期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 60, 期 15, 页码 2819-2828出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0266-3538(00)00150-0
关键词
stiffness degradation; S/N curves; reliability; glass/polyester; off-axis; fatigue
The fatigue behaviour of a multidirectional, [0(+/-45)(2)/0](T) glass/polyester laminate under various loadings conditions is studied in this paper. Series of coupons cut on- and off-axis, at seven different orientations, were uniaxially loaded at constant amplitude over a wide range of R ratios. Test data were subjected to statistical analysis and S/N curves at specific reliability levels were calculated. Stiffness changes were continuously monitored during fatigue testing, and design curves corresponding to a certain level of stiffness reduction, and not to failure, were determined. It is shown, for the material studied in this work, that stiffness-based and reliability S./N curves are correlated and therefore determination of fatigue design allowables bearing information on both stiffness loss and strength can be formulated. (C) 2000 Elsevier Science Ltd. All rights reserved.
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