Application of Imperialist Competitive Algorithm for Material Properties Characterization from Sharp Indentation Test

A. Biabangard-Oskouyi1,*, E. Atashpaz-Gargari2, N. Soltani1 and C. Lucas2

A. Biabangard-Oskouyi1,*, E. Atashpaz-Gargari2, N. Soltani1 and C. Lucas2
1Experimental Mechanics and 2Control and Intelligent Processing Centers of Excelence of Iran, University of Tehran, P.O. Box 14395-515, Tehran, Iran
*Corresponding Author Email: amirbiabangard@yahoo.com

ABSTRACT
IIn this paper a novel technique is proposed to characterize the elasto-plastic properties of materials from sharp indentation test. By finite element modeling, the indentation test response is obtained for a wide range of elasto-plastic properties. Finite element results are utilized to train a multi-layer perceptron artificial neural network which predicts indentation test response from elasto-plastic properties. Finally a new optimization algorithm inspired from historical imperialist competition called “Imperialist Competitive Algorithm” is employed for material properties evaluation from indentation test curve. Results obtained from applying the proposed method to a variety of sharp indentation test responses, show the capability of the proposed method for interpreting the indentation test responses and material properties determination

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