Abstract

The fiber pre-tension is one of techniques that used to improve the properties of fibrous composite plate. In this paper, we study the fiber pre-tension effect on dynamic behavior for composite plate. The natural frequency and mode shapes studied for pre-tensioned fiber composite plate. The pre-stressing ranges(2¬¬-¬¬¬¬20MPa) applied on the fibers during curing process at room temperature. Dynamic model achieved using finite element to get the natural frequencies and modes shape and compare the results with analytical solution by used iteration of JACOBI method that solved by using FORTRAN language. The results show that the Fiber pre-tension will increasing the natural frequency (ωn) of cantilever composite plate by (53%) and the modes shape show that the models will deform in three directions (Z , θx , and θy ) for most modes. Key words: Composite Plate , Fiber Pre-tension, Natural frequency, Modes shape