Functionally Graded (FG) materials are recent types of engineering materials Fdeveloped as a solution for applications where a couple of relevant properties of different materials are desired in a single continuous composite structure. In these materials, properties are patterned in a way to insure a gradient and continuous property transition direction-wise. This study is a contribution in the literature among other studies but provides an additional understanding of FG Plate structures vibrational behavior in terms of natural frequencies and modal shapes. For this end, an FG plate is modelized and analyzed using AnsysAPDL. Two boundary conditions (all sides clamped “CCCC” and two parallel sides clamped with two others free “CCFF”) for the same plate element and two power law indices “n” are considered. Results are compared with those in the literature and conclusions are drawn accordingly.

In the manufacturing process of functionally graded (FG) structures, it is common to observe the formation of porosities within the material. Therefore, it’s important to consider the existence of these micro voids at the design level. In this study, a realistic approach to the vibrational analysis of FG plates considering porosity is presented. For different porosity distributions and boundary conditions, vibrational behavior of a square plate is analyzed using ANSYS Workbench. The influence of porosity is investigated. It is concluded that the higher the void percentage, the lower are the natural frequencies. It is also deduced that porosity distribution is a middle ground between the non-porous and uniformly distributed porosity pattern.