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Proceedings Paper

Stress detection with guided acoustic ultrasonic waves by non-linear elastic and geometric effects
Author(s): K. S. Tarar; R. Meier; U. Amjad; W. Grill
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Paper Abstract

The detection of stress in bolts based on acoustic bulk waves of longitudinal and transversal polarization is well introduced and respective detection schemes are commercially available. Whereas the time-of-flight of bulk waves observed for detection varies under stress due to non-linear elastic properties, 1- or 2-dimensionally guided waves can in addition and for suitable modes even be dominantly influenced by geometric effects. Even though geometric effects are well known and used for example to tune string instruments, little if any attention has so far been given to similar effects for Lamb waves and other guided modes. The basic effects including anomalous stress dependencies if compared to bulk waves are presented and discussed including a comparison to expectations based on analytical modeling. Novel detection schemes including developments suitable for in-flight detections of stress in structural components of aircrafts are demonstrated.

Paper Details

Date Published: 8 April 2009
PDF: 8 pages
Proc. SPIE 7295, Health Monitoring of Structural and Biological Systems 2009, 729518 (8 April 2009); doi: 10.1117/12.815501
Show Author Affiliations
K. S. Tarar, Univ. Leipzig (Germany)
R. Meier, Univ. Leipzig (Germany)
U. Amjad, Univ. Leipzig (Germany)
W. Grill, Univ. Leipzig (Germany)


Published in SPIE Proceedings Vol. 7295:
Health Monitoring of Structural and Biological Systems 2009
Tribikram Kundu, Editor(s)

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