Strength of UD-Fabric Hybrid Laminated Composite Joints Based on Progressive Failure Analysis

점진적 파손해석 기법을 이용한 일방향-평직 혼합 적층 복합재 체결부의 강도

  • 신소영 (경상대학교 대학원 항공공학과) ;
  • 안현수 (경상대학교 대학원 항공공학) ;
  • 권진회 (경상대학교 수송기계공학부, 항공기부품기술연구센터)
  • Published : 2002.05.01

Abstract

A finite element method based on the two-dimensional progressive failure analysis is presented for characterizing the strength and failure of the unidirectional-fabric hybrid laminated composite joints under pin loading. The 8-node laminated shell element is incorporated in the updated Lagrangian formulation. Various failure criteria including the maximum stress, Tsai-Wu, Yamada-Sun, and combinations of them are used in conjunction with the complete unloading stiffness degradation method. For the verification, joint tests are conducted for the specimens with various geometries. Although there are some differences depending on the geometry, the finite element model using the Yamada-Sun or the combined Yamada-Sun and Tsai-Wu criterion predicts the failure strength best.

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