Forming Limit Prediction of BCC Materials under Non-Proportional Strain-Path by Using Crystal Plasticity

Mei Yang; Xiao Yan Zhang; Hao Wang

doi:10.4028/www.scientific.net/AMM.201-202.1110

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 201-202Forming Limit Prediction of BCC Materials under...

Forming Limit Prediction of BCC Materials under Non-Proportional Strain-Path by Using Crystal Plasticity

Abstract:

In this paper, the forming limit of a body-centered cubic (BCC) sheet metal under non-proportional strain-path is investigated by using the Marciniak and Kuczynski approach integrated with a rate-dependent crystal plasticity model. The prediction model has been proved to be effective in predicting Forming Limit Diagram (FLD) of anisotropic sheet metal with FCC type of slip systems[1]. The same model has been used to study the FLD under non-proportional strain-path of BCC slip systems numerically and experimentally. The agreement between the experiments and simulations is good. With crystal plasticity model well describing the crystal microstructure effect, our model can be used to predict the FLD of BCC sheet metal under complicated strain path in plastic forming process with good accuracy.

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Periodical:

Applied Mechanics and Materials (Volumes 201-202)

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1110-1116

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https://doi.org/10.4028/www.scientific.net/AMM.201-202.1110

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Online since:

October 2012

Authors:

Mei Yang, Xiao Yan Zhang, Hao Wang

Keywords:

Crystal Plasticity, Forming Limit, M-K Approach, Non-Proportional Strain-Path

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