The use of the wavelet transform has been gaining widespread acceptance over the last decade as a valuable tool for damage detection. This paper investigates the use of wavelets for detecting mixed-mode, also known as combined mode, cracks in truss structures. The propagation of an open, mixed-mode crack is simulated by using a macroscopic model of damage that is combined with a finite element model of the Warren truss. The natural modes of the truss with varying levels of damage are then used to determine crack location on a specific member of the truss. A damage detection algorithm is developed and the influence of multiple parameters such as truss geometry, crack geometry, number of truss members, etc. is investigated. A direct correlation between damage severity and the magnitude of wavelet coefficients is found for a predefined damage location. It is observed that the proposed damage detection algorithm can be used to successfully detect mixed-mode cracks even in the presence of noise, and even when a relatively coarse sampling of natural modes is used. Multiple simulations are presented and some shortcomings of the proposed algorithm are also discussed in detail.
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ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 17–20, 2014
Buffalo, New York, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-4641-4
PROCEEDINGS PAPER
Use of Wavelets for Mixed-Mode Damage Diagnostics in Warren Truss Structures
Hussain Altammar,
Hussain Altammar
University of Wisconsin - Milwaukee, Milwaukee, WI
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Anoop Dhingra,
Anoop Dhingra
University of Wisconsin - Milwaukee, Milwaukee, WI
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Sudhir Kaul
Sudhir Kaul
Western Carolina University, Cullowhee, NC
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Hussain Altammar
University of Wisconsin - Milwaukee, Milwaukee, WI
Anoop Dhingra
University of Wisconsin - Milwaukee, Milwaukee, WI
Sudhir Kaul
Western Carolina University, Cullowhee, NC
Paper No:
DETC2014-34017, V008T11A001; 10 pages
Published Online:
January 13, 2015
Citation
Altammar, H, Dhingra, A, & Kaul, S. "Use of Wavelets for Mixed-Mode Damage Diagnostics in Warren Truss Structures." Proceedings of the ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 8: 26th Conference on Mechanical Vibration and Noise. Buffalo, New York, USA. August 17–20, 2014. V008T11A001. ASME. https://doi.org/10.1115/DETC2014-34017
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