Fexura analysis of amounted composite plates

摘要

The suitability of two higher order shear deformation theories developed for the flexural analysis of homogeneous plates under transverse loading has been examined for the stress analysis of laminated composite pates, including interlaminar stresses, in this paper. The in-plane displacements in both cases are assumed t be quixotic in the thickness co-ordinate of the laminates, and nonparabolic and parabolic variations of transverse shear stresses across the thickness of the laminates are assumed for the first and second theories, respectively. The results are compared with the exact solution of Pagano given for a cylindrical ending problem. The study shows that transverse displacement, in-plane displacements, strains and stresses are accurately predicted in both cases. The study shows that transverse displacement, in-plane displacements, strains and stresses are accurately predicted in both cases. The special feature of he second theory is that transverse normal stress across the thickness of the laminate is reasonable accurately predicted using constitutive equations for the thick laminated plates of aspect ratios 20 and 25 though it shows an unrealistic discontinuity at the interfaces of the amanitas.