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Sensors and actuators. A, Physical v.269, 2018년, pp.294 - 307   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Numerical modeling of existing acoustic emission sensor absolute calibration approaches

Sause, Markus G.R. (University of Augsburg, Institute for Materials Resource Management, Mechanical Engineering, D-86135, Augsburg, Germany ) ; Hamstad, Marvin A. (University of Denver, Daniel Felix Ritchie School of Engineering and Computer Science, Denver, CO, 80208, USA ) ;
  • 초록  

    Abstract Within recent years, several alternative approaches to acoustic emission sensor calibration have been proposed. As some of these approaches make use of new geometries and materials, the aspect of absolute calibration in the context of these proposals is evaluated in this contribution. Validated numerical methods are applied to compare the expected acoustic emission sensor sensitivity in a variety of material and geometry configurations. The numerical approach uses a coupled structural and piezoelectric formulation in combination with electric circuit modeling. Established routines allow obtaining the sensitivity versus frequency curve as sensor response in electrical voltage per meters displacement. This study is performed for one previously used conical sensor design and one typical disc type sensor design to examine the impact of the investigated approaches for these different sensor dimensions and designs. Specific attention is paid to the influence of the propagation medium material properties, the chosen wave type and the geometry of the propagation medium. For use of plate-like propagation media further aspects, such as thickness, distance and formation of guided wave modes are evaluated. A primary result is that there is a significant influence to be expected for calibration attempts with different wave types for the same material, which can be of particular relevance when using sensor systems with extended aperture, such as common to most of the commercial sensors. Highlights Modeling of absolute AE sensor calibration is performed. Bulk, Rayleigh, Lamb, Rod wave configurations are analyzed. Conclusions are made on the influence of material, wave type, sensor type. No unique sensitivity curve is expected for one sensor type applied to different materials or calibrated with different wave types.


  • 주제어

    Acoustic emission .   Absolute calibration .   Finite element modeling .   Rayleigh waves .   Lamb waves .   Rod waves.  

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