EXPERIMENTAL ANALYSIS OF STRAIN EFFECT ON ANISOTROPIC COEFFICIENTS OF 6061 ALUMINUM SHEET USING DIGITAL IMAGE PROCESSING

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ARJMAND O.; GERDOOEI M.; KHOSRAVI H.; IZADPANAH S.

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Journal: JOURNAL OF SOLID AND FLUID MECHANICS Year:2016 | Volume:6 | Issue:1 Page(s): 73-84

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Title

EXPERIMENTAL ANALYSIS OF STRAIN EFFECT ON ANISOTROPIC COEFFICIENTS OF 6061 ALUMINUM SHEET USING DIGITAL IMAGE PROCESSING

Author(s)

ARJMAND O. | GERDOOEI M. | KHOSRAVI H. | IZADPANAH S. | Issue Writer Certificate

Keywords

DIGITAL IMAGE CORRELATIONQ1

REGULAR AND ACCIDENTAL GRID PATTERNSQ1

PLASTIC ANISOTROPIC COEFFICIENTQ1

Abstract

The anisotropy of mechanical property in sheet metals, due to the rolling process, causes useful effects such as increasing drawability and harmful effects like the earing phenomenon. In this work, the variation in the anisotropic coefficient during the uniaxial tension of the AA6061-O sheet is considered using the DIGITAL IMAGE CORRELATION technique by the two marking methods of regular arrays of circles and irregular accidental pattern. The meshed samples of this alloy are cut in the three directions 0, 45, and 90 degrees with respect to the rolling direction, and stretched by an Instron test machine. During the test, the transverse and longitudinal strains are measured, and then, using these two parameters, the anisotropic parameters in different directions, as more as the planar and normal anisotropic coefficients, are computed. It is demonstrated that during the straining on the samples, the anisotropic parameters in the 0 and 45 directions show a decreasing trend, and in the 90 direction, it has a wavy manner. The results obtained indicate that after 10 percent elongation, the normal and planar anisotropies of the sheet decrease by 51% and 63%, respectively. Finally, the plastic-hardening behavior of the sheet in different stages of the tension is studied using the Hill’s quadratic yield criterion, and it appears that the yield surface grows totally as an anisotropic manner.

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APA: Copy

ARJMAND, O., GERDOOEI, M., KHOSRAVI, H., & IZADPANAH, S.. (2016). EXPERIMENTAL ANALYSIS OF STRAIN EFFECT ON ANISOTROPIC COEFFICIENTS OF 6061 ALUMINUM SHEET USING DIGITAL IMAGE PROCESSING. JOURNAL OF SOLID AND FLUID MECHANICS, 6(1), 73-84. SID. https://sid.ir/paper/212788/en

Vancouver: Copy

ARJMAND O., GERDOOEI M., KHOSRAVI H., IZADPANAH S.. EXPERIMENTAL ANALYSIS OF STRAIN EFFECT ON ANISOTROPIC COEFFICIENTS OF 6061 ALUMINUM SHEET USING DIGITAL IMAGE PROCESSING. JOURNAL OF SOLID AND FLUID MECHANICS[Internet]. 2016;6(1):73-84. Available from: https://sid.ir/paper/212788/en

IEEE: Copy

O. ARJMAND, M. GERDOOEI, H. KHOSRAVI, and S. IZADPANAH, “EXPERIMENTAL ANALYSIS OF STRAIN EFFECT ON ANISOTROPIC COEFFICIENTS OF 6061 ALUMINUM SHEET USING DIGITAL IMAGE PROCESSING,” JOURNAL OF SOLID AND FLUID MECHANICS, vol. 6, no. 1, pp. 73–84, 2016, [Online]. Available: https://sid.ir/paper/212788/en

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