气候变化领域集成服务门户(CCPortal): The Effect of a Liquid Phase on Force Distribution During Deformation in a Granular System

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DOI	10.1029/2020JB019771
	The Effect of a Liquid Phase on Force Distribution During Deformation in a Granular System
	Ladd C.R.; Reber J.E.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	Two-phase systems, where one phase is solid and the other is fluid, are widespread in nature. Examples include reservoir rocks holding vital fluids like water or petroleum, slurries of partially crystallized magmas, fluids migrating along faults filled with fault gouge, and even the semibrittle crust. Previous studies of two-phase systems have shown that the fluid phase plays an important role in deformation localization and dynamics (e.g., Higashi & Sumita, 2009, https://doi.org/10.1029/2008JB005999; Reber et al., 2014, https://doi.org/10.1002/2014GL059832). Here, we present results from experiments investigating the influence of a fluid phase on force distribution in a granular media during simple shear. We use photoelastic polyurethane discs as the granular or solid phase and a linear viscous silicone as the fluid phase. The photoelastic property of the discs allows for direct observation and measurement of force magnitude and distribution. We compare the two-phase experiments to granular experiments without silicone. The addition and percentage of the fluid phase has a strong impact on the force distribution and the overall force chain orientations. In the two-phase system, the force chains form parallel to the shear plane and only rotate to the principal stress direction with an increase in strain. Locally, the fluid phase can support forces and terminate force chains over an extended period of time. Our results are in line with findings from numerical studies investigating the formation of slow slip events, proposing that these events are the result of dynamic interactions between solid and viscous phases. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	analog model; force chains; force distribution; granular material; two-phase material
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/187706
作者单位	Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, United States
推荐引用方式 GB/T 7714	Ladd C.R.,Reber J.E.. The Effect of a Liquid Phase on Force Distribution During Deformation in a Granular System[J],2020,125(8).
APA	Ladd C.R.,&Reber J.E..(2020).The Effect of a Liquid Phase on Force Distribution During Deformation in a Granular System.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Ladd C.R.,et al."The Effect of a Liquid Phase on Force Distribution During Deformation in a Granular System".Journal of Geophysical Research: Solid Earth 125.8(2020).