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http://dx.doi.org/10.12989/sem.2019.69.6.667

Ant lion optimizer for optimization of finite perforated metallic plate  

Chaleshtaria, Mohammad H. Bayati (Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology)
Jafari, Mohammad (Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology)
Publication Information
Structural Engineering and Mechanics / v.69, no.6, 2019 , pp. 667-676 More about this Journal
Abstract
Minimizing the stress concentration around hypotrochoid hole in finite metallic plates under in-plane loading is an important consideration in engineering design. In the analysis of finite metallic plate, the effective factors on stress distribution around holes include curvature radius of the corner of the hole, hole orientation, plate's aspect ratio, and hole size. This paper aims to investigate the impact of these factors on stress analysis of finite metallic plate with central hypotrochoid hole. To obtain the lowest value of stress around a hypotrochoid hole, a swarm intelligence optimization method named ant lion optimizer is used. In this study, with the hypothesis of plane stress circumstances, analytical solution of Muskhelishvili's complex variable method and conformal mapping is employed. The plate is taken into account to be finite, isotropic and linearly elastic. By applying suitable boundary conditions and least square boundary collocation technique, undefined coefficients of stress function are found. The results revealed that by choosing the above-mentioned factor correctly, the lowest value of stress would be obtained around the hole allowing to an increment in load-bearing capacity of the structure.
Keywords
finite metallic plates; stress concentration factor; hypotrochoid hole; analytical solution; ant lion optimizer;
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