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http://dx.doi.org/10.7234/composres.2018.31.5.177

Numerical Study on Inverse Analysis Based on Levenberg-Marquardt Method to Predict Mode-I Adhesive Behavior of Fiber Metal Laminate  

Park, Eu-Tteum (Department of Aerospace Engineering, Pusan National University)
Lee, Youngheon (Department of Aerospace Engineering, Pusan National University)
Kim, Jeong (Department of Aerospace Engineering, Pusan National University)
Kang, Beom-Soo (Department of Aerospace Engineering, Pusan National University)
Song, Woojin (Graduate School of Convergence Science, Pusan National University)
Publication Information
Composites Research / v.31, no.5, 2018 , pp. 177-185 More about this Journal
Abstract
Fiber metal laminate (FML) is a type of hybrid composites which consist of metallic and fiber-reinforced plastic sheets. As the FML has a drawback of the delamination that is a failure of the interfacial adhesive layer, the nominal stresses and the energy release rates should be determined to identify the delamination behavior. However, it is difficult to derive the nominal stresses and the energy release rates since the operating temperature of the equipment is restricted. For this reason, the objective of this paper is to predict the mode-I nominal stress and the mode-I energy release rate of the adhesive layer using the inverse analysis based on the Levenberg-Marquardt method. First, the mode-I nominal stress was assumed as the tensile strength of the adhesive layer, and the mode-I energy release rate was obtained from the double cantilever beam test. Next, the finite element method was applied to predict the mode-I delamination behavior. Finally, the mode-I nominal stress and the mode-I energy release rate were predicted by the inverse analysis. In addition, the convergence of the parameters was validated by trying to input two cases of the initial parameters. Consequently, it is noted that the inverse analysis can predict the mode-I delamination behavior, and the two input parameters were converged to similar values.
Keywords
Double cantilever beam test; Energy release rate; Nominal stress; Levenberg-Marquardt method; Inverse analysis;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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