Peridynamics is a nonlocal theory for dynamic fracture analysis consisting in second order time partial integro-differential equation. In this paper, we consider nonlinear model of peridynamics two-dimensional spatial domain. We implement spectral method the space discretization based on Fourier expansion solution while Newmark-? marching. This computational approach takes advantages from convo...

In this work we deal with the numerical solution of the fluid-structure interaction problem arising in the haemodynamic environment. In particular, we consider BDF and Newmark time discretization schemes, and we study different methods for the treatment of the fluid-structure interface position, focusing on partitioned algorithms for the prescription of the continuity conditions at the fluid-st...

In this paper, a nine degree-of-freedom dynamic model of the ball screw feed system considering contact nonlinearity between balls and raceways is established to analyze vibration characteristics. The position relationship raceway centers for bearings determined by using homogeneous coordinate transformation, then restoring force functions along axial lateral directions are derived. equations s...

The aim of this research was an investigation into norm extraction regarding the domestication and foreigni- zation of culture specific items (CSIs) in the children‟s literature in the last four years (from 1393 to 1396). The corpus of this study was 8 English children‟s books with their Persian translated versions. The theoreti- cal fra...

The vibration phenomenon represents the cause of many problems in metal cutting processes. It has a big influence on the quality of the machining operation, tool life and machine precision. Drilling operation is a common metal cutting process where quality of the hole form is often a critical issue. Therefore, it was necessary to predict these vibrations. The first part of this paper deals with...

A method is presented for calculating the seismic response of a system of horizontal soil layers. The essential element of the method is a rheological model suggested by Iwan which takes account of the nonlinear hysteretic behavior of soils and has considerable flexibility for incorporating laboratory results on the dynamic behavior of soils. Finite rigidity is allowed in the underlying elastic...

Linear stability analysis is inadequate for integrators designed for nondissipative systems such as Hamiltonian systems in which nonlinear effects are often decisive. Mathematical theory exists (KAM theory) for rigorous analysis of small perturbations from equilibria, but it needs to be expressed in a form that is more easily applicable to the study of area-preserving maps. We have pursued this...

Some alternative formulations for transient dynamic response optimization are described and analyzed. A critical review and comparative study of the formulations are presented. The key feature of the formulations is that the state variables, in addition to the real design variables, are treated as independent variables in the optimization process. The state variables include different combinati...

This paper is concerned with the estimation of the numerical stability and rate-of-convergence of finite element approximations of transient solutions of a rather wide class of non-linear hyperbolic partial differential equations. The equations of motion of practically all homogeneous hyperelastic bodies, including both physically non-linear materials and finite amplitude motions, fall within t...

the human learns language in his milieu and society. in each society, this language relates between all people. every language, specially arabic language with its valuable synonyms that have the distinguished significance and with its collocation power, pave the way for formation the language signs in wide and extreme surface. in linguistic, language is an organization of signs. because languag...