Conference proceeding
Impact Force Identification in Aerospace Panels by an Inverse Ultrasonic Guided Wave Problem
HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS 2011, v 7984(1), pp 79841F-79841F-11
01 Jan 2011
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This paper deals with monitoring impacts on aluminum and composite aerospace panels. The specific problems addressed are (1) the identification of the impact forces (force magnitude time history) and (2) the discrimination of "damaging impacts" from "non-damaging impacts." Ultrasonic guided waves generated by the impacts are used as the sensing mechanism. Flexible Macro-Fiber Composite (MFC) patches are used as the ultrasonic receivers.
The impact force identification method is based on an optimization routine which minimizes the difference between the experimental impact waves and the numerical impact waves calculated by a Semi-Analytical Finite Element (SAFE) forced analysis. The differentiation of "damaging impacts" vs. "non-damaging impacts" is based on a frequency analysis of the impact waves.
These techniques are demonstrated through an extensive experimental testing program involving the following six specimens: an aluminum panel, a quasi-isotropic CFRP composite panel, a highly anisotropic CFRP composite panel, a stiffened aluminum panel, a stiffened quasi-isotropic CFRP composite panel, and a stiffened anisotropic CFRP composite panel. These panels were subjected to low-velocity hammer impacts and to high-velocity gas-gun impacts by ice projectiles at speeds up to 170 m/sec using UCSD's gas-gun test facility. In all of these experiments, the techniques summarized above gave excellent results for both impact force identification and impact force discrimination.
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1 citations in Scopus
Details
- Title
- Impact Force Identification in Aerospace Panels by an Inverse Ultrasonic Guided Wave Problem
- Creators
- Ivan Bartoli - Drexel UniversitySalvatore Salamone - University at Buffalo, State University of New YorkFrancesco Lanza di Scalea - University of California, San DiegoJennifer Rhymer - University of California, San DiegoHyonny Kim - University of California, San Diego
- Contributors
- T Kundu (Editor)
- Publication Details
- HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS 2011, v 7984(1), pp 79841F-79841F-11
- Series
- Proceedings of SPIE
- Publisher
- Spie-Int Soc Optical Engineering
- Number of pages
- 11
- Grant note
- FA9550-09-C-0158 / US Air Force Office of Scientific Research; United States Department of Defense; Air Force Office of Scientific Research (AFOSR)
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000294550700042
- Scopus ID
- 2-s2.0-79956197520
- Other Identifier
- 991019168551104721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Engineering, Multidisciplinary
- Optics