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The role of texture evolution and strain hardening on the anisotropic response of polycrystalline metals
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Text
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Title
The role of texture evolution and strain hardening on the anisotropic response of polycrystalline metals
SubTitle
PartName
PartNumber
NonSort
Identifier
ETD_2177
Identifier
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052003
Language
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eng
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theses
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Topic
Mechanical and Aerospace Engineering
Subject
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(authority = ETD-LCSH)
Topic
Aniostropy
Subject
(ID = SBJ-3);
(authority = ETD-LCSH)
Topic
Polycrystals
Abstract
Anisotropy and texture plays an important role in deformation of Aluminum alloy sheets. The development of anisotropy during metal forming is a key factor as in the standard industrial use of AA-6022 as stamped automotive body enclosures where a close estimation of anisotropy can deduct costs on both machinery and inventory. In this thesis, we provide a methodology to predict the anisotropic behavior of polycrystalline metals depending on its processing history. The methodology suggested is based on single crystal plasticity model of Cuitino and Ortiz where the mechanics of dislocation motion through forest dislocations is estimated statistically. In that context, we first study the role of uncertainties and responses of the initial parameters such as initial yield stress and dislocation density. R-values, which is a measure of anisotropy, of a sample undergone hydraulic bulge test are obtained by a uniaxial tensile test simulation and found to be in good agreement with the experimental
findings. An optimization method to capture the texture while reducing the number of orientations is introduced and compared with random sets of orientations. Gradual work hardening effect is captured by adjusting the dislocation density carried over through consecutive simulations of rolling and uniaxial stretching. However more accurate models of rolling simulations is necessary to provide r-values and work hardening effect without the need of texture.
findings. An optimization method to capture the texture while reducing the number of orientations is introduced and compared with random sets of orientations. Gradual work hardening effect is captured by adjusting the dislocation density carried over through consecutive simulations of rolling and uniaxial stretching. However more accurate models of rolling simulations is necessary to provide r-values and work hardening effect without the need of texture.
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electronic resource
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ix, 64, 5 p. : ill.
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M.S.
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Includes bibliographical references (p. 2-5)
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by E. Alisar Tuncer
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Tuncer
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E. Alisar (Ergin Alisar)
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1978-
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E. Alisar (Ergin Alisar) Tuncer
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Cuitino
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Alberto
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chair
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Alberto M Cuitino
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Weng
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George
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internal member
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George J Weng
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Pelegri
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Assimina
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Advisory Committee
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Assimina A Pelegri
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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2009
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2009-10
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xx
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NjNbRU
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Rutgers University Electronic Theses and Dissertations
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ETD
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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doi:10.7282/T3W0964V
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ETD graduate
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The author owns the copyright to this work.
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Copyright protected
Notice
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Open
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Permission or license
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Tuncer
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Ergin
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Ergin Tuncer
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Rutgers University. Graduate School - New Brunswick
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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