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http://hdl.handle.net/11375/21827
Title: | Predicting the constitutive behavior of semi-solids via a direct finite element simulation: application to AA5182 |
Authors: | Phillion, A.B. Cockcroft, S.L. Lee, P.D. |
Department: | Materials Science and Engineering |
Keywords: | Modeling;Deformation;Constitutive behavior;Semisolid;Empirical relationship;Microstructure |
Publication Date: | 26-Jun-2009 |
Publisher: | IOP Publishing Ltd. |
Citation: | Phillion, A. B., S. L. Cockcroft, and P. D. Lee. "Predicting the constitutive behavior of semi-solids via a direct finite element simulation: application to AA5182." Modelling and Simulation in Materials science and Engineering 17.5 (2009): 055011. |
Abstract: | The methodology of direct finite element simulation was used to predict the semi-solid constitutive behavior of an industrially important aluminum-magnesium alloy, AA5182. Model microstructures were generated that detail key features of the as-cast semi-solid: equiaxed-globular grains of random size and shape, interconnected liquid films, and pores at the triple-junctions. Based on the results of over fifty different simulations, a model-based constitutive relationship which includes the effects of the key microstructure features – fraction solid, grain size, and fraction porosity – was derived using regression analysis. This novel constitutive equation was then validated via comparison to both the finite element simulations and experimental stress/strain data. Such an equation can now be used to incorporate the effects of microstructure on the bulk semi-solid flow stress within a macro scale process model. |
URI: | http://hdl.handle.net/11375/21827 |
Identifier: | 10.1088/0965-0393/17/5/055011 |
Appears in Collections: | Materials Science and Engineering Publications |
Files in This Item:
File | Description | Size | Format | |
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2009_MSMS_Phillion_etal..pdf | 831.83 kB | Adobe PDF | View/Open |
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