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- W2169732023 abstract "Strain gradients have a beneficial effect on the initiation of necking and ductile fracture in metal sheets. Thus, the use of classical failure criteria, assuming a uniform stress distribution across the thickness, is highly questionable for the study of sheet formability. This work suggests a new approach to describe the mechanism of failure under stretch-bending conditions that accounts for the strain/stress gradient through the sheet thickness. The analysis recognises that necking and fracture should be controlled by the development of damage in a material volume located at the inner side and outer side of the sheet, respectively. The proposed model of failure has yielded successful results for different metal sheets, such as 1008 AK and H340LAD steels, 70/30 brass, and 6010 and 7075-O aluminium alloys. The analysis suggests that the critical material volume in both modes of failure could be related to the material microstructure." @default.
- W2169732023 created "2016-06-24" @default.
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- W2169732023 date "2013-09-01" @default.
- W2169732023 modified "2023-09-30" @default.
- W2169732023 title "Assessment of the effect of the through-thickness strain/stress gradient on the formability of stretch-bend metal sheets" @default.
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- W2169732023 doi "https://doi.org/10.1016/j.matdes.2013.03.086" @default.
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