Three-dimensional crystal plasticity simulations using peridynamics theory and experimental comparison

A three-dimensional (3D) peridynamics (PD) model of crystal plasticity (CP) is presented for predicting the fine-scale localization in polycrystalline microstructures undergoing elastoplastic deformation. Microscale data from electron microscopy and digital image correlation have indicated that slip...

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Bibliographic Details
Published in:International journal of plasticity 2021-07, Vol.142 (C), p.102991, Article 102991
Main Authors: Lakshmanan, Aaditya, Luo, Jiangyi, Javaheri, Iman, Sundararaghavan, Veera
Format: Article
Language:English
Subjects:
Continuum mechanics
Crystal plasticity
Crystals
Digital imaging
Elastoplasticity
Finite element method
Localization
Magnesium base alloys
Meshless methods
Peridynamics
Plastic deformation
Plastic properties
Polycrystalline microstructure
Polycrystals
Simulation
Strain localization
Three dimensional models
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Summary:A three-dimensional (3D) peridynamics (PD) model of crystal plasticity (CP) is presented for predicting the fine-scale localization in polycrystalline microstructures undergoing elastoplastic deformation. Microscale data from electron microscopy and digital image correlation have indicated that slip localizations arise early in deformation and act as precursors to mechanical failure and fracture. However, classical numerical approaches such as crystal plasticity finite element methods (CPFEM) are generally unable to predict the emergence and distribution of such localizations. Alternatively, the PD formulation has attracted significant attention for its unique treatment of deformation in the presence of high strain gradient fields. In this paper, a mesh-free non-ordinary state-based PD technique is developed for simulating the elasto-plastic deformation of 3D polycrystalline aggregates of a magnesium alloy. This work presents the details of 3D polycrystal plasticity modeling using PD theory with experimental and CPFEM comparisons. The results from this model are validated against published experimental data for the stress-strain response and texture evolution. The crystal plasticity peridynamic (CPPD) models are successful in simulating grain averaged strains seen in the experiment and depict well-resolved regions of strain localization.
ISSN:0749-6419
1879-2154
DOI:10.1016/j.ijplas.2021.102991