Kaiser effect observation in brittle rock cyclically loaded with different loading rates

Лавров, А. В.

doi:10.1016/s0167-6636(01)00081-3

Cited by 88 publications

(57 citation statements)

References 9 publications

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“…Monitoring of AE is much more common for damagecontrolled tests (Lavrov 2001;Heap et al 2009Heap et al , 2010Kendrick et al 2013;Trippetta et al 2013). It is mostly reported that the AE are not continuous during experiments, as previously presented in Fig.…”

Section: Crack Development and Measurementmentioning

confidence: 92%

“…The classical Kaiser effect is observed by several authors during damage-controlled tests, among which (Li and Nordlund 1993;Gatelier et al 2002;Lavrov 2001;Lavrov et al 2002). Heap et al (2009) observe a different manifestation of the Kaiser effect where acoustic emissions are recorded also during a part of the unloading.…”

Section: Kaiser Effectmentioning

confidence: 97%

“…In these studies, such kind of low-cycle test is used to correlate damage with variations in cohesion and mobilised friction. Some other authors investigate the evolution of the Young modulus and Poisson's ratio as representative of damage (Heap et al 2010;Trippetta et al 2013;Schaefer et al 2015;Yang et al 2015) or assess the stress history or a rock sample (Lavrov 2001). Finally, ramp signals are defined by a constant amplitude but an increasing mean stress, as represented in Fig.…”

Section: Loadingmentioning

confidence: 99%

See 2 more Smart Citations

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

Cerfontaine¹,

Collin²

2017

Rock Mech Rock Eng

281

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Section: Crack Development and Measurementmentioning

confidence: 92%

Section: Kaiser Effectmentioning

confidence: 97%

Section: Loadingmentioning

confidence: 99%

See 1 more Smart Citation

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

Cerfontaine¹,

Collin²

2017

Rock Mech Rock Eng

281

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“…This ability to memorize the highest stress level already experienced was discovered in the early 1950s and was termed the Kaiser effect (Kaiser 1953). Studies by Li and Nordlund (1993); Lavrov (2001) and Ko and Yu (2008) demonstrated the occurrence of the Kaiser effect also in mineral construction materials like stones or concrete.…”

Section: Introductionmentioning

confidence: 99%

Kaiser effect in historic timber elements

et al. 2013

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Timber elements are major structural and architectural components in historic buildings and at the same time belong to the category of materials vulnerable to degradation. The recovery of 150-year old timber beams from a roof of a historic building made possible the nondestructive investigation of their response to cyclic loading. The experimental study carried out using the acoustic emission technique provided evidence that historic wood shows the load memory known as the Kaiser effect. The effect was observed for different loading and unloading time windows. The observations open up a new perspective for the determination of defects in wooden objects and constructions, important for assessing their possible structural instability. Kaiser-Effekt in historischen HolzbalkenZusammenfassung Holz ist ein wichtiger tragender und architektonischer Baustoff in historischen Gebäuden, aber gehört gleichzeitig zur Kategorie zerstörungsanfälliger Materialien. An 150 Jahre alten Holzbalken aus dem Dach eines historischen Gebäudes konnte deren Verhalten bei zyklischer Belastung zerstörungsfrei untersucht werden. In Laboruntersuchungen konnte mittels Schallemissionsanalyse nachgewiesen werden, dass historisches Holz das als Kaiser-Effekt bekannte Erinnerungsvermögen an frühere Belastung aufweist. Dieser Effekt wurde bei unterschiedlichen Belastungs-und Entlastungszyklen beobachtet. Diese Ergebnisse eröffnen neue Perspektiven hinsichtlich der Bestimmung von Schäden in Holzbauteilen und -konstruktionen, was für die Beurteilung eventueller baulicher Instabilität wichtig ist.

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“…Acoustic emission events are fewer before yield and gradually become more active during the period of postyield, and then the AE cumulative count and the cumulative number of energy have the singular points obviously in the case of the stress peak [8,9]. The characteristics of AE are analyzed under the unloading confining pressure, and then the failure characteristics and the mechanism of rock burst 2 Shock and Vibration are discussed with the granite unloading confining pressure test on acoustic emission under different loading paths [7,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical and Acoustic Emission Characteristics of Rock Samples under Different Stress Paths

Qin

Sun

Liu

et al. 2018

Shock and Vibration

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A series of tests on characteristics of acoustic emission have been performed on sandstone under uniaxial, conventional, and triaxial conditions and the unloading confining pressure path. The failure mode of rock specimen has been scanned by CT and a threedimensional reconstruction was made. The differences on characteristics of AE, mechanics, and the failure mode of sandstone during the failure process under three paths are studied. The results show that the deformation of rock specimen is bigger, and axial strain and circumferential strain have a deformation platform at peak point of stress under the unloading confining pressure path. Characteristics of AE ringing are significantly affected by the confining pressure and stress path. AE ringing counts peak value, and accumulative ringing on the breaking moment as well as cumulative release energy is higher, which indicates that the rock failure is more violent under the unloading confining pressure path. The failure mode of rock specimen was dominated by shear failure under the conventional triaxial stress path. The tension failure is the main form at a lower initial value of unloading confining pressure, and the shear failure is more prominent at a higher initial value of unloading confining pressure.

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Kaiser effect observation in brittle rock cyclically loaded with different loading rates

Cited by 88 publications

References 9 publications

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

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

Kaiser effect in historic timber elements

Experimental Study on Mechanical and Acoustic Emission Characteristics of Rock Samples under Different Stress Paths

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