×

Application of digital image correlation to the study of planar anisotropy of sheet metals at large strains. (English) Zbl 1281.74003

Summary: The aim of this work is to measure and model the planar anisotropy of thin steel sheets. The experimental data are collected using the digital image correlation technique. This is a powerful tool to measure the strain field on differently shaped specimens subjected to large plastic deformations. In this manner, it is possible to observe the material behaviour under different stress-strain states, from small to large deformation conditions, on the entire specimen surface.
The experimental results on smooth and notched samples are used to characterize the flow stress curve after necking, and a nonassociated plastic flow rule is proposed to describe the anisotropic behaviour of the material. To compare the experimental data with the predictions of the adopted constitutive model, a novel method, based on the image correlation results, is implemented.

MSC:

74-05 Experimental work for problems pertaining to mechanics of deformable solids
74E10 Anisotropy in solid mechanics
74C20 Large-strain, rate-dependent theories of plasticity
94A08 Image processing (compression, reconstruction, etc.) in information and communication theory
PDFBibTeX XMLCite
Full Text: DOI

References:

[1] Chakrabarty J (2000) Applied plasticity. Springer, New York, Chap 6 · Zbl 0955.74002
[2] Hill R (1948) A theory of yielding and plastic flow in anisotropic metals. Proc Roy Soc Lond Ser A 193:281–297 · Zbl 0032.08805 · doi:10.1098/rspa.1948.0045
[3] Hosford WF (1979) On yield loci of anisotropic cubic metals. In: Proc of the 7th North American metalworking conf. (NMRC). SME, Dearborn, pp 191–197
[4] Hill R (1989) Theoretical plasticity of textured aggregates. Math Proc Camb Philos Soc 85:179–191 · Zbl 0388.73029 · doi:10.1017/S0305004100055596
[5] Hill R (1990) Constitutive modeling of orthotropic plasticity in sheet metals. J Mech Phys Solids 38:405–417 · Zbl 0713.73044 · doi:10.1016/0022-5096(90)90006-P
[6] Barlat F, Lege DJ, Brem JC (1991) A six component yield function for anisotropic materials. Int J Plast 7:693–712 · doi:10.1016/0749-6419(91)90052-Z
[7] Barlat F et al. (1997) Yielding function development for aluminium alloy sheets. J Mech Phys Solids 45:1727–1763 · doi:10.1016/S0022-5096(97)00034-3
[8] Karafillis AP, Boyce MC (1993) A general anisotropic yield criterion using bounds and a transformation weighting tensor. J Mech Phys Solids 41:1859–1886 · Zbl 0792.73029 · doi:10.1016/0022-5096(93)90073-O
[9] Zhou W (1994) A new orthotropic yield function describable anomalous behaviour of materials. Trans Nonferr Met Soc China 4:431–449
[10] Broggiato GB (2004) Adaptive image correlation technique for full-field strain measurement. In: Proceedings of ICEM12–12th international conference on experimental mechanics, Bari, Italy
[11] Lankford WI, Snyder SC, Bauscher JA (1950) New criteria for predicting the press performance of deep-drawing sheets. Trans ASM 42:1196–1232
[12] Ling Y (1996) Uniaxial true stress-strain after necking. AMP J Technol 5:37–48
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.