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- W1924721046 abstract "Forming limit curves (FLCs) are used to determine the amount of deformation that can be applied to a sheet metal before the onset of a localized neck. Most FLCs are shown in strain space, and stress-based FLCs have advantages because they are often strain-path independent. The current study develops a method to calculate a stress-based forming limit curve. The necessary data for this calculation can be obtained from a uniaxial tensile test. The calculations depend on the Z parameter, which can be considered to be the point of instability during a tensile test. With the use of the Keeler–Brazier equation, the effective stress in plane strain at the forming limit is shown to be a function of the Z parameter and thickness. Data from 4 experimental studies are shown to be consistent with this function. With the generally accepted observation that the left side of the strain-based FLC is a line with slope of –1 and an appropriate constitutive model for the stress-strain behavior of the material, the stress-based FLC corresponding to the left side of the strain-based FLC can be calculated. Comparison of the calculated stress-based FLC for three steels with the stress-based FLC determined directly from the strain-based FLC shows good agreement. The calculated stress-based FLC is 15–20 MPa below the data generated directly from the strain-based FLC." @default.
- W1924721046 created "2016-06-24" @default.
- W1924721046 creator A5023980229 @default.
- W1924721046 creator A5082366094 @default.
- W1924721046 date "2016-03-01" @default.
- W1924721046 modified "2023-10-16" @default.
- W1924721046 title "An approach to predicting the forming limit stress components from mechanical properties" @default.
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- W1924721046 doi "https://doi.org/10.1016/j.jmatprotec.2015.10.027" @default.
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