Determination of optimum parameters effect on stress distribution in orthotropic plates with quasi-square cut out using genetic algorithm

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Abstract

Many parameters affect the stress distribution around holes in perforated plates under tensile load. Rotation Angle (RA), Fiber Angle (FA), Load Angle (LA), bluntness (w), and shaped cut out (c) are design variables which influence the stress distribution. In this paper, the interaction effects of these parameters on the normalized stress are discussed. The optimum design of the perforated orthotropic plate is attempted in the presence of these parameters by Genetic Algorithm (GA) method. Based on the fitness function obtained from Lekhnitskii theory, the optimization model of stress distribution parameters was created using GA .Optimum parameters based to achieve possible minimum stress are predicted. Interaction of parameters affect the stress distribution around hole were investigated. Also, results showed that the type of material is an important factor influencing on minimum stress.The results show that stress distribution depends on the varied parameters and correct selection of these parameters causes the possible minimum stress.

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Journal of Solid and Fluid Mechanics
Volume 4, Issue 4 - Serial Number 4
May and June 2015
Pages 87-99

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