A study of progressive failure of rock under cyclic loading by ultrasonic and AE monitoring techniques

Rao, M. V. M. S.; Ramana, Y. V.

doi:10.1007/bf01041806

Cited by 77 publications

(24 citation statements)

References 17 publications

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“…The most intense activity is measured during dilatancy and pore collapse when cracks are created and/or opened, which are noisy events. This interpretation conforms to previous results (Mogi 1966; Ohnaka and Mogi 1982; Rao and Ramana 1992).…”

Section: Discussionsupporting

confidence: 94%

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Successive cracking steps of a limestone highlighted by ultrasonic wave propagation

Couvreur

Vervoort

King

et al. 2001

Geophysical Prospecting

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A number of laboratory tests (uniaxial, triaxial and hydrostatic) have been conducted on a dry porous limestone. A conceptual model is proposed to correlate deformation and damage fields (including acoustic emission activity) with the variation of ultrasonic velocities, quality factors and energies as measures of attenuation. This correlation is presented in a stress deviator versus confining pressure diagram. In this way, the successive steps occurring in the damage process of this rock are well described. In particular, the quality factor of S‐waves distinguishes clearly the onset of the initially stable cracking, while the velocity of S‐waves and strain measurements are sensitive to dilatancy which appears later in the damage process of the limestone studied.

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Section: Discussionsupporting

confidence: 94%

“…1977; Toksöz et al . 1979; Jones and Murrell 1989), cyclic (Rao and Ramana 1992) or creep (Couvreur and Thimus 1996a) loading.…”

Section: Introductionmentioning

confidence: 99%

Successive cracking steps of a limestone highlighted by ultrasonic wave propagation

Couvreur

Vervoort

King

et al. 2001

Geophysical Prospecting

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“…On the other hand, a study questions this phenomenon for the uniaxial cyclic loading of rock (Sondergeld and Estey 1981). Deviations from the classical definition are also identified in Rao and Ramana (1992) where the number of acoustic emissions does not decrease at constant cyclic loading amplitude. Similarly, Trippetta et al (2013) observe an almost constant number of acoustic emissions during successive cycles in triaxial experiments.…”

Section: Kaiser Effectmentioning

confidence: 99%

“…Measurement of wave velocity is one of the most common (Rao and Ramana 1992;Lockner 1993;Meglis et al 1995;Brantut et al 2014;Voznesenskii et al 2017). Microscopic thin sections are also often provided (Ghamgosar and Erarslan 2016;Wang et al 2017).…”

Section: Crack Development and Measurementmentioning

confidence: 99%

Cyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives

Cerfontaine¹,

Collin²

2017

Rock Mech Rock Eng

281

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“…Wave velocity has also been used to monitor fracturing processes resulting from damage accumulation (Yukutake 1989;Chow et al 1995;Rao & Kusunose 1995;Schubnel et al 2003). In some cases, these measurements have been completed by amplitudes determined from pulse transmission experiments (Rao & Ramana 1992;Zang et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Evidence of dilatant and non-dilatant damage processes in oolitic iron ore:P-wave velocity and acoustic emission analyses

Wassermann

Senfaute

Amitrano³

et al. 2009

Geophysical Journal International

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S U M M A R YUniaxial and triaxial compression experiments were performed on oolitic iron ores to investigate damage processes. Most of these experiments included four indirect measurements of damage evolution, that is, P-wave velocity and maximum amplitude received during pulse transmission experiments, elastic properties (apparent Young´s modulus and apparent Poisson´s ratio) and acoustic emission (AE) monitoring. The mechanical behaviour deduced from strain measurements is dilatant for some samples and non-dilatant for the other samples. However, variations in elastic properties indicate damage processes for all samples. AE source mechanism analysis shows two different microscopic damage processes: (1) for dilatant rock, the development of axial extensive microcracks as well as their interaction and coalescence lead to the formation of shear macroscopic discontinuities; (2) for non-dilatant oolitic iron ore, both compressive and shear micromechanisms take place and interact with macroscopic fractures. A particular consistency between the four types of measurements employed was observed.

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A study of progressive failure of rock under cyclic loading by ultrasonic and AE monitoring techniques

Cited by 77 publications

References 17 publications

Successive cracking steps of a limestone highlighted by ultrasonic wave propagation

Successive cracking steps of a limestone highlighted by ultrasonic wave propagation

Cyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives

Evidence of dilatant and non-dilatant damage processes in oolitic iron ore:P-wave velocity and acoustic emission analyses

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