气候变化领域集成服务门户(CCPortal): Design of Sand-Based, 3-D-Printed Analog Faults With Controlled Frictional Properties

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DOI	10.1029/2020JB020520
	Design of Sand-Based, 3-D-Printed Analog Faults With Controlled Frictional Properties
	Braun P.; Tzortzopoulos G.; Stefanou I.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	Laboratory experiments with surrogate materials play an important role in fault mechanics. They can improve the current state of knowledge by testing various scientific hypotheses in a repeatable and controlled way. Central in these experiments is the selection of appropriate analog, rock-like materials. Here, we investigated the frictional properties of sand-based, 3-D-printed materials. We performed uniaxial compression tests, direct shear, and inclined plane tests in order to determine a) the main bulk mechanical parameters of this new analog material, b) its viscous behavior, c) its frictional properties, and d) the influence of some printing parameters. Complete stress-strain/apparent friction-displacement curves were presented including the post-peak, softening behavior, which is a key factor in earthquake instability. Going a step further, we printed rock-like interfaces of custom frictional properties. Based on a simple analytical model, we designed the a) maximum, minimum, and residual apparent frictional properties, b) characteristic slip distance, c) evolution of the friction coefficient with slip, and d) dilatancy of the printed interfaces. This model was experimentally validated using interfaces following a sinusoidal pattern, which led to an oscillating evolution of the apparent friction coefficient with slip. Our approach could be used for simulating earthquake-like instabilities in the laboratory and mimic the periodical rupture and healing of fault sections. Additionally, our tests showed the creation of a gouge-like layer due to granular debonding during sliding, whose properties were quantified. The experimental results and the presented methodology make it possible to design new surrogate laboratory experiments for fault mechanics and geomechanics. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	analog experiments; fault mechanics; frictional behavior; gouge layer; wear
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187172
作者单位	Institut de Recherche en Génie Civil et Mécanique, Ecole Centrale de Nantes, Nantes, France
推荐引用方式 GB/T 7714	Braun P.,Tzortzopoulos G.,Stefanou I.. Design of Sand-Based, 3-D-Printed Analog Faults With Controlled Frictional Properties[J],2021,126(5).
APA	Braun P.,Tzortzopoulos G.,&Stefanou I..(2021).Design of Sand-Based, 3-D-Printed Analog Faults With Controlled Frictional Properties.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Braun P.,et al."Design of Sand-Based, 3-D-Printed Analog Faults With Controlled Frictional Properties".Journal of Geophysical Research: Solid Earth 126.5(2021).