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A new fatigue failure theory for multidirectional fiber-reinforced composite laminates with arbitrary stacking sequence

Dong, H., Li, Z., Wang, J. and Karihaloo, Bhushan 2016. A new fatigue failure theory for multidirectional fiber-reinforced composite laminates with arbitrary stacking sequence. International Journal of Fatigue 87 , pp. 294-300. 10.1016/j.ijfatigue.2016.02.012

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Abstract

Fatigue failure is one of the most important failure types of fiber-reinforced composites. In this paper, a new fatigue failure theory for multidirectional fiber-reinforced composite laminates with an arbitrary stacking sequence is developed, by combining nonlinear residual strength and residual stiffness models with the recently improved Puck’s failure theory which includes the in situ strength effect. This fatigue theory can predict the fatigue life, residual strength and residual failure envelope of fiber-reinforced composite laminates under multidirectional loadings. For these predictions it is necessary to recalculate the fatigue lives of laminae after each cycle since the stresses in the laminae change due to stiffness degradation. It is also necessary to account for the nonlinear accumulation of damage at the new stress level in the laminae resulting from stiffness degradation. This is achieved by using the concept of equivalent cycle. The theoretical predictions are in good agreement with available experimental results.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Composites; Life prediction; Multiaxial fatigue; Residual strength; S–N curves
ISSN: 0142-1123
Date of First Compliant Deposit: 5 July 2016
Date of Acceptance: 5 February 2016
Last Modified: 04 Jun 2017 09:13
URI: http://orca.cf.ac.uk/id/eprint/92347

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