Journal
COMPOSITES PART B-ENGINEERING
Volume 61, Issue -, Pages 282-290Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2014.01.056
Keywords
Laminates; Fatigue; Damage mechanics; Multiaxial fatigue
Funding
- Danish Centre for Composite Structures and Materials for Wind Turbines (DCCSM) from the Danish Strategic Research Council [09-067212]
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In this work an experimental investigation on damage initiation and evolution in laminates under cyclic loading is presented. The stacking sequence [0/theta(2)/0/-theta(2)](s) has been adopted in order to investigate the influence of the local multiaxial stress state in the off-axis plies and the possible effect of different thickness between the thin (2-plies) and the thick (4-plies) layers. Results are presented in terms of S-N curves for the initiation of the first cracks, crack density evolution, stiffness degradation and Paris-like curves for the crack propagation phase. The values of the off-axis angle 0 has been chosen in order to obtain local multiaxial stress states in the off-axis plies similar to those in previous studies for biaxially loaded tubes. Results concerning damage initiation and growth for these two specimen configurations are shown to be consistent for similar local multiaxial stress states. (C) 2014 Elsevier Ltd. All rights reserved.
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