DOI: 10.1002/grl.50150
论文题名: Hysteretic nonlinear elasticity of Berea sandstone at low-vibrational strain revealed by dynamic acousto-elastic testing
作者: Renaud G. ; Rivière J. ; Le Bas P.-Y. ; Johnson P.A.
刊名: Geophysical Research Letters
ISSN: 0094-9295
EISSN: 1944-9026
出版年: 2013
卷: 40, 期: 4 起始页码: 715
结束页码: 719
语种: 英语
英文关键词: acousto-elasticity
; material conditioning
; nonlinear elasticity
; stress-strain hysteresis
Scopus关键词: Hysteresis
; Loading
; Materials
; Sandstone
; Strain
; Compression and tension
; Experimental evidence
; Hysteretic nonlinear
; Material softening
; Nonlinear elasticity
; Nonlinear elastics
; Quasi-static compression
; Stress-strain hysteresis
; Elasticity
; amplitude
; compression
; experimental study
; hysteresis
; loading
; nonlinearity
; parameterization
; sandstone
; strain rate
; ultrasonics
; vibration
; wave velocity
; Berea
; Lesotho
英文摘要: Through changes in wave speed of ultrasonic pulses traversing the sample, we measure variations in the elasticity of dry Berea sandstone as a function of the applied low-frequency (LF) axial strain (varied from 10-7 to 10-5). The approach, termed dynamic acousto-elasticity, is the dynamic analog of static acousto-elasticity where the wave speed is measured as a function of the applied static load. Dynamic acousto-elasticity uses low-frequency vibrational loading of smaller strain amplitude, typically below 10-4, and it includes inertial effects. At strain amplitudes around 10-6, compression and tension produce a material softening of the material. In contrast, a quasi-static compression inducing a strain between 10-4 and 10-3 leads to a material stiffening. At 10 -5 strain amplitude, elaborate hysteretic signatures of modulus strain are observed. The measurements provide the first direct experimental evidence of hysteretic nonlinear (wave amplitude dependent) elasticity in a sandstone at low dynamic strains. Key Points Each wave amplitude brings the material to a different metastable state First direct evidence of dynamic hysteretic nonlinear elasticity at low strain Nonlinear elastic parameters and hysteresis are wave amplitude dependent ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878181110&doi=10.1002%2fgrl.50150&partnerID=40&md5=c9f13a8dddaac479d2b6c71529526b7e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6559
Appears in Collections: 气候减缓与适应
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作者单位: Department of Biomedical Engineering, Erasmus Medical Center, Rotterdam, Netherlands
Recommended Citation:
Renaud G.,Rivière J.,Le Bas P.-Y.,et al. Hysteretic nonlinear elasticity of Berea sandstone at low-vibrational strain revealed by dynamic acousto-elastic testing[J]. Geophysical Research Letters,2013-01-01,40(4).