Multiscale Total Lagrangian Formulation for Modeling Dislocation-Induced Plastic Deformation in Polycrystalline Materials

2006 ◽  
Vol 4 (1) ◽  
pp. 29-46 ◽  
Author(s):  
Xinwei Zhang ◽  
Shafigh Mehraeen ◽  
Jiun-Shyan Chen ◽  
Nasr Ghoniem
Keyword(s):  
Plastic Deformation ◽  
Lagrangian Formulation ◽  
Polycrystalline Materials ◽  
Total Lagrangian Formulation

Stages of plastic deformation of polycrystalline materials

2017 ◽  
pp. 1-49 ◽  
Author(s):  
A. M. Glezer ◽  
E. V. Kozlov ◽  
N. A. Koneva ◽  
N. A. Popova ◽  
I. A. Kurzina
Keyword(s):  
Plastic Deformation ◽  
Polycrystalline Materials

Numerical Study of the Influence of Dislocation Microstructure on Metallic Materials Mechanical Behaviour

2006 ◽  
Vol 524-525 ◽  
pp. 511-516
Author(s):  
D. Gloaguen ◽  
Jamal Fajoui ◽  
Bruno Courant ◽  
Ronald Guillén
Keyword(s):  
Plastic Deformation ◽  
Mechanical Behaviour ◽  
Strain Path ◽  
Numerical Study ◽  
Mechanical Tests ◽  
Polycrystalline Materials ◽  
Metallic Materials ◽  
Mechanical Modelling ◽  
Elasto Plasticity ◽  
Strain Path Changes

A two-level homogenisation approach is applied to the micro-mechanical modelling of the elasto-plasticity of polycrystalline materials during various strain-path changes. The model is tested by simulating the development of intragranular strains during different complex loads. Mechanical tests measurements are used as a reference in order to validate the model. The anisotropy of plastic deformation in relation to the evolution of the dislocation structure is analysed. The results demonstrate the relevance of this approach for FCC polycrystals.

scholarly journals Estimation of Local Plastic Deformation in a Bulk of Polycrystalline Materials

2021 ◽  
Vol 9 ◽  
Author(s):  
Monika Vyskočová ◽  
◽  
Maroš Martinkovič ◽  
Martin Necpál ◽  
Maroš Vyskoč ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Model Simulation ◽  
Deformation Analysis ◽  
Polycrystalline Materials ◽  
Cold Forming ◽  
Local Plastic ◽  
Tensile Tester ◽  
The Difference ◽  
Deform Program ◽  
Local Plastic Deformation

The article deals with the local plastic deformation analysis after cold forming. The technology of drawing seamless steel tubes was used to obtain cold-formed samples. The tubes were manufactured by a Tinius Olsen 300ST tensile tester with a 6 ° and 12 ° die drawn without and with an inner mandrel. Based on orientation size recalculated by stereology and applying Monte Carlo method a mathematical conversion model was developed. Implemented model together with surface measurements and structure characteristics were used to get the orientation to the size of the deformation. Thus, the actual (logarithmic) deformations and local stresses were determined. Comparison of experimentally measured values of the actual local plastic deformation with the deformation calculated found on the model simulation in the Deform program defined the significance of the differences assessed by means of a statistical T-test. All differences in the values of the local plastic deformation with respect to the position were evaluated as statistically insignificant and therefore the difference between the experimental calculation and the simulation is random.

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