Abstract
A residual stiffness degradation model, which has been proved to be capable of estimating the cumulative damage in composite laminates under constant amplitude loading, is used to investigate the fatigue damage of composite laminates subjected to service loading spectra. Baseline stiffness reduction data under spectrum loadings are incorporated in this model to predict the statistical distributions of the residual stiffness as well as the residual stiffness of an individual specimen. An empirical failure criterion is proposed and fatigue life distributions for composite laminates subjected to different levels (or severities) of spectrum loadings are theoretically derived. Experimental tests were conducted on graphite/epoxy laminates to generate statistically meaningful data for the verification of the theoretical approaches presented. Experimental test results demonstrate that the predictive capabilities of the proposed theoretical methods are quite satisfactory.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.