气候变化领域集成服务门户(CCPortal): Elastic Strain Effects on Wave Scattering: Implications for Coda Wave Interferometry (CWI)

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DOI	10.1029/2019JB018974
	Elastic Strain Effects on Wave Scattering: Implications for Coda Wave Interferometry (CWI)
	Azzola J.; Schmittbuhl J.; Zigone D.; Lengliné O.; Masson F.; Magnenet V.
发表日期	2020
ISSN	21699313
起始页码	no
卷号	125 期号:3
英文摘要	Coda Wave Interferometry (CWI) is a highly sensitive monitoring technique built on the sensitivity of elastic coda waves to small changes in a diffusive medium. However, a clear connection between the physical processes involved in the evolution of the medium and the time changes observed by CWI has not been clearly described yet. Here, we quantify the impact of elastic deformation on CWI measurements at laboratory scales. We compare experimental results from wave scattering measurements during a uniaxial compression test to those of a numerical approach based on the combination of two codes (SPECFEM2D and Code_Aster), which allows us to model wave propagation in complex diffusive media during its elastic deformation. In both approaches, the reversible time delays measured between waveforms increase with the elastic deformation of the sample. From the numerical modeling, we gain insight to the relative contributions of different physical effects on the CWI measurement: local density changes from volumetric strain, the deformation of scatterers, and acoustoelastic effects. Our results suggest that acoustoelastics effects related to nonlinear elasticity are dominant. ©2020 The Authors.
英文关键词	Acousto-elastic effects; Modelled Elastic deformation; Modelled wave propagation in diffuse material; Strain influence on Coda Wave Interferometry in laboratory experiments; Strain measurements from Coda Wave Interferometry
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/187907
作者单位	Institut de Physique du Globe de Strasbourg/EOST, University of Strasbourg/CNRS, Strasbourg, France; ICUBE, University of Strasbourg/CNRS, Illkirch, France
推荐引用方式 GB/T 7714	Azzola J.,Schmittbuhl J.,Zigone D.,et al. Elastic Strain Effects on Wave Scattering: Implications for Coda Wave Interferometry (CWI)[J],2020,125(3).
APA	Azzola J.,Schmittbuhl J.,Zigone D.,Lengliné O.,Masson F.,&Magnenet V..(2020).Elastic Strain Effects on Wave Scattering: Implications for Coda Wave Interferometry (CWI).Journal of Geophysical Research: Solid Earth,125(3).
MLA	Azzola J.,et al."Elastic Strain Effects on Wave Scattering: Implications for Coda Wave Interferometry (CWI)".Journal of Geophysical Research: Solid Earth 125.3(2020).