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
Related Articles
- EP ID EP146687
- DOI -
- Views 84
- Downloads 0
Analysis of Dynamic Response of the Human Body as a System With Several Degrees of Freedom From External Harmonic Perturbations
The modal analysis enables the evaluation of a certain structure`s behaviour based on the identification of the resonances or of the feed-back modes. It can be a method through which the modal parameters of the human str...
DAMAGE DETECTION – ACHIEVEMENTS AND NEW CHALLENGES
In last decades the interest in the capability to monitor structures and detect damage in the incipient stage is omnipresent in civil, mechanical and aerospace engineering. Actual damage detection methods are mainly loca...
Researches Regarding the Effect of Nitinol Vibration Damper Applied to Infrastructures
Many of the performed researches all around the world aim to develop advanced technologies in order to enhance the performances of the infrastructure systems, different from the actual ones, fact which involves multidisc...
Influence of Composite Neoprene upon the Energy Internal Dissipation in case of Harmonic Process
This paper presents the approach performed on viscoelastic systems with such geometrical configuration determining the behaviour as composite neoprene, tested under dynamic regime in two distinct cases, as follows: - sy...
Evaluation of the Dissipated Energy in Viscoelastic or Hysteretic Seismic Isolators
This paper represents the result of experimental and theoretical researches concerning the behaviour and the performance level specific to neoprene bearings subjected to conformity assessment. The tandardized test involv...