Browsing by Author "Eraslan,A.N."

Now showing 1 - 4 of 4

Citation - Scopus: 13
Deformation Analysis of Elastic-Plastic Two Layer Tubes Subject To Pressure: an Analytical Approach
(2004) Eraslan,A.N.; Akiş,T.
Analytical solutions are obtained for axisymmetric elastic-plastic deformations in tightly fitted concentric tubes with fixed ends subjected to either internal or external pressure. Tresca's yield criterion and its associated flow rule are used to estimate the elastic-plastic response of the assembly. The closed form solutions for all elastic-plastic deformation stages are obtained by assuming linear hardening material behavior. Some numerical examples are handled using the mechanical properties of real engineering materials.
Citation - Scopus: 35
Elastoplastic Response of a Long Functionally Graded Tube Subjected To Internal Pressure
(2005) Eraslan,A.N.; Akis,T.; Civil Engineering
Plane strain analytical solutions to functionally graded elastic and elastic-plastic pressurized tube problems are obtained in the framework of small deformation theory. The modulus of elasticity of the tube material is assumed to vary radially according to a 2 parametric model in a general parabolic form. The analytical plastic model is based on Tresca's yield criterion, its associated flow rule and ideally plastic material behavior. Exact solutions of field equations for elastic and plastic deformations are obtained. It is shown that the elastoplastic response of the functionally graded pressurized tube is affected notably by the radial variation of modulus of elasticity. It is also shown mathematically that the nonhomogeneous solution presented here reduces to that of a homogeneous one by the appropriate choice of the material parameters. © TÜBİTAK.
Numerical Solutions of a Simplified Reactive Flow Model
(2007) Eraslan,A.N.; Akiş,T.
A simple model problem well describing the interaction of convection, diffusion and fast chemistry in laminar reactive flows is formulated. The model involves a minimum number of parameters which are chosen to be close to those in real problems so that the strong interaction of various important processes taking place in reactive flows can be evaluated. Dimensionless forms of the strongly coupled model equations are solved numerically using the collocation method. Steady-state solutions are obtained as the time-asymptotic solution of unsteady problems by using arbitrary initial profiles for temperature. Parametric analyses are performed to investigate the effect of important model parameters on the calculated temperature and concentration distributions.
Citation - Scopus: 7
Yielding of long concentric tubes under radial pressure based on von Mises criterion;
(2005) Akiş,T.; Eraslan,A.N.
The classical problem of a plain strain tube with free ends, subject to either internal or external pressure is extended to tightly fitted long concentric tubes with axially constrained ends. Making use of von Mises yield criterion, critical values of pressure leading to plastic flow are determined in terms of material properties and tube dimensions.