Loading...
Search for:
plastic-limit
0.005 seconds
Plastic Analysis of Two Dimensional Frames using Ant Colony Algorithms
, M.Sc. Thesis Sharif University of Technology ; Jahanshahi, Mohsen (Supervisor)
Abstract
In previous decades, easy access to material and low cost human power allow the product process to be performed in a preferred way. The limit in amount of material, economy, and the efficiency of the model has not been influential like these days. Today, the effective use of material and consideration of an economic model have great importance. It is obvious that a process of designing implies optimizing which the range of its using is also continuing in many engineering sciences. Many optimization issues contain discrete nature. Many of searching spaces that we encounter in the real world applications are not necessarily continuous as a condition which has crucial importance for classic...
On the efficiency of artificial neural networks for plastic analysis of planar frames in comparison with genetic algorithms and ant colony systems
, Article Neural Computing and Applications ; 2016 , Pages 1-19 ; 09410643 (ISSN) ; Maleki, E ; Ghiami, A ; Sharif University of Technology
Springer-Verlag London Ltd
Abstract
The investigation of plastic behavior and determining the collapse load factors are the important ingredients of every kinematical method that is employed for plastic analysis and design of frames. The determination of collapse load factors depends on many effective parameters such as the length of bays, height of stories, types of loads and plastic moments of individual members. As the number of bays and stories increases, the parameters that have to be considered make the analysis a complex and tedious task. In such a situation, the role of algorithms that can help to compute an approximate collapse load factor in a reasonable time span becomes more and more crucial. Due to their...
Numerical assessment of a double step integration algorithm for J 2 plasticity with Armstrong-Frederick evolution of back stress
, Article Scientia Iranica ; Volume 19, Issue 5 , 2012 , Pages 1168-1179 ; 10263098 (ISSN) ; Sharif University of Technology
2012
Abstract
In this work a double step algorithm is presented for the integration of equations governing the behavior of von Mises material in plastic limit. The isotropic and kinematic hardenings employed are of general type and the evolution of back stress follows the Armstrong-Frederick rule. Theoretical and numerical aspects are discussed in detail and a comparison is made with the classical backward Euler method