Browse by Author or Creator

Article

Guarato, Francesco and Windmill, James and Gachagan, Anthony (2013) A beam based method for target localization : inspiration from bats' directivity and binaural reception for ultrasonic sonar. Journal of the Acoustical Society of America, 133 (6). pp. 4077-4086. ISSN 0001-4966

Guarato, Francesco and Windmill, James and Gachagan, Anthony and Harvey, Gerald (2013) An investigation of acoustic beam patterns for the sonar localization problem using a beam based method. Journal of the Acoustical Society of America, 133 (6). pp. 4044-4053. ISSN 0001-4966

Bolu, Gabriel Nnamdi and Pierce, Gareth and Gachagan, Anthony and Barden, Tim and Harvey, Gerry (2012) Investigations into the vibrational response of an aero-engine turbine blade under thermosonic excitation. Key Engineering Materials, 518. pp. 184-192. ISSN 1013-9826

Barlow, Euan and Mulholland, Anthony J. and Gachagan, Anthony and Nordon, Alison (2011) A theoretical investigation of chirp insonification of ultrasound contrast agents. Ultrasonics, 51 (6). pp. 725-733. ISSN 0041-624X

Harvey, Gerald and Gachagan, Anthony (2011) Simulation and measurement of nonlinear behaviour in a high-power test cell. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 58 (4). pp. 808-819. ISSN 0885-3010

Bolu, Gabriel and Gachagan, Anthony and Pierce, Stephen and Harvey, Gerald (2010) Reliable thermosonic inspection of aero engine turbine blades. Insight: The Journal of the British Institute of Non-Destructive Testing, 52 (9). pp. 488-493. ISSN 1354-2575

Lucas, M. and Gachagan, A. and Cardoni, A. (2009) Research applications and opportunities in power ultrasonics. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 223 (12). pp. 2949-2965. ISSN 0954-4062

Carson, G. and Mulholland, A.J. and Nordon, A. and Gachagan, A. and Hayward, G. (2009) Theoretical analysis of ultrasonic vibration spectra from multiple particle-plate impacts. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 56 (5). pp. 1034-1041. ISSN 0885-3010

Barlow, Euan and Mulholland, A.J. and Gachagan, A. and Nordon, A. and MacPherson, Kenneth G. (2009) Analysis of the Rayleigh-Plesset equation with chirp excitation. IMA Journal of Applied Mathematics, 74 (1). pp. 20-34. ISSN 0272-4960

Carson, G. and Mulholland, A.J. and Nordon, A. and Tramontana, M. and Gachagan, A. and Hayward, G. (2009) Estimating particle concentration using passive ultrasonic measurement of impact vibrations. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 56 (2). pp. 345-352. ISSN 0885-3010

Harvey, G. and Gachagan, A. and Mackersie, J.W. and McCunnie, Thomas F. and Banks, R.A. (2009) Flexible ultrasonic transducers incorporating piezoelectric fibres. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 56 (9). pp. 1999-2009. ISSN 0885-3010

Barlow, E. and Mulholland, A. and Gachagan, A. and Nordon, A. (2009) Theoretical analysis of chirp excitation of contrast agents. Physics Procedia, 3 (1). pp. 743-747. ISSN 1875-3892

Carson, G. and Mulholland, A.J. and Nordon, A. and Tramontana, M. and Gachagan, A. and Hayward, G. (2008) Particle sizing using passive ultrasonic measurement of particle-wall impact vibrations. Journal of Sound and Vibration, 317 (1-2). pp. 142-157. ISSN 0022-460X

Mckenna, James P. and Gachagan, A. and McArthur, S.D.J. and McLean, Neil I. (2008) Integrating flaw-response modelling tools used for inspection qualification into a Multi-Agent System software platform. Insight: The Journal of the British Institute of Non-Destructive Testing, 50 (2). pp. 70-73. ISSN 1354-2575

McKenna, J. and Gachagan, A. and McArthur, S.D.J. and McLean, N. (2007) The design of a multi-agent system for flaw-response modelling. Insight: The Journal of the British Institute of Non-Destructive Testing, 49 (2). pp. 74-78. ISSN 1354-2575

Robertson, D.C. and Hayward, G. and Gachagan, A. and Murray, V. (2006) Comparison of the performance of pmn-pt single-crystal and ceramic composite arrays for NDE applications. Insight: The Journal of the British Institute of Non-Destructive Testing, 48 (2). pp. 97-99. ISSN 1354-2575

