Assessment of Damages in Sandwich Panels Based on the Damage Location Indexes
Journal Title: Romanian Journal of Acoustics and Vibration - Year 2013, Vol 10, Issue 1
Abstract
This paper presents a methodology to locate and evaluate transversal damages in composite structures, based on natural frequency shifts due to damage. In previous researches the authors succeeded to contrive a relation between the decrease of the strain energy stored in a damaged slice and the frequency change due to that damage. It can be used to create patterns, uniquely characterizing the damage position along the beam, so that damage localization becomes a pattern recognition problem. While for beams with constant rigidity in healthy state these patterns are not dependent on the beam’s cross-section shape or structure, the damage location algorithm can be used also for composites, like sandwich panels. Once the location known, the damage severity/depth can be extracted from the above mentioned relation. This damage assessment algorithm was validated by measurements on numerous sandwich panel specimens.
Authors and Affiliations
Zeno PRAISACH, Gilbert GILLICH, Ovidiu VASILE, Daniela BÎRDEANU, Carla PROTOCSIL
Keywords
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- EP ID EP146687
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