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• W3120486789 endingPage "106266" @default.
• W3120486789 startingPage "106266" @default.
• W3120486789 abstract "• A novel testing device equipped with digital image correlation (DIC) measurements in a cryogenic environment was developed to obtain the flow stress curves of aluminum alloy sheets under biaxial stress state. • The flow stress curves under biaxial stress state are determined via the theoretical analyses and rigid punch bulging tests at RT, −140 °C and −160 °C. • The expansion ratio of surface and average deviation of thickness were proposed to analyze the effects of cryogenic temperatures on the formability and deformation uniformity of the Al-Cu-Mn alloy sheets. • The validity of calculated flow stress curves under biaxial stress state is illustrated by the cryogenic deep drawing simulations combined with the experiments. To study the formability and flow stress of an Al-Cu-Mn alloy sheet under biaxial stress state at various cryogenic temperatures, a geometric model of the bulged dome and a calculation method of the flow stress curves were newly proposed. Based on a novel testing device equipped with digital image correlation (DIC) measurements, the strain, displacement, bulging height, punch force and wall thickness were obtained during the rigid punch bulging at RT, −140 °C and −160 °C. The evaluation indexes regarding the expansion ratio of surface area and average deviation of thickness were proposed to analyze the effects of cryogenic temperatures on the formability and deformation uniformity of the Al-Cu-Mn alloy sheet. The expansion ratio of surface area at −160 °C is approximately 2.3 times greater than that of the RT. The average deviations of thickness are decreased by 9.1% and 37.0% at −140 °C and −160 °C with an identical bugle height, respectively. Based on the geometrical and stress models, the flow stress curves of the Al-Cu-Mn alloy sheet are determined under biaxial stress state at RT, −140 °C and −160 °C. The validity of calculated flow stress curves is illustrated by the cryogenic deep drawing simulations combined with the experiments. Furthermore, potential applications of the calculated flow stress curves are suggested to accurately analyze the deformation behavior and formability of the Al-Cu-Mn alloy sheet at cryogenic temperatures." @default.
• W3120486789 created "2021-01-18" @default.
• W3120486789 creator A5062803409 @default.
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• W3120486789 date "2021-04-01" @default.
• W3120486789 modified "2023-10-18" @default.
• W3120486789 title "Analyses on formability and flow stress of an Al-Cu-Mn alloy sheet under biaxial stress at cryogenic temperatures" @default.
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• W3120486789 doi "https://doi.org/10.1016/j.ijmecsci.2021.106266" @default.
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