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1 Journal of Theoretical and Applied Mechanics

1 2020

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Multiobjective global optimization of mechanical systems with cracks

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Beluch W. , Dlugosz A.

Journal of Theoretical and Applied Mechanics

2020

tom Vol. 58 nr 2

553--564

The paper is devoted to the multiobjective shape optimization of cracked structures. The two main goals are: reduction of the negative crack influence of identified cracks and optimal design of structural elements to reduce the risk of crack occurrence and growth. NURBS (Non-Uniform Rational B-Splines) curves are used to model the structure boundaries. Global optimization methods in the form of evolutionary algorithms are employed. As different optimization criteria are considered simultaneously, the efficient multiobjective optimization method are applied. An in-house multiobjective evolutionary algorithm is proposed as an efficient optimization tool. The dual boundary element method is used to solve the boundaryvalue problem.