Prediction of rock hardness and drillability using acoustic emission signatures during indentation

Jung, S.J.; Prisbrey, Keith; Wu, G.

doi:10.1016/0148-9062(94)90159-7

Cited by 24 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hardness is linearly related to the compressive strength for many rocks and cement-based materials (Szwedzicki 1998;Winslow 1984;Igrashi et al 1996). For the relationship between indentation hardness and uniaxial compressive strength of rock materials, the following correlation (R 2 = 0.974) can be applied (Jung et al 1994):…”

Section: Localized Confinement During Indentation/impactmentioning

confidence: 99%

Fracture Toughness Effects in Geomaterial Solid Particle Erosion

Momber

2014

Rock Mech Rock Eng

View full text Add to dashboard Cite

Effects of fracture toughness on the impingement of geomaterials (rocks and cementitious composites) by quartz particles at velocities between 40 and 140 m/s are investigated experimentally and analytically. If schist is excluded, relative erosion (in g/g) reduces according to a reverse power function if fracture toughness increases. The power exponent depends on impingement velocity, and it varies between -0.64 and -1.33. Lateral cracking erosion models, developed for brittle materials, deliver too high values for relative material erosion. This discrepancy is partly attributed to stress rate effects. Effects of R-curve behavior seem to be marginal. An integral approach E R = K 1 Á E R P ? (1 -K 1 ) Á E R L is introduced, which considers erosion due to plastic deformation and lateral cracking. A transition functionsuggested in order to classify geomaterials according to their response against solid particle impingement.

show abstract

Section: Localized Confinement During Indentation/impactmentioning

confidence: 99%

Fracture Toughness Effects in Geomaterial Solid Particle Erosion

Momber

2014

Rock Mech Rock Eng

View full text Add to dashboard Cite

show abstract

“…AE techniques have proven to be very powerful for the detection and assessment of damage processes in materials under different loading conditions. For example, AE techniques have been used to study steels (11,12) , to characterise crack nucleation and growth in rocks (13)(14)(15)(16)(17) , to evaluate concrete (18)(19)(20)(21)(22) , to characterise wood products (23)(24)(25)(26) and to study cavitation in hydroturbines (27) .…”

Section: Acoustic Emission Testing Of Bituminous Mixturesmentioning

confidence: 99%

Assessment of low-temperature embrittlement of asphalt binders using an acoustic emission approach

Apeagyei¹,

Buttlar²,

Reis³

2009

Insight - Non-Destructive Testing and Condition Monitoring

View full text Add to dashboard Cite

Thin films of paving grade asphalt binders moulded on granite substrates were stressed under rapid cooling and thermal restraint conditions at temperatures ranging from 15°C to-50°C. This temperature range encompasses typical pavement temperatures in colder climates. Differential thermal contraction between the granite substrates and asphalt binders induces progressively higher thermal stress levels in the binders as the temperature drops resulting in thermal crack formation, and the corresponding release of elastic energy in the form of transient stress waves. Using piezoelectric sensors (Digital Wave, Model B-1025), a fourchannel acoustic emission (AE) system was used to record the acoustic emission activity during the binder/granite cooling process. It was observed that AE events of high energy clustered around a narrow temperature range. Assuming the cracking temperature (T cr) to be the temperature at which the AE signal energy exceeds a pre-selected threshold energy level, this AE testing approach was found to be sensitive and repeatable for predicting cracking temperatures (T cr) in four paving grade asphalt binders processed to two distinct ageing levels. The effect of binder type, ageing level and binder film thickness on cracking temperature is discussed. These AE-based T cr predictions showed strong correlations with predictions based on either the AASHTO TP1 or the MP1A protocols.

show abstract

“…The experimental results of rock drillability is shown in Table 3. The hardness of rocks is the ability of rocks to resist the intrusion or intrusion of other surfaces [11]. The experimental data are shown in Table 4.…”

Section: Evaluation Of Rock Mechanics Characteristicsmentioning

confidence: 99%

Individual Drilling Bit Design and Optimization in Mahu Area

Zhang¹,

Dang²,

Chen³

et al. 2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. There are three sets of gravels in Mahu region. The gravels formation is characterized by high heterogeneity, high abrasiveness and poor drillability. It is so difficult to optimize bit that restrict seriously the overall exploration and development process. The compressive strength, internal friction angle, and drillability of the formation are tested to check the rock mechanical characteristic profile established by logging data. The individual bit design is carried out by the 3D simulation technology. A new PDC bit type is designed to form the drill bit series for Mahu area. Single PDC bit increases 90% of the drilling footage. The trip average footage is improved 3.45 times, the horizontal section average penetration increased 34.8%. The technical achievements have greatly improved economic development benefits of Mahu region by improving drilling speed and saving drilling costs.

show abstract

Prediction of rock hardness and drillability using acoustic emission signatures during indentation

Cited by 24 publications

References 4 publications

Fracture Toughness Effects in Geomaterial Solid Particle Erosion

Fracture Toughness Effects in Geomaterial Solid Particle Erosion

Assessment of low-temperature embrittlement of asphalt binders using an acoustic emission approach

Individual Drilling Bit Design and Optimization in Mahu Area

Contact Info

Product

Resources

About