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  1. No Access

    Article

    Experimental Study of Phased Array Beam Steering Characteristics

    The influence of several geometric parameters of linear phased arrays was studied. A systematic approach using an automated testing assembly was used to assess the steering performance of the array in a solid ...

    Arthur C. Clay, Shi-Chang Wooh, Lawrence Azar… in Journal of Nondestructive Evaluation (1999)

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    Chapter

    A Novel Ultrasonic Phased Array for the Nondestructive Evaluation of Concrete Structures

    The porous, inhomogeneous, and attenuative nature of concrete requires the use of low frequency ultrasonic nondestructive methods for the purpose of condition assessment due to the disturbed wave characteristi...

    Lawrence Azar, Shi-Chang Wooh in Review of Progress in Quantitative Nondest… (1999)

  3. No Access

    Chapter

    Phase Steering and Focusing Behavior of Ultrasound in Cementitious Materials

    Deterioration of civil infrastructure system (CIS) raises not only safety issues but also socio-economic concerns. In order to meet the high demand of structural condition assessment and health monitoring, dev...

    Shi-Chang Wooh, Lawrence Azar in Review of Progress in Quantitative Nondest… (1999)

  4. No Access

    Chapter

    A Method for the Experimental Characterization of Phased Array Beam Steering Properties

    A vital prerequisite for applying phased arrays to nondestructive evaluation (NDE) is to develop an understanding of how certain key transducer parameters influence the radiated sound field in the medium. In t...

    Shi-Chang Wooh, Arthur C. Clay… in Review of Progress in Quantitative Nondest… (1999)