Journal
MATERIALS AND MANUFACTURING PROCESSES
Volume 24, Issue 3, Pages 375-383Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10426910802679881
Keywords
Aggregate-objective optimization; Planar anisotropy; Searching the extremum of the objective function with the evolution strategy; Yield function
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The aggregate-objective optimization technique has been used to assess the optimal set of coefficients of the Barlat yield criterion for anisotropic alloy sheets by means of the evolution strategy. The aggregate-objective problem has been quantified by the Euclidean-type objective function. Computational results indicate that standard procedures, based on three uniaxial yield stresses for different directions of loading in-plane, the balanced biaxial yield stress, and three Lankford coefficients of anisotropy determined for three different directions of loading in-plane, cannot be sufficient to assess unequivocally the Barlat yield criterion for anisotropic alloy sheets.
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