Robertson, D.C. and Hayward, G. and Gachagan, A. (2006) Comparison of the frequency and physical nature of the lowest order parasitic mode in single crystal and ceramic 2-2 and 1-3 piezoelectric composite transducers. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 53 (8). pp. 1503-1512. ISSN 0885-3010

Nordon, A. and Carella, Y. and Gachagan, A. and Littlejohn, D. and Hayward, G. (2006) Factors affecting broadband acoustic emission measurements of a hetrogeneous reaction. Analyst, 131 (2). pp. 323-330. ISSN 0003-2654

Harvey, G. and Gachagan, A. (2006) Noninvasive field measurement of low-frequency ultrasonic transducers operating in sealed vessels. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 53 (10). pp. 1749-1758. ISSN 0885-3010

Nordon, A. and Waddell, R. and Bellamy, L.J. and Gachagan, A. and Littlejohn, D. and Hayward, G. (2005) Monitoring of a heterogeneous reaction by acoustic emission. Analyst, 129 (5). pp. 463-467. ISSN 0003-2654

Gachagan, A. and Hayward, G. and Banks, R.A. (2005) A flexible piezoelectric transducer design for efficient generation and reception of ultrasonic lamb waves. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 52 (7). pp. 1175-1182. ISSN 0885-3010

Gachagan, A. and McNab, A. and Blindt, R. and Patrick, M. and Marriott, C. (2004) A high power ultrasonic array based test cell. Ultrasonics, 42 (1-9). pp. 57-68. ISSN 0041-624X

Robertson, D.C. and Hayward, G. and Gachagan, A. and Reynolds, P. (2004) Minimisation of mechanical cross talk in periodic piezoelectric composite arrays. Insight: The Journal of the British Institute of Non-Destructive Testing, 46 (11). pp. 658-661. ISSN 1354-2575

Entwhistle, N.J. and Hamilton, A. and Kelly, R.G. and Nisbett, J.B. and Hayward, G. and Gachagan, A. (2004) Teaching and learning analogue electronics in undergraduate courses: preliminary findings from the ETL project. International Journal of Electrical Engineering Education, 42 (1). pp. 21-34. ISSN 0020-7209

Gachagan, A. and Speirs, David and McNab, A. (2003) The design of a high power ultrasonic test cell using finite element modelling techniques. Ultrasonics, 41 (4). pp. 283-288.

Hayward, G. and Hailu, B. and Farlow, R. and Gachagan, A. and McNab, A. (2001) The design of embedded transducers for structural health monitoring applications. Proceedings of SPIE: The International Society for Optical Engineering, 4327 (312). pp. 312-323. ISSN 1996-756X

Book Section

Dziewierz, Jerzy and Ramadas, Sivaram Nishal and Gachagan, Anthony and O'Leary, Richard (2010) Hexagonal array structure for 2D NDE applications. In: Review of progress in quantitative nondestructive evaluation. AIP Conference Proceedings, 29 . American Institute of Physics, Melville, pp. 825-830. ISBN 9780735407480

Bolu, G. and Gachagan, A. and Pierce, G. and Harvey, G. and Choong, L. (2010) Monitoring crack propagation in turbine blades caused by thermosonic inspection. In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. American Institute of Physics, p. 1654. ISBN 978-0-7354-0748-0

Mckenna, James P. and McLean, Neil I. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2008) An advanced flaw-response modelling approach for inspection qualification using a multi-agent system software platform. In: Review of Progress in Quantitative Nondestructive Evaluation: 34th Annual Review of Progress in Quantitative Nondestructive Evaluation. AIP Conference Proceedings. American Institute of Physics, pp. 1598-1605. ISBN 978-0-7354-0494-6

McLean, Neil I. and Mckenna, James P. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2008) A prototype demonstrator for an inspection qualification multi-agent system (IQMAS). In: Review of Progress in Quantitative Nondestructive Evaluation: 34th Annual Review of Progress in Quantitative Nondestructive Evaluation. AIP Conference Proceedings. American Institute of Physics, pp. 1606-1613. ISBN 978-0-7354-0494-6

