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- Title
MODAL TRIGGERED NONLINEARITIES FOR DAMAGE LOCALIZATION IN THIN WALLED FRC STRUCTURES - A NUMERICAL STUDY.
- Authors
Rademacher, Tobias; Zehn, Manfred
- Abstract
This paper presents a novel method for detecting locations of damages in thin walled structural components made of fiber reinforced composites (FRC). Therefore, the change of harmonic distortion, which is found by current research to be very sensitive to delamination, under resonant excitation will be derived from FEMsimulation. Based on the linear modal description of the undamaged structure and the damage-induced nonlinearities represented by a nonlinear measure, two spatial damage indexes have been formulated. The main advantage of this novel approach is that the information about the defect is represented mainly by changes in the modal harmonic distortion (MHD), which just needs to be measured in one (or few) structural points. The spatial resolution is given by the pairwise coupling of the MHD with the corresponding mode shapes.
- Subjects
STRUCTURAL health monitoring; NONLINEAR acoustics; HARMONIC distortion (Physics)
- Publication
Facta Universitatis, Series: Mechanical Engineering, 2016, Vol 14, Issue 1, p21
- ISSN
0354-2025
- Publication type
Article
- DOI
10.22190/fume1601021r