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http://dx.doi.org/10.20910/JASE.2019.13.6.26

Progressive Filure Analysis of Composite Double Bolted Joints using Gradual Degradation Model  

Kim, Pyunghwa (Graduate School of Korea Aerospace University)
Kim, Sungmin (Graduate School of Korea Aerospace University)
Doh, Sungchul (Graduate School of Korea Aerospace University)
Yoon, Donghyun (Graduate School of Chungnam National University)
Park, Jungsun (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
Publication Information
Journal of Aerospace System Engineering / v.13, no.6, 2019 , pp. 26-35 More about this Journal
Abstract
In this paper, progressive failure analysis is performed on composite joints widely used in various industries such as the aerospace industry. The analysis was conducted on single bolted joints to confirm its reliability and in succession on double-bolted composite joints as well to study the characteristics of progressive failure. Hashin failure criteria and EGDM (energy based gradual degradation model) were used for the analysis. Failure variables are defined by four failure modes, respectively. According to the variables, stiffness degradation has been calculated. As a result of comparing the test and analysis results of single-bolted joints, the error was below 5% and it showed that the analytical results are rather credible. Also, the parametric analysis consequences were obtained conducting the process-progressive failure analysis on the double-bolted composite joints considering edge-distance ratio (e/d ratio) and bolt spacing.
Keywords
Finite Element Method; Progressive Failure Analysis; Hashin Failure Criteria; Gradual Degradation Model; Composite Bolted Joint;
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