Harvey, G. and Gachagan, A. and McNab, A. (2005) The application of finite element analysis in the design of high intensity ultrasonic systems. In: Proceedings of the 2005 IEEE Ultrasonics Symposium. IEEE Conference Proceedings, 430 - 433. ISBN 0-7803-9382-1

Conference or Workshop Item

Bolu, Gabriel Nnamdi and Gachagan, Anthony and Pierce, Stephen and Barden, Tim (2012) The application of finite element analysis to investigate the vibrational response of a turbine blade under thermosonic excitation. In: QNDE 2012, 2012-07-15 - 2012-07-20, Denver. (Unpublished)

Bolu, G. and Gachagan, A. and Pierce, S.G. and Harvey, G. (2010) Reliable crack detection in turbine blades using thermosonics: an empirical study. In: UNSPECIFIED.

Dziewierz, J. and Ramadas, S.N. and Gachagan, A. and O'Leary, R.L. and Hayward, G. (2010) A 2D ultrasonic array design incorporating hexagonal-shaped elements for NDE applications. In: Proceedings of 2009 IEEE Ultrasonics Symposium, 1900-01-01.

Ramadas, S.N. and Dziewierz, J. and O'Leary, R.L. and Gachagan, A. and Velichko, A. and Wilcox, P.D. (2010) An annular array with fiber composite microstructure for far field NDT imaging applications. In: Proceedings of 2009 IEEE Ultrasonics Symposium, 1900-01-01.

Mackersie, J.W. and Harvey, G. and Gachagan, A. (2009) Development of an efficient conformable array structure. In: 35th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2008-07-20 - 2008-07-25, Chicago.

Barlow, E. and Mullholland, Anthony J. and Nordon, A. and Gachagan, A. (2009) Theoretical analysis of chirp excitation of contrast agents. In: International Congress on Ultrasonics, 2009-01-11 - 2009-01-17, Santiago, Chile. (Unpublished)

Tramontana, M. and Gachagan, A. and Hayward, G. and Nordon, A. and Littlejohn, D. (2007) 4I-3 ultrasonic monitoring of heterogeneous chemical reactions. In: UNSPECIFIED.

Harvey, G. and Gachagan, A. and Mackersie, J.W. (2007) Enhanced flexibility and performance from piezocomposite 2D array with a dual-polymer phase improved structure. In: IEEE Ultrasonics Symposium 2006, 2006-10-02 - 2006-10-06, Vancouver.

Harvey, G. and Gachagan, A. and Mackersie, J.W. and Banks, R. (2007) Exploring the advantages of a random 1-3 connectivity piezocomposites structure incorporating piezoelectric fibres as the active element. In: IEEE Ultrasonics Symposium 2006, 2006-10-02 - 2006-10-06, Vancouver.

Mckenna, J.P. and McLean, N.I. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2007) Integrating flaw-response modelling tools for inspection qualification into a multi-agent system. In: 46th Annual British Conference on Non-Destructive Testing, 2007-09-18 - 2007-09-20, Glasgow.

Gachagan, A. and Harvey, G. and O'Leary, R.L. and Mackersie, J.W. (2007) Investigating the influence of the constituent materials on the performance of periodic piezoelectric composite arrays. In: UNSPECIFIED.

Harvey, G. and Gachagan, A. and O'Leary, R.L. (2007) Simulation of the influence of hydrophones used for the characterization of pressure field distribution in low frequency, high power ultrasonic reactor vessels. In: IEEE International Ultrasonics Symposium, 1999-01-01.

O'Leary, R.L. and Tweedie, A. and Harvey, G. and Gachagan, A. and Holmes, C. and Wilcox, P. and Drinkwater, B. (2007) Total focussing method for volumetric imaging in immersion non destructive evaluation. In: 2007 IEEE International Ultrasonics Symposium, 2007-10-28 - 2007-10-31, New York.

McLean, N.I. and Mckenna, J.P. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2007) A prototype inspection qualification multi-agent system (IQMAS). In: 46th Annual British Conference on Non-Destructive Testing, 2007-09-18 - 2007-09-20, Glasgow.

Benny, C.G. and Gachagan, A. and Hayward, G. and Nordon, A. and Littlejohn, D. (2007) A wideband ultrasonic test system for characterisation of particulate systems in the linear and non-linear regimes. In: International Congress on Ultrasonics, 2007-04-09 - 2007-04-13, Vienna.

