Bu-Ali Sina UniversityJournal of Stress Analysis2588-25975120200901Magneto-piezo-mechanical Stresses Analysis of a Porous FGPM Rotating Non-uniform Thickness Disc with Variable Angular Velocity3147351410.22084/jrstan.2020.21129.1133ENM.SaadatfarDepartment of Mechanical Engineering, University of Qom, Qom, Iran.M.H.ZarandiDepartment of Mechanical Engineering, University of Qom, Qom, Iran.Journal Article20200224The mechanical behavior of a fluid-saturated functionally graded porous piezoelectric material (FGPPM) rotating disc with variable angular velocity and thickness placed in a constant magnetic field was investigated. Due to variable angular velocity, the disc was subjected to Lorentz force in two directions: radial and circumferential. It was assumed the disc is power-law functionally graded in the radial direction. The disc is uniformly porous and its thickness varies as a function of radius. First, three coupled governing partial differential equations were converted to ordinary differential equations using the separation of variable technique. Then, equations were solved using Runge-Kutta and shooting methods for the case of fixed-free boundary condition. The effect of variable angular velocity, thickness profile, inhomogeneity index, porosity and magnetic field was investigated. The results demonstrate that considering angular acceleration for the disc has a considerable effect on the Lorentz force resulted by the magnetic field. Besides, the angular velocity constant has a significant effect on the stresses and displacements in the presence of the magnetic field.https://jrstan.basu.ac.ir/article_3514_30ddae5219349f0a1e1b3ae17a20f29b.pdf