Damage analysis and monitoring of composite materials and structures under cyclic loads
Author
Muc, A.
Kędziora, P.
Krawiec, Z.
Published in
Procedia Engineering
Numbering
Volume 10
Pages
1315-1320
Release date
2011
Publisher
Elsevier
Language
English
ISSN
1877-7058
DOI
10.1016/j.proeng.2011.04.219
Keywords
composite plates, fatigue damage, fatigue life, fuzzy set approach
Abstract
The fatigue damage progress is analyzed both theoretically (FE modeling) and experimentally. Since the cyclic loading causes damage, reducing the strength until the material can no longer sustain even the service loading, the theoretical analysis is associated with the definition of the damage parameter Corresponding to the stress criterion in the form proposed by Tsai and Wu. The detail analysis is mainly devoted to the consideration of two structural elements, i.e. rectangular plates with a centrally located circular hole (made of GFRP) and a square plate (made of Kevlar/epoxy resin) subjected to shear loading. The experiments demonstrate the scatter of results. The fuzzy set analysis have been proposed in order to estimate the uncertainty in the evaluation of critical number of cycles Corresponding to the final fatigue damage.
