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Degradation Models of Unidirectional Laminated Board in Consideration of Volume Fraction of Reinforced Fiber and Temperature |
WU Yifan, WEN Weidong( ), CUI Haitao, ZHANG Hongjian |
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Cite this article:
WU Yifan, WEN Weidong, CUI Haitao, ZHANG Hongjian. Degradation Models of Unidirectional Laminated Board in Consideration of Volume Fraction of Reinforced Fiber and Temperature. Chinese Journal of Materials Research, 2021, 35(12): 893-902.
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Abstract The conventional fatigue damage factor was redefined by analyzing the relevant fatigue damage mechanisms in detail. Then, a model of residual-stiffness and -strength was individually proposed in consideration of the influence of reinforced fiber volume fraction and temperature on the properties of unidirectional fiber reinforced composites. Furthermore, by introducing temperature correction parameters into the above models of room temperature, a correlation model of residual strength with residual stiffness was further acquired, therewith the establish of residual strength model may be facilitated by reducing the dependance on the number of residual strength tests, and relieving the effect of data dispersion as well. Finally, the fatigue test data and residual strength test data of composite collected from the existing literatures were fitted and verified, it follows that the residual stiffness model and residual strength model can accurately describe the degradation behavior of residual stiffness and residual strength. The residual stiffness model can be also used to predict the degradation behavior of the residual stiffness of the composite with different fiber volume fraction at different temperature.
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Received: 19 October 2020
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Fund: National Science and Technology Major Project of China(2017-IV-0007-0044) |
About author: WEN Weidong, Tel: 13601401667, E-mail: gswwd@nuaa.edu.cn
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