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Formability of similar and dissimilar friction stir welded AA 5182-H111 and AA ...
Leitão, C.; Emílio, B.; Chaparro, B. M.; Rodrigues, D. M.http://www.sciencedirect.com/science/article/B6TX5-4V4KPJ7-6/2/69e70bca89227102937e48ad003fff30
Material parameters identification: Gradient-based, genetic and hybrid optimiza...
Chaparro, B. M.; Thuillier, S.; Menezes, L. F.; Manach, P. Y.; Fernandes, J. V.This paper presents two procedures for the identification of material parameters, a genetic algorithm and a gradient-based algorithm. These algorithms enable both the yield criterion and the work hardening parameters to be identified. A hybrid algorithm is also used, which is a combination of the former two, in such a way that the result of the genetic algorithm is considered as the initial values for the gradi...
Study on the influence of work-hardening modeling in springback prediction
Oliveira, M. C.; Alves, J. L.; Chaparro, B. M.; Menezes, L. F.The main goal of this study is to evaluate the influence of work-hardening modeling in springback prediction in the first phase of the Numisheet'05 "Benchmark 3": the U-shape "Channel Draw". Several work-hardening constitutive models are used in order to allow the different materials' mechanical behavior to be better described: the Swift law (a power law) or a Voce type saturation law to describe the classical ...
A new approach for reverse analyses in depth-sensing indentation using numerica...
Antunes, J. M.; Fernandes, J. V.; Menezes, L. F.; Chaparro, B. M.This paper seeks to present a new approach to reverse analysis in depth-sensing indentation which makes use of numerical simulation. This methodology allows the results of experimental hardness tests acquired with single indenter geometry to be used to determine the plastic properties of materials. Forward and reverse analyses of high deformation three-dimensional numerical simulations of Vickers indentation te...
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