Ultrasonic rock sampling using longitudinal–torsional vibrations

Cardoni, Andrea; Harkness, Patrick; Lucas, Margaret

doi:10.1016/j.ultras.2009.09.036

Cited by 20 publications

(6 citation statements)

References 10 publications

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“…This type of research (exemplified in the references to this paper) is gaining in importance. Some of the works from the past and the current ones concerning drilling in space are described in publications [52][53][54][55][56][57][58][59][60][61][62][63][64][65] and in a book [66].…”

Section: Space Drilling Systemsmentioning

confidence: 99%

Feasibility Study of Low Mass and Low Energy Consumption Drilling Devices for Future Space (Mining Surveying) Missions

et al. 2021

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The global climate crisis forces the search for new ecological sources of energy and mining methods. Space mining can solve those problems, but, first, wide geological surveying space missions using drilling methods are necessary. Additionally, drilling methods will be important in geological, life searching, geoengineering, and many other studies of extraterrestrial objects. Space is becoming a new area of possible drilling applications. Designing future space drilling missions requires adapting drilling technologies, not only to the conditions of the space environment, but also to the economic and technological realities of the space industry. The possibility of constructing low mass coring devices with energy consumption below 100 W was investigated in this paper. Minimization of energy consumption and mass of a coring is essential for the device to be used in space missions, when lander instruments supplied by low power electric battery are expected to work reliably and the launch cost (depending of mass) at an economically acceptable level. Some similar devices investigated for the future space missions are known from papers listed in the references. To answer whether or not it is possible to build such devices, the authors performed initial drillability tests. The obtained results are presented in this paper.

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Section: Space Drilling Systemsmentioning

confidence: 99%

Feasibility Study of Low Mass and Low Energy Consumption Drilling Devices for Future Space (Mining Surveying) Missions

et al. 2021

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“…Test results show that the assisted UHF impact can significantly increase drilling speed and reduce drilling force. Harkness [11] and Cardoni et al [12] verified that longitudinal-torsional compound impact can effectively improve rock breaking efficiency. And this technology reduces the weight and wear of the drilling rig, which has high application value in the field of planetary rock drilling and sampling.…”

Section: Introductionmentioning

confidence: 99%

Effect of Amplitude and Confining Pressure on Granite Failure under Ultrahigh Frequency (UHF) Impact Based on Radiation Temperature

Zhang

Dajun

2022

Geofluids

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Ultrahigh frequency impact technology has great potential to break hard rocks with lower energy consumption. Based on the infrared nondestructive testing technology, the effects of load (i.e., amplitude) and boundary (i.e., confining pressure) conditions on granite damage under ultrahigh frequency impact have been investigated to promote the application of this technology in rock engineering. Experimental results demonstrate that the evolution law of the maximum radiation temperature on granite surface reflects the granite damage state. Under ultrahigh impact, granite specimens are damaged effectively with the impact amplitude exceeding 32 μm, and the failure mode of the specimen is changed by the confining pressure. Depending on Griffith’s theory, the extension angle of the fatigue crack changes from 60 to 30 degrees with increasing confining pressure. And the transverse fracture occurs in the upper part of the specimen under ultrahigh frequency impact subjected to confining pressure. This research determines the amplitude threshold of the ultrahigh frequency impact load and verifies the effectiveness of ultrahigh frequency impact technology for granite failure subjected to confining pressure.

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“…A helical slit can be used to generate a planar vibration at the tip of a transmission rod using a single longitudinal transducer. Harkness et al investigated the suppression of electrical anti-resonance in torsional vibration using a helical slit, although they did not examine elliptical vibration displacement [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Development of an ultrasonic complex vibration source that produces an elliptical vibration locus

Miyata

Asami

Miura

2022

Acoust. Sci. & Tech.

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Conventional ultrasonic welding uses linear vibrations, but welding using an elliptical locus improves welding strength. Therefore, we developed a vibration source that generates an elliptical locus using a single longitudinal vibration transducer. Although vibration sources with an elliptical locus have been reported previously, they were designed using the equivalent transmission line method. In this paper, we used the finite element method to elliptical vibration source design, and we fabricated a vibration source and measured its characteristics. Bringing the resonance frequencies of the longitudinal and torsional vibration closer together allowed vibration with an elliptical locus to be obtained at a single frequency.

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Ultrasonic rock sampling using longitudinal–torsional vibrations

Cited by 20 publications

References 10 publications

Feasibility Study of Low Mass and Low Energy Consumption Drilling Devices for Future Space (Mining Surveying) Missions

Feasibility Study of Low Mass and Low Energy Consumption Drilling Devices for Future Space (Mining Surveying) Missions

Effect of Amplitude and Confining Pressure on Granite Failure under Ultrahigh Frequency (UHF) Impact Based on Radiation Temperature

Development of an ultrasonic complex vibration source that produces an elliptical vibration locus

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