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A reduced-order crystal model for HCP metals: Application to Mg
- Source :
- Mechanics of Materials. 98:98-110
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- A computationally efficient plasticity model for HCP crystals is developed for use in simulations where the constitutive model evaluations account for a significant fraction of the total analysis time. Combined pyramidal and prismatic slip is represented as an isotropic function while slip along the basal plane and extension twinning are maintained as distinct mechanisms. Additional efficiency is gained by deferring the updates of the rate-independent twinning and basal system strengths until the following time step, which allows precomputation of the inverses of the slip interaction matrices. Comparisons are made with single crystal pure Mg experimental data, as well as rolled polycrystal AZ31B data. The computational efficiency is evaluated by comparing simulation times from the current model with J2-Flow theory plasticity and a full crystal plasticity model. The reduced crystal plasticity model retains essential crystallographic features that govern macroscale mechanical response of HCP metals at approximately five times the computational expense of a J2-Flow theory calculation.
- Subjects :
- 010302 applied physics
Materials science
business.industry
Isotropy
Constitutive equation
Thermodynamics
02 engineering and technology
Slip (materials science)
Structural engineering
Plasticity
021001 nanoscience & nanotechnology
01 natural sciences
Mechanics of Materials
Crystal model
Precomputation
0103 physical sciences
General Materials Science
0210 nano-technology
business
Crystal twinning
Instrumentation
Single crystal
Subjects
Details
- ISSN :
- 01676636
- Volume :
- 98
- Database :
- OpenAIRE
- Journal :
- Mechanics of Materials
- Accession number :
- edsair.doi...........b701735ac7229ed96d840700e07f8919