷(无论是静态还是动态)都通过这些界面传递到地面。本文提出了一项实验室研究,以表征两种月球模拟物JSC-1A和GRC-3和一个火星模拟物JSC-Mars1的界面剪切响应。通过一系列的轴向和扭转界面剪切测试,该研究彻底研究了连续表面粗糙度对界面响应的影响,并证明JSC-1A模拟物调动了最大的界面强度,其次是JSC-Mars1,然后是GRC-3 。此外,结果表明,与轴向剪切过程相比,对硬质合金的扭转剪切能产生更大的峰值界面摩擦角。提出了一种从被动阻力组件中分离界面摩擦响应的方法,结果表明,被动阻力是造成动员轴向和扭转界面强度差异的原因。讨论了界面响应对空间探索以及地外固定和基础设施发展的影响。 (c)2018年美国土木工程师学会。

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  • 来源
    《Journal of aerospace engineering》 |2018年第2期|04018003.1-04018003.12|共12页
  • 作者单位

    Georgia Inst Technol, Sch Civil & Environm Engn, 790 Atlantic Dr, Atlanta, GA 30332 USA;

    Univ Calif Davis, Dept Civil & Environm Engn, 3116 Ghausi Hall, Davis, CA 95616 USA;

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