Use of bivariate gamma function to reconstruct dynamic behavior of laminated composite plates containing embedded delamination under impact loads

Sang Youl Lee, Jong-Su Jeon

Research output: Contribution to journalArticle


This study deals with a method based on the modified bivariate gamma function for reconstructions of dynamic behavior of delaminated composite plates subjected to impact loads. The proposed bivariate gamma function is associated with micro-genetic algorithms, which is capable of solving inverse problems to determine the stiffness reduction associated with delamination. From computing the unknown parameters, it is possible for the entire dynamic response data to develop a prediction model of the dynamic response through a regression analysis based on the measurement data. The validity of the proposed method was verified by comparing with results employing a higher-order finite element model. Parametric results revealed that the proposed method can reconstruct dynamic responses and the stiffness reduction of delaminated composite plates can be investigated for different measurements and loading locations.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalStructural Engineering and Mechanics
Issue number1
Publication statusPublished - 2019 Jan 1



  • Bivariate gamma function
  • Delaminated composite plates
  • Dynamic behavior
  • Micro-genetic algorithm
  • Stiffness reduction

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