Finite Element Analysis of Plastic Yielding at a Circular Hole in a Laminated Composite Plate Based on Refined Plate Theory

  • Tasneem Pervez


An elastic-plastic analysis of anisotropic laminated composite plate with a hole is carried out using a two dimensional finite element model based on higher order shear deformation theory (HSDT) of anisotropic laminated composite plates. The variation in material properties through thickness is made possible by discrete layer approach. The generalized Huber-Mises yield criterion, developed by Hill, for anisotropic material, is used to determine the onset of plastic flow. The inclusion of anisotropic parameters of plasticity generalizes the plastic yield function. These anisotropic parameters of plasticity are updated during the work hardening history of anisotropic laminated composite plate. The plastic potential, which is an anisotropic yield function, is used to determine an associated flow rule. Finally, an elastic-plastic incremental constitutive relation is obtained using finite element method. By means of an incremental and iterative procedure, the numerical solution of deformation problems in nonlinear anisotropic laminated plates is achieved based on first order shear deformation theory and higher order shear deformation theory. The transverse shear effects on the load deformation characteristics and on the spread of plastic zones around the circular hole are discussed. This method yields accurate values for transverse shear stresses as compared to other shear deformation theories and hence the growth of plastic zones.


Plastic Zone Transverse Shear Circular Hole Laminate Plate Shear Deformation Theory 
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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Tasneem Pervez
    • 1
  1. 1.Faculty of EngineeringInternational Islamic University MalaysiaMalaysia

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