A smooth evolutionary structural optimization procedure applied to plane stress problem

2014 ◽  
Vol 75 ◽  
pp. 248-258 ◽  
Author(s):  
Hélio Luiz Simonetti ◽  
Valério S. Almeida ◽  
Luttgardes de Oliveira Neto
Keyword(s):  
Structural Optimization ◽  
Plane Stress ◽  
Optimization Procedure ◽  
Stress Problem ◽  
Evolutionary Structural Optimization ◽  
Plane Stress Problem

A New ERR and Strategy for Bi-Directional Evolutionary Structural Optimization

2012 ◽  
Vol 204-208 ◽  
pp. 4422-4428
Author(s):  
Da Ke Zhang ◽  
Wen Pan Zhang ◽  
Han He ◽  
Chong Wang
Keyword(s):  
Structural Optimization ◽  
Stress Level ◽  
Optimization Procedure ◽  
Optimal Process ◽  
Removal Ratio ◽  
Rejection Ratio ◽  
Evolutionary Structural Optimization ◽  
Rejection Criterion ◽  
Element Addition ◽  
Element Removal

The efficiency of the element removal or addition is of significance for evolutionary structural optimization (ESO) process. The key is to find an appropriate rejection criterion (RC) which allows to assess the contribution of each element to the specified behavior（stress, stiffness, displacement, etc.）of the structure, and to subsequently remove elements with least contribution. This paper proposed a varying elements removal ratio (VERR) method which uses a larger ERR (Element Rejection Ratio) value at early iterations where exist a lot of redundant material, and decreases the value of ERR in the optimal process to lessen the number of elements removed at later iterations. Meanwhile, this paper proposed a strategy for element addition based on stress level and the contribution of elements to the structure in order to decide which elements should be added to the model and the sequence of the element addition. With the proposed VERR and the strategy, the optimization procedure of the structure evolves more quickly and smoothly.

On the Generalized Plane Stress Problem, the Gregory Decomposition and the Filon Mean Method

2011 ◽  
Vol 108 (1) ◽  
pp. 1-28 ◽  
Author(s):  
Min-Zhong Wang ◽  
Bai-Xiang Xu ◽  
Bao-Sheng Zhao
Keyword(s):  
Plane Stress ◽  
Stress Problem ◽  
Plane Stress Problem

Elastic Equilibrium of a Plate With a Reinforced Elliptical Hole

1960 ◽  
Vol 27 (2) ◽  
pp. 283-288 ◽  
Author(s):  
Eugene Levin
Keyword(s):  
Circular Hole ◽  
Thin Plate ◽  
Plane Stress ◽  
Complex Variable ◽  
Elliptical Hole ◽  
Elastic Equilibrium ◽  
Stress Problem ◽  
Elliptical Ring ◽  
Plane Stress Problem ◽  
Digital Computers

An infinite thin plate with an elliptical hole reinforced by a confocal elliptical ring is subjected to loads in the plane. A solution to the generalized plane-stress problem is obtained using the complex variable techniques of Muskhelishvili. The result is presented in a form well suited to evaluation by digital computers. Specialization to a circular hole with a negligibly thin reinforcement is shown to be in agreement with results obtained by other authors.

Sign in / Sign up

Export Citation Format

Share Document