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Modeling heterogeneous intragrain deformations using finite element formulations

Computational Methods for Microstructure-Property Relationships, Page: 363-392
2011
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Book Chapter Description

Polycrystalline materials exhibit deformation patterns that are heterogeneous both between and within crystals. The deformation heterogeneity within crystals can arise from variations of the crystallographic slip due to spatial variations in the stress driven by interactions among neighboring crystals. Typically, misorientations develop across crystals if the slip is not homogeneous. Furthermore, dislocations may accumulate within crystals, causing lattice distortion (elastic straining) and contributing to the stress. In this chapter, we summarize basic and extended crystal elastoplasticity formulations to address these effects. Finite element methodologies for both formulations are presented and examples of their use are discussed. © 2011 Springer Science+Business Media, LLC.

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