Buckling and postbuckling of composite panels with cutouts subjected to combined edge shear and temperature change

Abstract The results of a detailed study of the buckling and postbuckling responses of composite panels with central circular cutouts are presented. The panels are subjected to combined edge shear and temperature change. The panels are discretized by using a two-field degenerate solid element with each of the displacement components having a linear variation throughout the thickness of the panel. The fundamental unknowns consist of the average mechanical strains through the thickness and the displacement components. The effects of geometric nonlinearities and laminated anisotropic material behavior are included. The stability boundary, postbuckling response and hierarchical sensitivity coefficients are evaluated. The hierarchical sensitivity coefficients measure the sensitivity of the buckling and postbuckling responses to variations in the panel stiffnesses, and the material properties of both the individual layers and the constituents (fibers and matrix). Numerical results are presented for composite panels with central circular cutouts subjected to combined edge shear and temperature change, showing the effects of variations in the hole diameter, laminate stacking sequence and fiber orientation, on the stability boundary and postbuckling response and their sensitivity to changes in the various panel parameters.

[1]  Michael P. Nemeth,et al.  Buckling and postbuckling behavior of square compression-loaded graphite-epoxy plates with circular cutouts , 1990 .

[2]  Ahmed K. Noor,et al.  Transverse Shear Stresses and Their Sensitivity Coefficients in Multilayered Composite Panels , 1994 .

[3]  Ya-Jung Lee,et al.  A study on the buckling behavior of an orthotropic square plate with a central circular hole , 1989 .

[4]  Jacob Aboudi,et al.  Micromechanical Analysis of Composites by the Method of Cells , 1989 .

[5]  A. V. Krishna Murty,et al.  Stability of laminated composite plates with cut-outs , 1992 .

[6]  S. Tsai,et al.  Introduction to composite materials , 1980 .

[7]  M. P. Kamat,et al.  Post-buckling response of isotropic and laminated composite square plates with circular holes , 1987 .

[8]  Psang Dain Lin,et al.  Thermal buckling behaviour of composite laminated plates with a circular hole , 1991 .

[9]  J. Aboudi.  Mechanics of composite materials - A unified micromechanical approach , 1991 .

[10]  Michael W. Hyer,et al.  Postbuckling failure of composite plates with holes , 1992 .

[11]  Jeng-Shian Chang,et al.  THERMAL BUCKLING ANALYSIS OF ISOTROPIC AND COMPOSITE PLATES WITH A HOLE , 1990 .

[12]  Chien-chang Lin,et al.  Buckling of Laminated Plates with Holes , 1989 .

[13]  Kevin M. Jones,et al.  Buckling analysis of fully anisotropic plates containing cutouts and elastically restrained edges , 1992 .

[14]  M. P. Nemeth.  A buckling analysis for rectangular orthotropic plates with centrally located cutouts , 1984 .

[15]  Michael P. Nemeth,et al.  Buckling behavior of compression-loaded symmetrically laminated angle-ply plates with holes , 1986 .

[16]  Michael P. Nemeth,et al.  An Approximate Buckling Analysis for Rectangular Orthotropic Plates with Centrally Located Cutouts. , 1986 .

[17]  S. Lee,et al.  A solid element formulation for large deflection analysis of composite shell structures , 1988 .

[18]  Ya-Jung Lee,et al.  Buckling analysis of composite laminates , 1989 .

[19]  Ahmed K. Noor,et al.  Thermomechanical buckling of multilayered composite panels with cutouts , 1994 .