A phenomenological approach for fatigue damage accumulation of CF/PEEK laminates under two-stage loading

Pavlou, D and Kourousis, K 2013, 'A phenomenological approach for fatigue damage accumulation of CF/PEEK laminates under two-stage loading', International Review of Mechanical Engineering, vol. 7, no. 7, pp. 1323-1328.


Document type: Journal Article
Collection: Journal Articles

Title A phenomenological approach for fatigue damage accumulation of CF/PEEK laminates under two-stage loading
Author(s) Pavlou, D
Kourousis, K
Year 2013
Journal name International Review of Mechanical Engineering
Volume number 7
Issue number 7
Start page 1323
End page 1328
Total pages 6
Publisher Praise Worthy Prize
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.
Subject Composite and Hybrid Materials
Solid Mechanics
Theoretical and Applied Mechanics
Keyword(s) Damage
Fatigue
CF/PEEK
Residual Strength
Non-Linear Model
Two-Stage Loading.
Copyright notice © 2013 Praise Worthy Prize S.r.l. - All rights reserved
ISSN 1970-8734
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