@inproceedings{9f70142755ec430eafc8c7fca31e5d0f,
title = "A stochastic fatigue damage model for composite single lap shear joints based on Markov chains and thermoelectric stress analysis",
abstract = "Quantitative damage detection in composite single lap joints during fatigue is difficult and not practical with many traditional experimental methods. The objective is to apply stochastic Markov chain methods to model the fatigue damage evolution in composite materials subjected to cyclic mechanical loadings and monitored by infrared thermography (IR-T) techniques. The IR signal from the surface of S2-glass/E733FR single lap joints is captured continuously during constant amplitude fatigue loadings. The IR testing has high thermal sensitivity below 10mK and the image integration is synchronized with the me-chanical loa ding. Damage metrics are developed for the composite samples based on developing delamination fronts as evaluated by the thermoelastic stress analysis (TSA) technique. The IR-TSA damage index at the last fatigue cycle is used to calibrate the Markov chain models (MCMs). The damage predictions of the MCMs are then examined at different fatigue cycles. A new method is pr oposed to construct a stochastic S-N curve utilizing the MCMs. The pr o-posed IR-TSA with MCMs is shown to be very effective in predicting the damage evolution and allowed constructing a wide-range of stochastic S-N curves for composite single lap shear joints. This study also presents a new remote sensing and non-destructive evalu ation technique combined with new statistical approaches to reduce the number of lab tests in developing inspection protocol for preventing fatigue failures.",
author = "S. Johnson and Wei, {B. S.} and R. Haj-Ali",
year = "2008",
language = "אנגלית",
isbn = "9781605605036",
series = "American Society for Composites - 23rd Technical Conference of the American Society for Composites 2008",
pages = "1375--1392",
booktitle = "American Society for Composites - 23rd Technical Conference of the American Society for Composites 2008",
note = "23rd Technical Conference of the American Society for Composites 2008 ; Conference date: 09-09-2008 Through 11-09-2008",
}