Derivation of fatigue damage accumulation curves based on changes in composite material properties

Pavlou, D and Kourousis, K 2013, 'Derivation of fatigue damage accumulation curves based on changes in composite material properties', in C. H. Wang (ed.) Proceedings of the 8th International Conference on Structural Integrity and Failure, Melbourne, Australia, 11-12 July 2013, pp. 78-84.


Document type: Conference Paper
Collection: Conference Papers

Title Derivation of fatigue damage accumulation curves based on changes in composite material properties
Author(s) Pavlou, D
Kourousis, K
Year 2013
Conference name SIF2013
Conference location Melbourne, Australia
Conference dates 11-12 July 2013
Proceedings title Proceedings of the 8th International Conference on Structural Integrity and Failure
Editor(s) C. H. Wang
Publisher Australian Fracture Group, RMIT University
Place of publication Melbourne, Australia
Start page 78
End page 84
Total pages 7
Abstract The life of composite materials (CM) subjected to fatigue conditions is associated with the gradual damage of their structure. Since the damage accumulation is reflected by changes in CM properties, the derivation of damage accumulation curves may be based on test results providing the reduction of the residual strength. Examined in this work is a non-linear fatigue damage accumulation function for cross-ply CF/PEEK laminates. This damage function is specified with respect to damage parameters derived by the strength decrease during fatigue for the CF/PEEK. Taking into account this concept, an improvement of the theory of isodamage lines is proposed. Since the nonlinearity of the derived damage function depends on an exponent that is a function of the fatigue stress amplitude, the effect of the loading order and the previous damage history on the total fatigue life is investigated. Numerical examples of fatigue life prediction under two-stage loading conditions and a damage accumulation map for the CP/PEEK are presented and discussed.
Subjects Solid Mechanics
Composite and Hybrid Materials
Keyword(s) Composites
damage
fatigue
nonlinear model
Copyright notice Copyright © 2013 Australian Fracture Group
ISBN 9780646907208
Versions
Version Filter Type
Access Statistics: 216 Abstract Views  -  Detailed Statistics
Created: Mon, 19 Aug 2013, 13:16:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us