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Matrix Cracking and Delmaination in Laminated Composite Plates Due to Impact

적층복합판의 충격에 의한 모재균열 및 층간분리에 관한 연구

  • Kim, Moon-Saeng (Dept.of Mechanical Design Engineering, , Busan National University) ;
  • Park, Seung-Bum (Mechanical Technology Research Center, Busan National University)
  • 김문생 (부산대학교 기계설계공학과, 기계기술연구소) ;
  • 박승범 (부산대학교 기계기술연구소)
  • Published : 1997.01.01

Abstract

An investigation was performed to study the matrix cracking and delamination in laminated composite plates due to transverse impact. A model was developed for predicting the initiation of the matrix cracking and the shape and size of impact-induced delamination in laminated composite plates resulting from the ballistic impact. The model consists of a stress analysis and a failure analysis. A transient finite element analysis which was based on the higher-order shear deformation theory was adopted for calculating the stresses inside the laminated composite plates during impact. A failure analysis was used to predict the initial intraply matrix cracking and the shape and size of the interface delamination in the laminates. As a results, a shear matrix cracking which was governed by the transverse interlaminar shear stress occured at the middle layer near the midplane of laminates and a bending matrix cracking which was governed by the transverse inplane stress occured at the bottom layer near the surface of laminates. In a thick laminates, a shear matrix cracking generated first at the middle layer of laminates, but in a thin laminates, a bending matrix cracking generated first at the bottom layer of laminates.

Keywords

Laminated Composite Plates;Shear Matrix Cracking;Bending Matrix Cracking;Delamination;Failure Criteria