Abstract:

In this paper based on modified H-R mixed variational principle for composite materials，with the stressstrain relations directly，derivation of a new mode of stress，the hybrid and isoparametric finite element formulation for the laminated composite plate was established. Then the Mathematica was applied for the programming and calculating of a numerical example. Compared with the modeling analysis result using Abaqus software and the exact solution provided in relevant literatures concerning some mechanical quantities，the result obtained in this way is proved to be closer to their exact solutions and satisfactory precision can be obtained with less mesh.

Key words: composite materials, hybrid finite element, isoparametric element, Mathematica