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DOI: 10.1002/2016GL068061
论文题名:
Frequency, pressure, and strain dependence of nonlinear elasticity in Berea Sandstone
作者: Rivière J.; Pimienta L.; Scuderi M.; Candela T.; Shokouhi P.; Fortin J.; Schubnel A.; Marone C.; Johnson P.A.
刊名: Geophysical Research Letters
ISSN: 0094-9142
EISSN: 1944-8873
出版年: 2016
卷: 43, 期:7
起始页码: 3226
结束页码: 3236
语种: 英语
英文关键词: Acousto-Elasticity ; Berea Sandstone ; Frequency Dependence ; Nonlinear Acoustics ; Nonlinear Elasticity ; Ultrasonic Testing
Scopus关键词: Acoustics ; Harmonic analysis ; Microstructural evolution ; Multivariant analysis ; Regression analysis ; Sandstone ; Ultrasonic testing ; Berea sandstone ; Frequency dependence ; Frequency independent ; Microstructural features ; Multivariate regression analysis ; Non-linear acoustics ; Nonlinear elastic response ; Nonlinear elasticity ; Elasticity
英文摘要: Acoustoelasticity measurements in a sample of room dry Berea sandstone are conducted at various loading frequencies to explore the transition between the quasi-static (f→0) and dynamic (few kilohertz) nonlinear elastic response. We carry out these measurements at multiple confining pressures and perform a multivariate regression analysis to quantify the dependence of the harmonic content on strain amplitude, frequency, and pressure. The modulus softening (equivalent to the harmonic at 0f) increases by a factor 2-3 over 3 orders of magnitude increase in frequency. Harmonics at 2f, 4f, and 6f exhibit similar behaviors. In contrast, the harmonic at 1f appears frequency independent. This result corroborates previous studies showing that the nonlinear elasticity of rocks can be described with a minimum of two physical mechanisms. This study provides quantitative data that describes the rate dependency of nonlinear elasticity. These findings can be used to improve theories relating the macroscopic elastic response to microstructural features. © 2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981762903&doi=10.1002%2f2016GL068061&partnerID=40&md5=372644a3be3f78217d99df722490b5b2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10105
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Geosciences, Pennsylvania State University, University Park, PA, United States

Recommended Citation:
Rivière J.,Pimienta L.,Scuderi M.,et al. Frequency, pressure, and strain dependence of nonlinear elasticity in Berea Sandstone[J]. Geophysical Research Letters,2016-01-01,43(7).
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