18 April 2012 Guided-wave-based structural health monitoring of built-up composite structures using spectral finite element method
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Abstract
The paper discusses basically a wave propagation based method for identifying the damage due to skin-stiffener debonding in a stiffened structure. First, a spectral finite element model (SFEM) is developed for modeling wave propagation in general built-up structures, using the concept of assembling 2D spectral plate elements and the model is then used in modeling wave propagation in a skin-stiffener type structure. The damage force indicator (DFI) technique, which is derived from the dynamic stiffness matrix of the healthy stiffened structure (obtained from the SFEM model) along with the nodal displacements of the debonded stiffened structure (obtained from 2D finite element model), is used to identify the damage due to the presence of debond in a stiffened structure.
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Ajith Vezhapparambu, Ajith Vezhapparambu, Gopalakrishnan Srinivasan, Gopalakrishnan Srinivasan, "Guided-wave-based structural health monitoring of built-up composite structures using spectral finite element method", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83480O (18 April 2012); doi: 10.1117/12.914775; https://doi.org/10.1117/12.914775
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