Ultrasonic rock sampling using longitudinal-torsional vibrations

Cardoni, Andrea; Harkness, Patrick; Lucas, Margaret

doi:10.1016/j.phpro.2010.01.018

Cited by 21 publications

(5 citation statements)

References 4 publications

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“…This arrangement appears to maximise longitudinal gain in the coring horns in much the same manner as it would maximise the performance of a step horn. Further details of this finding are presented in another publication [6]. Gain is also increased in horns with low area ratios and highly sloped columns.…”

Section: Geometric Influences On Longitudinal Gainmentioning

confidence: 59%

An ultrasonic corer for planetary rock sample retrieval

Harkness

Cardoni

Lucas

2009

J. Phys.: Conf. Ser.

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Abstract. Several recent and planned space projects have been focussed on surface rovers for planetary missions, such as the U.S. Mars Exploration Rovers and the European ExoMars. The main functions of similar extraterrestrial vehicles in the future will be moving across planetary surfaces and retrieving rock samples. This paper presents a novel ultrasonic rock sampling tool tuned in a longitudinal-torsional mode along with the conceptual design of a full coring apparatus for preload delivery and core removal. Drilling and coring bits have been designed so that a portion of the longitudinal motion supplied by the ultrasonic transducer is converted into torsional motion. Results of drilling/coring trials are also presented.

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Section: Geometric Influences On Longitudinal Gainmentioning

confidence: 59%

An ultrasonic corer for planetary rock sample retrieval

Harkness

Cardoni

Lucas

2009

J. Phys.: Conf. Ser.

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“…It mediates the analysis and transmission of data from the patient’s body contact and then outputs the data and encodes the image on the computer screen. Of course, in this research, only its mechanical behavior was studied [ 1 , 2 , 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Designing and Calculating the Nonlinear Elastic Characteristic of Longitudinal–Transverse Transducers of an Ultrasonic Medical Instrument Based on the Method of Successive Loadings

Nguyen

Huang²

2022

Materials

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This paper presents a numerical method for studying the stress–strain state and obtaining the nonlinear elastic characteristics of longitudinal–transverse transducers. The authors propose a mathematical model that uses a direct numerical solution of the boundary value problem based on the plain curved rod equations in Matlab. The system’s stress–strain state and nonlinear elastic characteristic are obtained using the method of successive loadings based on the curved rod’s linearized equations. For most ultrasonic instruments, the operating frequency of ultrasonic vibrations is close to 20 kHz. On the other hand, the received own oscillation frequencies are close to the working range. Using the method of successive loadings in the mathematical complex Matlab, a numerical calculation of the stress–strain state of a flat, curved rod at large displacements has been carried out. The proposed model can be considered an initial approximation to the solution of the spatial problem of the longitudinal–torsional transducer.

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“…Harkness et al investigated the use of helical slits for converting an ultrasonic vibration source to longitudinaltorsional complex vibration, demonstrating that sufficient torsional vibration was generated. [35][36][37] However, no studies have investigated simultaneous use of two frequencies for longitudinal and torsional vibration resonance. Furthermore, while this vibration source has been applied to studies of ultrasonic cutting drills, there have been no reports of its application to ultrasonic welding.…”

Section: Introductionmentioning

confidence: 99%

Welding characteristics of coated twisted wire and copper plate by ultrasonic vibration source using a transmission rod with helical slits

Oishi¹,

Miyata²,

Asami³

et al. 2020

Jpn. J. Appl. Phys.

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Conventional ultrasonic welding uses one-dimensional linear locus vibrations. However, this method is problematic in that it produces low weld strengths due to low vibration energy. We focus on generating a two-dimensional planar locus by simultaneously driving two orthogonal vibrations. This paper describes our investigation of an ultrasonic vibration source with a welding tip having helical slits capable of producing two-dimensional planar vibration. Using three types of vibration, including the planar vibration produced by this ultrasonic vibration source, we performed welding experiments under varying conditions for static pressure, welding time, and vibration amplitude, and further observed stripping of coating from a coated twisted wire. The results show the superiority of planar vibration over other types of vibration in terms of weld strength and stripping of coating.

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Ultrasonic rock sampling using longitudinal-torsional vibrations

Cited by 21 publications

References 4 publications

An ultrasonic corer for planetary rock sample retrieval

An ultrasonic corer for planetary rock sample retrieval

Designing and Calculating the Nonlinear Elastic Characteristic of Longitudinal–Transverse Transducers of an Ultrasonic Medical Instrument Based on the Method of Successive Loadings

Welding characteristics of coated twisted wire and copper plate by ultrasonic vibration source using a transmission rod with helical slits

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