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- Title
IDENTIFICATION OF THE DAMAGE ZONE IN A COMPOSITE PLATE BY USING FREQUENCY CHANGES.
- Authors
Ručevskis, Sandris
- Abstract
Due to some advantages, e.g., stiffness and strength, compared with homogeneous materials, composite materials are being increasing used in a variety of engineering application, such as aircraft, automobiles, sporting goods, and electronics. On the other hand, the mechanical properties of composites can degrade severely in the presence of some damage. In the present study, a numerical-experimental method for the damage identification is described. For this purpose, a model-based identification technique based on the method of experiment design and the response-surface approach is suggested for solving the damage identification (inverse) problem. The response-surface approximations are used for constructing the inverse relations (identification functional) between the experimentally measured and numerically calculated parameters of the response of structure (modal frequencies). By minimizing the identification functional, the damage parameters are obtained. The identification procedure is realized by substituting the natural experiment with a numerical one. It is shown that about the values of location and size of the damaged zone obtained are similar to those determined in the numerical experiment. The effect of the damage extent and the size of damaged area on the accuracy of identification is also investigated.
- Subjects
STRUCTURAL engineering; COMPOSITE materials; RELIABILITY (Personality trait); SPORTING goods; CONSTRUCTION materials; ENGINEERING
- Publication
Telecommunications & Electronics, 2008, Vol 24, Issue 9, p95
- ISSN
1407-8880
- Publication type
Article