Broadband acoustic emission observations during fracture propagation in rock-like material

Arasteh, M.M.; Chudnovsky, A.; Dudley, J. W.; Glaser, Steven D.; Ma, Jianmin

doi:10.1016/s1365-1609(97)00205-0

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Acoustic emission is characterised by elastic (acoustic) waves propagating into the material following a sudden redistribution of internal stress and is a well known phenomenon in material analysis under macroscopic mechanical constraints. In general, the frequency range induced by such an excitation extends up to 0.5-1 MHz at the source (Arasteh et al, 1997), and the source time function can be approximated by a delta function with a duration of the order of a microsecond.…”

Section: Thermal Cracks and Quakesmentioning

confidence: 99%

Probing the internal structure of the asteriod Didymoon with a passive seismic investigation

Murdoch

Hempel

Pou

et al. 2017

Planetary and Space Science

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Understanding the internal structure of an asteroid has important implications for interpreting its evolutionary history, for understanding its continuing geological evolution, and also for asteroid deflection and in-situ space resource utilisation. Given the strong evidence that asteroids are seismically active, an in-situ passive seismic experiment could provide information about the asteroid surface and interior properties. Here, we discuss the natural seismic activity that may be present on Didymoon, the secondary component of asteroid (65803) Didymos. Our analysis of the tidal stresses in Didymoon shows that tidal quakes are likely to occur if the secondary has an eccentric orbit. Failure occurs most easily at the asteroid poles and close to the surface for both homogeneous and layered internal structures. Simulations of seismic wave propagation in Didymoon show that the seismic moment of even small meteoroid impacts can generate clearly observable body and surface waves if the asteroid's internal structure is homogeneous. The presence of a regolith layer over a consolidated core can result in the seismic energy becoming trapped in the regolith due to the strong impedance contrast at the regolith-core boundary. The inclusion of macroporosity (voids) further complexifies the wavefield due to increased scattering. The most prominent seismic waves are always found to be those traveling along the surface of the asteroid and those focusing in the antipodal point of the seismic source. We find also that the waveforms and ground acceleration spectra allow discrimination between the different internal structure models. Although the science return of a passive seismic experiment would be enhanced by having multiple seismic stations, one single seismic station can already vastly improve our knowledge about the seismic environment and sub-surface structure of an asteroid. We describe several seismic measurement techniques that could be applied in order to study the asteroid internal structure with one three-component seismic station.

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Section: Thermal Cracks and Quakesmentioning

confidence: 99%

Probing the internal structure of the asteriod Didymoon with a passive seismic investigation

Murdoch

Hempel

Pou

et al. 2017

Planetary and Space Science

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“…AE signals could reflect materials internal primary flaw compaction and the new crack generation and propagation. Based on acoustic emission information, the inside of the rock behaviors changes and inversion failure mechanism of the rock material can be inferred [3,4]. Acoustic emission information can be used to predict rock concrete materials compressive deformation and damage state.…”

Section: Introductionmentioning

confidence: 99%

Uniaxial Compression with Acoustic Emission Experimental Study on Rock Damage Process

Liu

Han

2012

AMM

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Acoustic emission technique is an important technique for monitoring crack propagation and failure process of rock, coal and concrete material. A uniaxial compression test with acoustic emission monitoring on coal and rock samples’ deformation and failure process were carried out. Failure precursor information of rock, coal and concrete material were studied through contrast analysis the experiment result include acoustic emission signals, strain, load correlation of sample inner crack propagation to failure process. The test provided necessary data to further understand on rock burst failure disaster. The test result provides a theoretical basis for further application of acoustic emission for prediction coal rock dynamic disaster, assessment rock and concrete structure stability and study rock concrete material failure process mechanism.

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“…Para o caso tridimensional, algumas pesquisas têm considerado indiretamente o cálculo da velocidade (AKER et al, 2014;SALINAS et al, 2010 A análise quantitativa dos sinais de EA no domínio das frequências representa um aspecto importante no estudo do processo de microfissuramento em materiais frágeis e quase-frágeis, pois o espectro de frequências contém informação associada às características dos materiais, o mecanismo de ruptura e o padrão de propagação dos sinais (WANG; ZHAO, 1986;WANG et al, 2004). Algumas pesquisas desse tipo têm sido desenvolvidas em concreto (ARASTEH et al, 1997;MCLASKEY;GLASER;GROSSE, 2007;SCHIAVI et. al., 2009), concreto com fibras (VAN HAUWAERT; DELANNAY; THIMUS, 1996) assim como em algumas rochas (HE;MIAO;FENG, 2010;JI et al, 2012;OHNAKA;MOGI, 1982).…”

Section: Introductionunclassified

Análise do microfissuramento em rochas no ensaio de compressão diametral por meio da técnica de emissão acústica

Saavedra¹,

Alejandra²

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Broadband acoustic emission observations during fracture propagation in rock-like material

Cited by 4 publications

References 2 publications

Probing the internal structure of the asteriod Didymoon with a passive seismic investigation

Probing the internal structure of the asteriod Didymoon with a passive seismic investigation

Uniaxial Compression with Acoustic Emission Experimental Study on Rock Damage Process

Análise do microfissuramento em rochas no ensaio de compressão diametral por meio da técnica de emissão acústica

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