Upper-bound anisotropic yield locus calculations assuming 〈111〉-pencil glide
Roger W Logan,William F. Hosford +1 more
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In this paper, an upper-bound model which combines a least-shear analysis and Piehler's maximum virtual work analysis was proposed to determine axisymmetric deformation.About:
This article is published in International Journal of Mechanical Sciences.The article was published on 1980-01-01 and is currently open access. It has received 373 citations till now. The article focuses on the topics: Rotational symmetry & Yield (engineering).read more
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Hydroforming of anisotropic aluminum tubes: Part II analysis
TL;DR: In this article, the authors presented a simulation of free hydroforming of aluminum alloy tubes with axial feeding and showed that a shell element model was able to capture the majority of the structural features of the process very successfully.
Journal ArticleDOI
Advanced constitutive modeling of advanced high strength steel sheets for springback prediction after double stage U-draw bending
TL;DR: In this article, a U-shaped channel formed using a double drawing process (double stage U-draw bending) was proposed to reduce the amount of springback in the AHSS sheets.
Journal ArticleDOI
Anisotropic plasticity characterization of 6000- and 7000-series aluminum sheet alloys at various strain rates
TL;DR: In this paper, a comprehensive series of mechanical characterization tests were performed under uniaxial tension, simple shear and through-thickness compression at room temperature and various strain rates ranging from 10−3 to 103−s−1.
Journal ArticleDOI
Identification and validation of constitutive model and fracture criterion for AlMgSi alloy with application to sheet forming
Odd-Geir Lademo,Odd-Geir Lademo,O. Engler,S. Keller,Torodd Berstad,Torodd Berstad,Ketill Olav Pedersen,Ketill Olav Pedersen,Odd Sture Hopperstad +8 more
TL;DR: In this paper, a modeling strategy for computer-aided formability evaluation of sheet metals and sheet metal forming operations using shell element analysis is presented, which is characterized by a series of different tests, including uniaxial tension tests, shear tests and PCYS calculations.
Book ChapterDOI
Anisotropy of Sheet Metal
TL;DR: The Lankford parameter as mentioned in this paper is defined by uniaxial tensile tests on sheet specimens in the form of a strip, and the variation of their plastic behavior with direction is assessed by a quantity called Lankford parameters or anisotropy coefficient.
References
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XLVI. A theory of the plastic distortion of a polycrystalline aggregate under combined stresses.
J.F.W. Bishop,Rodney Hill +1 more
TL;DR: In this paper, a general relationship between stress and plastic strain in polycrystalline aggregate is derived for any metal in which individual crystals deform by slipping over preferred planes under a critical shear stress.
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CXXVIII. A theoretical derivation of the plastic properties of a polycrystalline face-centred metal
J.F.W. Bishop,Rodney Hill +1 more
TL;DR: In this paper, it was shown that the work-hardness of an isotropic aggregate of face-centred cubic crystals is a function only of the total plastic work if the grains hardened equally.
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Calculation of the taylor factor and lattice rotations for bcc metals deforming by pencil glide
J. M. Rosenberg,H. R. Piehler +1 more
TL;DR: In this article, the Taylor factor and the corresponding lattice rotations for tension or compression have been computed for grains of various orientations postulated to slip on arbitrary planes in 〈111〉 directions.
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The anomalous behaviour of aluminium sheet under balanced biaxial tension
John Woodthorpe,Roger Pearce +1 more
TL;DR: In this paper, the authors investigated the anomalous behavior of aluminium in uniaxial and biaxiaial tension and showed that anisotropic plasticity theory does not hold for all metals.
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