An improved DPSM technique for modelling ultrasonic fields in cracked solids

Sourav Banerjee; Tribikram Kundu; Dominique Placko

doi:10.1117/12.717230

24 April 2007 An improved DPSM technique for modelling ultrasonic fields in cracked solids

Sourav Banerjee, Tribikram Kundu, Dominique Placko

Proceedings Volume 6532, Health Monitoring of Structural and Biological Systems 2007; 65320R (2007) https://doi.org/10.1117/12.717230
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

In recent years Distributed Point Source Method (DPSM) is being used for modelling various ultrasonic, electrostatic and electromagnetic field modelling problems. In conventional DPSM several point sources are placed near the transducer face, interface and anomaly boundaries. The ultrasonic or the electromagnetic field at any point is computed by superimposing the contributions of different layers of point sources strategically placed. The conventional DPSM modelling technique is modified in this paper so that the contributions of the point sources in the shadow region can be removed from the calculations. For this purpose the conventional point sources that radiate in all directions are replaced by Controlled Space Radiation (CSR) sources. CSR sources can take care of the shadow region problem to some extent. Complete removal of the shadow region problem can be achieved by introducing artificial interfaces. Numerically synthesized fields obtained by the conventional DPSM technique that does not give any special consideration to the point sources in the shadow region and the proposed modified technique that nullifies the contributions of the point sources in the shadow region are compared. One application of this research can be found in the improved modelling of the real time ultrasonic non-destructive evaluation experiments.

Citation Download Citation

Sourav Banerjee, Tribikram Kundu, and Dominique Placko "An improved DPSM technique for modelling ultrasonic fields in cracked solids", Proc. SPIE 6532, Health Monitoring of Structural and Biological Systems 2007, 65320R (24 April 2007); https://doi.org/10.1117/12.717230

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KEYWORDS

Ultrasonics

Solids

Chromium

Interfaces

Modeling

Transducers

Matrices

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