Mckenna, J.P. and McLean, N.I. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2006) The design of a multi-agent system for flaw-response modelling. In: 45th Annual British Conference on Non-Destructive Testing, 2006-09-12 - 2006-09-14, Stratford-upon-Avon.

McLean, N.I. and Mckenna, J.P. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2006) A multi agent system for inspection qualification. In: 45th Annual British Conference on Non-Destructive Testing, 2006-09-12 - 2006-09-14, Stratford-upon-Avon.

Gachagan, A. and Reynolds, P. and McNab, A. (2004) An analysis of ultrasonic wave propagation in metallic pipe structures using finite element modelling techniques. In: 16th WCNDT 2004 - World Conference on NDT, 2004-08-30 - 2004-09-03, Montreal.

Robertson, D. and Hayward, G. and Gachagan, A. and Hyslop, J. and Murray, V. (2004) A new low frequency piezoelectric composite transducer. In: 2004 IEEE Ultrasonics Symposium, 2004-08-23 - 2004-08-27, Montreal.

Robertson, D.C. and Hayward, G. and Gachagan, A. and Hyslop, J. and Reynolds, P. (2003) Comparison of mechanical cross talk in single crystal and ceramic periodic piezoelectric composite arrays. In: IEEE International Ultrasonics Symposium 2003, 2003-10-05 - 2003-10-08, Honolulu.

Hayward, G. and Benny, C.G. and Gachagan, A. and Farlow, R. and Hailu, B. and McNab, A. and Girma, Demessie (2003) Embedded ultrasonic transducer design and wireless communication for intelligent monitoring of structures. In: 29th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2002-07-14 - 2002-07-19, Bellingham.

Gachagan, A. and Hailu, B. and McNab, A. and Lang, W. and Hendry, J. and Hayward, G. and Banks, W. (2003) Impact on the mechanical integrity of carbon fibre reinforced composite plates incorporating embedded piezoceramic transducers. In: 30th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2003-07-27 - 2003-08-01, Green Bay.

Robertson, D.C. and Hayward, G. and Gachagan, A. (2002) Lamb wave suppression in periodic 1-3 piezoelectric composite transducers. In: IEEE International Ultrasonic Symposium, 2002-10-08 - 2002-10-11, Munich.

Gachagan, A. and Kelly, S. and Altman, M. and Grauvogl, E. and Hayward, G. and Banks, Robert and Mccunnie, Thomas and Skillen, David (2002) Development of a manual air-coupled ultrasonic inspection instrument for use on aeronautical structures under in-service conditions. In: 29th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2002-07-14 - 2002-07-19, Bellingham.

Hailu, B. and Hayward, G. and McNab, A. and Gachagan, A. and Farlow, R. (2001) The structural integrity of composite plates with embedded piezoelectric transducers for smart structural monitoring. In: NDT2001, 2001-09-01.

Hailu, B. and Hayward, G. and McNab, A. and Gachagan, A. and Farlow, R. (2001) An evaluation of different piezoelectric materials for smart structural monitoring applications : the issue of structural integrity in the host structure and mechanical compatibility of embedded transducers. In: 28th Annual Conference on Quantitative Nondestructive Evaluation, 2001-07-29 - 2001-08-03, Brunswick.

Hayward, G. and McNab, A. and Gachagan, A. and Farlow, R. and Hailu, B. and Atkinson, D.C. and Girma, D. and Smith, D.G. and Whitely, S. (2000) Embedded ultrasonic sensors for monitoring structural integrity. In: 27th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2000-07-16 - 2000-07-20, Ames.

Proceedings Paper

Ramadas, Sivaram Nishal and Jackson, Joseph and Tweedie, Andrew and O'Leary, Richard and Gachagan, Anthony (2011) Conformally mapped 2D ultrasonic array structure for NDT imaging application. [Proceedings Paper]

Mutasa, T. and Gachagan, A. and Nordon, A. and O'Leary, R.L. (2011) Ultrasonic wave propagation in cylindrical vessels and implications for ultrasonic reactor design. [Proceedings Paper]

Ramadas, S.N. and O'Leary, R.L. and Gachagan, A. and Hayward, G. and Banks, R.A. (2010) A wideband annular piezoelectric composite transducer configuration with a graded active layer profile. [Proceedings Paper]