Imperial College London
Portrait Picture

ProfessorMichaelLowe

Faculty of Engineering, Department of Mechanical Engineering

Head of Department of Mechanical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7000m.lowe Website

 
 
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Assistant

 

Ms Nina Hancock +44 (0)20 7594 7068

 
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Location

 

577DCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

321 results found

Challis RE, Phang APY, Lowe MJS, Mather MLet al., 2008, A system for magnetostrictive transduction of guided waves in fluid-filled pipes of small diameter, IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, Vol: 55, Pages: 1992-2004, ISSN: 0885-3010

Journal article

Demma A, Cawley P, Lowe M, Roosenbrand AGet al., 2008, The reflection of the fundamental torsional mode from cracks and notches in pipes, CISM International Centre for Mechanical Sciences, Courses and Lectures, Pages: 195-209

A quantitative study of the reflection of the T(0,1) mode from defects in pipes in the frequency range 10-300 kHz has been carried out, finite element predictions being validated by experiments on selected cases. Both cracklike defects with zero axial extent and notches with varying axial extents have been considered. The results show that the reflection coefficient from axisymmetric cracks increases monotonically with depth at all frequencies and increases with frequency at any given depth. In the frequency range of interest there is no mode conversion at axisymmetric defects. With nonaxisymmetric cracks, the reflection coefficient is a roughly linear function of the circumferential extent of the defect at relatively high frequencies, the reflection coefficient at low circumferential extents falling below the linear prediction at lower frequencies. With nonaxisymmetric defects, mode conversion to the F(1,2) mode is generally seen, and at lower frequencies the F(1,3) mode is also produced. The depth and circumferential extent are the parameters controlling the reflection from cracks; when notches having finite axial extent, rather than cracks, are considered, interference between the reflections from the start and the end of the notch causes a periodic variation of the reflection coefficient as a function of the axial extent of the notch. The results have been explained in terms of the wave-number-defect size product, ka. Low frequency scattering behavior is seen when ka<0.1, high frequency scattering characteristics being seen when ka> 1.

Book chapter

Cicero T, Cawley P, Lowe M, Simonetti F, Rokhlin SIet al., 2008, Deconvolution approach for sparse sensor arrays in Structural Health Monitoring, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 571-+, ISSN: 0094-243X

Conference paper

Phang APY, Challis RE, Lowe MJS, Mather MLet al., 2008, Magnetostrictive transduction of guided waves in fluid-filled pipes, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 849-+, ISSN: 0094-243X

Conference paper

Castaings M, Lowe MJS, 2008, Finite Element Model for waves guided along solid systems of arbitrary section coupled to infinite solid media, Journal of the Acoustical Society of America, Vol: 123, Pages: 696-708

Journal article

Connolly GD, Lowe MJS, Rokhlin SI, Temple JAGet al., 2008, Modeling the propagation of elastic waves in generally anisotropic materials and austenitic steel welds, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 1026-+, ISSN: 0094-243X

Conference paper

Ryden N, Lowe MJS, Cawley P, 2008, Non-contact surface wave scanning of pavements using a rolling microphone array, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 1328-+, ISSN: 0094-243X

Conference paper

Rajagopal P, Lowe MJS, 2008, Scattering of the fundamental shear horizontal mode by part-thickness surface-breaking cracks in an isotropic plate, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 664-671, ISSN: 0094-243X

Conference paper

Connolly GD, Lowe MJS, Rokhlin SI, Temple JAGet al., 2008, Use of Fermat's principle to aid the interpretation of the ultrasonic inspection of anisotropic welds, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 1018-+, ISSN: 0094-243X

Conference paper

Fan Z, Lowe MJS, Castaings M, Bacon Cet al., 2008, Prediction of the propagation and leakage of torsional waves in a waveguide of arbitrary cross-section immersed in a fluid, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 1567-+, ISSN: 0094-243X

Conference paper

Russell J, Cawley P, Drozdz M, Lowe M, Habgood Net al., 2008, Finite element modeling of elastic wave propagation and defect interaction in large, complex components, 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 99-106, ISSN: 0094-243X

Conference paper

Rajagopal P, Lowe MJS, 2007, Short range scattering of the fundamental shear horizontal guided wave mode normally incident at a through-thickness crack in an isotropic plate, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, Vol: 122, Pages: 1527-1538, ISSN: 0001-4966

Journal article

Ma J, Lowe MJS, Simonetti F, 2007, Feasibility study of sludge and blockage detection inside pipes using guided torsional waves, MEASUREMENT SCIENCE AND TECHNOLOGY, Vol: 18, Pages: 2629-2641, ISSN: 0957-0233

Journal article

Ma J, Lowe MJS, Simonetti F, 2007, Measurement of the properties of fluids inside pipes using guided longitudinal waves, IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, Vol: 54, Pages: 647-658, ISSN: 0885-3010

