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  • Journal article
    Alleyne DN, Pavlakovic B, Lowe MJS, Cawley Pet al., 2001,

    Rapid long-range inspection of chemical plant pipework using guided waves

    , INSIGHT, Vol: 43, Pages: 93-+, ISSN: 1354-2575
  • Journal article
    Vine K, Cawley P, Kinloch AJ, 2001,

    The correlation of non-destructive measurements and toughness changes in adhesive joints during environmental attack

    , Journal of Adhesion, Vol: 77, Pages: 125-161, ISSN: 1545-5823

    Normal-incidence ultrasonic scans have been conducted on two- and three-layer adhesive-joint specimens exposed to water at 50°C for periods of up to 18 months. The joints consisted of aluminium-alloy adherends which were subjected to one of four different surface pretreatments prior to being coated (for the two-layer specimens) or bonded (for the three-layer specimens) with an epoxy polymer. The four commonly used pretreatments which were investigated were a grit-blast, a chromic-acid etch (CAE), a chromic-acid anodise (CAA) and a phosphoric-acid anodise (PAA). Techniques have been developed to measure the fracture toughness, Gc, of the specimens before and after water exposure such that fracture toughness maps could be ascertained, where the measured values of Gc may be assigned to spatially discrete positions within the specimens. The relative performance of the different pretreatments used in the present work followed that expected from the literature: the chromic-acid anodised (CAA) surface pretreatment giving the most durable two- and three-layer specimens and the grit-blasting pretreatment giving the least durable. In the two-layer specimens, the ultrasonic inspections detected two main types of defects: corrosion-driven edge-disbonds and micro-defects. The edge-disbonding mechanism usually started at an unsealed flush edge, and was initiated by a region of corrosion which developed on the edge of the specimen and which undercut the epoxy layer. Edge-disbonds were easily and accurately detected ultrasonically. Micro-defects were detected in regions remote from the edges and these small-scale, isolated defects took several forms. In the case of the three-layer joint specimens, only edge-disbonds could be detected ultrasonically. Nevertheless, in some of the three-layer joints which were attacked and weakened by ingressing water, the failure surfaces suggested that micro-defects were present. For both the two- and the three-layer specimens, the results from
  • Journal article
    Pavlakovic BN, Lowe MJS, Cawley P, 2001,

    High-frequency low-loss ultrasonic modes in imbedded bars

    , JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, Vol: 68, Pages: 67-75, ISSN: 0021-8936
    • Cite
    • Citations: 110
  • Journal article
    Wilcox PD, Lowe M, Cawley P, 2001,

    The effect of dispersion on long-range inspection using ultrasonic guided waves

    , NDT & E INTERNATIONAL, Vol: 34, Pages: 1-9, ISSN: 0963-8695
    • Cite
    • Citations: 272
  • Journal article
    Chauhan S, Lowe MJS, Davies BL, 2001,

    A multiple focused probe approach for high intensity focused ultrasound based surgery

    , ULTRASONICS, Vol: 39, Pages: 33-44, ISSN: 0041-624X
  • Conference paper
    Alleyne DN, Pavlakovic B, Lowe MJS, Cawley Pet al., 2001,

    Rapid, long range inspection of chemical plant pipework using guided waves

    , 27th annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 16 - 21 July 2000, Publisher: American Institute of Physics, Pages: 180-187
  • Journal article
    Bernard A, Lowe MJS, Deschamps M, 2001,

    Guided waves energy velocity in absorbing and non-absorbing plates

    , Journal of the Acoustical Society of America, Vol: 110, Pages: 186-196, ISSN: 0001-4966
  • Conference paper
    Bernard A, Deschamps M, Lowe M, 2001,

    Simulation of a transient bounded beam incident on an immersed isotropic plate for the reconstruction of lamb waves dispersion curves either in a complex frequency an dreal slowness or in real frequency and complex slowness

    , Pages: 73-80
  • Conference paper
    Long R, Vine K, Lowe MJS, Cawley Pet al., 2001,

    Monitoring acoustic wave propagation in buried cast iron water pipes

    , 27th conference on annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 16 - 21 July 2000, Publisher: American Institute of Physics, Pages: 1202-1209
  • Conference paper
    Wilcox PD, Lowe MJS, Cawley P, 2001,

    A signal processing technique to remove the effect of dispersion from guided wave signals

    , 27th conference on annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 17 - 21 July 2000, Publisher: American Institute of Physics, Pages: 555-562
  • Conference paper
    Marty PN, Lowe MJS, Cawley P, 2001,

    Finite element predictions of guided ultrasonic wave fields generated by piezoelectric transducers

    , 27th conference on annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 17 - 21 July 2000, Publisher: American Institute of Physics, Pages: 829-836
  • Conference paper
    Alleyne DN, Pavlakovic B, Lowe MJS, Cawley Pet al., 2001,

    Rapid, long range inspection of chemical plant pipework using guided waves

    , 27th annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 16 - 21 July 2000, Publisher: American Institute of Physics, Pages: 180-187
  • Conference paper
    Diligent O, Lowe MJS, Cawley P, 2001,

    Reflection and scattering of the S~0 Lamb mode from circular defects in plates

    , Melville, NY, Annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 16 - 20 July 2000, Publisher: American Institute of Physics, Pages: 134-141
  • Conference paper
    Demma A, Cawley P, Lowe MJS, 2001,

    Mode conversion of longitudinal and torsional guided modes due to pipe bends

    , 27th conference on annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 16 - 21 July 2000, Publisher: American Institute of Physics, Pages: 172-179
  • Conference paper
    Vogt T, Lowe MJS, Cawley P, 2001,

    Cure monitoring using ultrasonic guided waves in wires

    , 27th Annual Review of Progress in Quantitative Nondestructive Evaluation, Publisher: AMER INST PHYSICS, Pages: 1642-1649
  • Conference paper
    Neau G, Deschamps M, Lowe M, 2001,

    Group velocity of Lamb waves in anisotropic plates: comparison between theory and experiments

    , Pages: 81-88
  • Conference paper
    Evans MJ, Webster JR, Cawley P, 2001,

    A novel self calibrating simulated acoustic emission source

    , Melville, 27th annual review of progress in quantitative nondestructive evaluation, Ames, Iowa, 16 - 20 July 2000, Publisher: American Institute of Physics, Pages: 1852-1859
  • Journal article
    Wilcox PD, Lowe MJS, Cawley P, 2001,

    Mode and transducer selection for long range lamb wave inspection

    , Journal of Intelligent Material Systems and Structures, Vol: 12, Pages: 553-566, ISSN: 1045-389X
  • Journal article
    Cawley P, 2001,

    Non-destructive testing - current capabilities and future directions

    , PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS, Vol: 215, Pages: 213-223, ISSN: 1464-4207
    • Cite
    • Citations: 82
  • Conference paper
    Lowe M, Diligent O, 2001,

    Reflection of the fundamental Lamb modes from the ends of plates

    , Pages: 89-96

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