In this paper, ratcheting behavior of beams subjected to mechanical cyclic loads at elevated temperature, using the rate dependent Chaboche unified viscoplastic model with combined kinematic and isotropic hardening theory of plasticity, is investigated. A precise and general numerical scheme, using the incremental method of solution, is developed to obtain the cyclic inelastic creep and plastic...

Firstly, two kinds of natural distances between intuitionistic fuzzy sets are generated by the classical natural distance between fuzzy sets under a unified framework of residual intuitionistic implication operators. Secondly, the continuity and approximation property of a method for solving intuitionistic fuzzy reasoning are defined. It is proved that the triple implication method for intuitio...

Due to the changes which may occur in their parameters, systems are usually demonstrated by some subsystems for different conditions. This paper employs Modified Petri Nets (MPN) to model theses subsystems and makes it simple to analyze them. In this method, first, the continuous transfer function is converted to a discrete transfer function and then, by MPN, system is modeled and analyzed. All...

In this paper, a unified framework is proposed for constructing higher-order modifications of Newton’s method based on the existing iteration formulas. Some recently developed iterative methods are special cases of our approach. Also, many new iterative methods can be developed by using the proposed unified framework.

One approach to modeling and solving for economic equilibria relies on mathematical programming. These models solve for competitive equilibria. However, policy analysis often requires measuring the impacts of government price regulations that differ from the competitive equilibrium. In this paper we provide a unified framework for computing market equilibrium in mathematical programming models ...

it has been tried to compare the “price payment method” in iranian law with “principles of international commercial contracts” and “convention on contracts for international sale of goods vienna, 1980” in this study. different law regulations in various countries should be unified in order to extend rapid and insured trusted law relations among the nations and people all over the world because ...

Abstract In this paper, we propose a semi-smooth Newton method and primal-dual active set strategy to solve dynamical contact problems with friction. The conditions of Coulomb’s friction can be formulated in the form fixed point problem related quasi-optimization one thanks method. This is based on use (PDAS) strategy. main idea here find correct subset $\mathcal{A}$ <mml:math xmlns:mml="http:/...