Journal article

Juluri N, Lowe M, Cawley P, 2007, The guiding of ultrasound by a welded jomit in a plate, 33rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 1079-+, ISSN: 0094-243X

Conference paper

Ma J, Lowe MJS, Simonetti F, 2007, Measurement of the properties of fluids inside pipes using guided longitudinal waves, 33rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 1624-+, ISSN: 0094-243X

Conference paper

Ma J, Simonetti F, Lowe MJS, 2007, Practical considerations of sludge and blockage detection inside pipes using guided ultrasonic waves, 33rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 136-143, ISSN: 0094-243X

Conference paper

Rajagopal P, Lowe MJS, 2007, Scattering of the fundamental shear horizontal guided wave mode incident at an arbitrary angle on finite slits in an isotropic plate, 33rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 47-+, ISSN: 0094-243X

Conference paper

Drozdz M, Skelton E, Craster RV, Lowe MJSet al., 2007, Modeling bulk and guided waves in unbounded elastic media using absorbing layers in commercial finite element packages, 33rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 87-94, ISSN: 0094-243X

Conference paper

Ma J, Simonetti F, Lowe MJS, 2006, Scattering of the fundamental torsional mode by an axisymmetric layer inside a pipe, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, Vol: 120, Pages: 1871-1880, ISSN: 0001-4966

Journal article

Fromme P, Wilcox PD, Lowe MJS, Canvley Pet al., 2006, On the development and testing of a guided ultrasonic wave array for structural integrity monitoring, IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, Vol: 53, Pages: 777-785, ISSN: 0885-3010

Journal article

Davies J, Simonetti F, Lowe M, Cawley Pet al., 2006, Review of synthetically focused guided wave imaging techniques with application to defect sizing, Brunswick, Maine (USA), AIP Conference Proceedings, Publisher: AIP, Pages: 142-149, ISSN: 0094-243X

Conference paper

Fleming M, Lowe MJS, Simonetti F, Cawley Pet al., 2006, Super resolution imaging: performance studies, Brunswick, Maine (USA), AIP Conference Proceedings, Publisher: AIP, Pages: 736-743, ISSN: 0094-243X

Conference paper

Ma J, Simonetti F, Lowe MJS, 2006, Sludge and blockage characterization inside pipes using guided ultrasonic waves, Brunswick, Maine (USA), AIP Conference Proceedings, Publisher: AIP, Pages: 1656-1663, ISSN: 0094-243X

Conference paper

Cegla FB, Cawley P, Lowe MJS, 2006, Fluid bulk velocity and attenuation measurements in non-Newtonian liquids using a dipstick sensor, MEASUREMENT SCIENCE AND TECHNOLOGY, Vol: 17, Pages: 264-274, ISSN: 0957-0233

Journal article

Ryden N, Lowe MJS, Cawley P, Park CBet al., 2006, Non-contact surface wave measurements using a microphone, Pages: 1110-1115

Pavements are typically constructed using several layers of materials, and their durability depends on the quality of these strata. It is therefore very valuable to be able to determine the properties of the layers non-destructively. Accelerometers can be used as receivers in surface wave testing of pavements, but require good seismic coupling to the surface. We present experiments using a non-directional audio microphone as a non-contact receiver. Leaky air-coupled surface waves are measured and processed using the Multichannel Analysis of Surface Waves (MASW) technique. Results show that leaky surface waves can be accurately measured using an ordinary audio microphone. This opens up the possibility for fast on-the-fly surface wave testing of pavements. We present the method along with a case study where the thickness and the stiffness of a concrete slab are evaluated from a data set acquired using a microphone as a non-contact receiver.

Conference paper

Kondo S, Sayles RS, Lowe MJS, 2006, A combined optical-ultrasonic method of establishing the compressibility of high-pressure oil and grease films entrapped in a ball on flat contact, JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, Vol: 128, Pages: 155-167, ISSN: 0742-4787

Journal article

Ryden N, Lowe MJS, Cawley P, Park CBet al., 2006, Evaluation of multilayered pavement structures from measurements of surface waves, Publisher: American Institute of Physics, Pages: 1616-1623, ISSN: 0094-243X

Conference paper

Drozdz M, Moreau L, Castaings M, Lowe MJS, Cawley Pet al., 2006, Efficient numerical modelling of absorbing regions for boundaries of guided waves problems, Publisher: American Institute of Physics, Pages: 126-133, ISSN: 0094-243X

Conference paper

Cegla FB, Cawley P, Lowe MJS, 2006, Measurement of bulk velocity and attenuation in fluids and particle suspensions using the quasi-Scholte mode, Publisher: American Institute of Physics, Pages: 1245-1252, ISSN: 0094-243X

Conference paper

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