Saad Essa

Erbil polytechnic university · Civil Engineering

This paper is to justify the assumption feature of the functionally graded elastic moduli for both direction x-y and effect on the distribution of Poisson’s ratio throughout the angle of lamina fibers between 0 to 90 degrees. In addition, the failure criterion theory is studied with consequences of the change in elasticity. Tsai-Hill failure criter...

An approximate method is developed to analyze the deflection in beams and beam-column by solving the differential equation for the elastic deformation of beam and beam-column. The analysis is performed using the central difference of finite difference method for the Euler-Bernoulli beam and beam-column supported on an elastic, nonlinear foundation...

Building codes and standards include methods and provisions for deflection control and determining minimum thickness of slabs and beams, also determining the immediate and long or time-dependent deflection. The ACI code depth-span limitations tabulated for normal weight concrete and specified yield strength of steel, for other values of steel yield...

An approximate method is developed to analyze the deflection in beams and beam- column by solving the differential equation for the elastic deformation of beam and beam-column. The analysis is performed using the central difference of finite difference method for the Euler-Bernoulli beam and beam-column supported on an elastic, nonlinear foundation...

Analytical solutions are developed for the analysis of elastic polar orthotropic functionally graded annular disks rotating with constant angular velocity. The formulations are carried out by presuming a state of plane stress and small deformations. The elasticity moduli and thickness are varied radially by a nonlinear function controlled by three...

The main purpose of this study is comparing two methods to get the convergence of two series nonlinear spring system. The key method is Broyden's method which based on the Jacobian matrix to update the inverse of the secant stiffness matrix and the results are compared with the Newton–Raphson's method. A constant force is applied to the second node...

I n this study, analytical solutions are presented for the polar orthotropic functionally graded annular disks having variable profile and rotating with constant angular velocity. The formulations were performed by referring to polar coordinate system. Small deformations, state of plane stress and rotational symmetry were presumed in the formulatio...

An analytical and numerical solution for the one dimensional of heat conduction in a slab exposed to different temperature at both ends is presented. The distribution of heat throughout the transient direction obeys to functionally graded (FG) temperature based on Dirichlet boundary conditions. The variation of functionally graded temperature can b...