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Damage Localization of Carbon‐Fibre‐Reinforced Plastic Plates
Author(s) -
Ungethuem Andy,
Lammering Rolf
Publication year - 2010
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201010006
Subject(s) - isotropy , materials science , acoustics , front (military) , wave propagation , structural engineering , composite material , computer science , optics , mechanical engineering , physics , engineering
Due to increasing application of light weight structures such as carbon‐fibre‐reinforced plastics well‐known procedures for the examination of components are not always applicable because of inadequate efforts or costs. Therefore, the development of a complementary system is suggested which allows for detecting damages of the structure. A new wave migration model enables to determine the damage location for non‐isotropic plates. The method is based on the propagation of waves reflected at the damage. Piezo‐electric sensors capture the strain caused by the propagating wave. The evaluation and processing of the signals of at least four sensors allow for the calculation of the damage location from the runtime of the signals. In the case of non‐isotropic material the shape of the wave front has to be known for the structure under investigation. These shapes can be obtained for example experimentally due to measurement and monitoring of the wave propagation by a laservibrometer or analytically by calculating this shapes using classical laminate and plate theory. Experiments show that the model indicates the damage location reliably. (© 2010 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)