Relationship among mechanical properties anisotropy, microstructure and texture in AA 6111 alloy sheets

Guo, Muxing; Cao, Lingyong; Peng, Xiangyang; Zhang, Jishan; Zhuang, Linzhong

doi:10.1007/s11595-016-1424-6

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…The value of R is expressed through the Lankford's coefficients in different directions. Several expressions are available in the literature [2,[27][28][29][30]. All of them can be represented as [30] The constitutive equations comprise Hooke's law, the yield criterion, and its associated flow rule.…”

Section: Statement Of the Problemmentioning

confidence: 99%

“…The difference between the expressions in [2,[27][28][29][30] is in the value of n. In Equations 7and 8, n is the number of directions in which the Lankford's coefficients and yield stresses are measured (including the radial and circumferential directions), R ∆αi is the Lankford's coefficient in the direction γ = ∆αi, σ s∆αi is the yield stress in tension in the direction γ = ∆αi, γ is the angle measured from the radial direction anticlockwise, and…”

Section: Statement Of the Problemmentioning

confidence: 99%

“…There are various expressions for calculating the parameters involved in transversely isotropic yield criteria [2,[27][28][29][30]. These expressions depend on the number of directions along which the yield stress is available.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the Replacement of the Actual Plastic Orthotropy with Various Approximations of Normal Anisotropy on Residual Stresses and Strains in a Thin Disk Subjected to External Pressure

et al. 2020

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Plastic anisotropy is very common to metallic materials. This property may significantly affect the performance of structures. However, the actual orthotropic yield criterion is often replaced with a criterion based on the assumption of normal anisotropy. The present paper aims to reveal the influence of this replacement on the distribution of strains and residual strains in a thin hollow disk under plane stress conditions. The boundary-value problem is intentionally formulated such that it is possible to obtain an exact semi-analytical solution without relaxing the boundary conditions. It is assumed that the disk is loaded by external pressure, followed by elastic unloading. The comparative analysis of the distributions of residual strains shows a significant deviation of the distribution resulting from the solutions based on the assumption of normal anisotropy from the distribution found using the actual orthotropic yield criterion. This finding shows that replacing the actual orthotropic yield criterion with the assumption of normal anisotropy may result in very inaccurate predictions. The type of anisotropy accepted is of practical importance because it usually results from such processes as drawing end extrusion with an axis of symmetry.

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