In this study, the computer program COMSHELL that is able to analyse the laminated composite structures is developed by improving the four-node shell element based on the assumed strain field that was already developed lately and its performance for static linear problems is evaluated. This element is a four-node degenerated shell element based on the assumed strain field with the independent bending, inplane and transverse shear strain.
In general, two important things are nominated in finite element analysis of laminated composite structures. Firstly, there is Locking problem because the composite products are produced thinly. Secondly, there is transverse deformation problem because of the anisotropic properties of composites.
In this study, various numerical examples are solved and the solutions are compared with other available finite element solutions and classical lamination theory. The results show that the present element yields accurate solutions for the test problems presented. Convergence characteristics are good. The element is also shown to be free of these problems even for thin laminates with the different boundary conditions and lamina lay-up. And the cylindrical laminated composite shell under internal pressure is analysed for the various fiber orientations.
