Plastic Deformation Development in Polycrystals Based on the Cellular Automata and Relaxation Element Method

2004 ◽  
pp. 375-384 ◽  
Author(s):  
G. V. Lasko ◽  
Y. Y. Deryugin ◽  
S. Schmauder
Keyword(s):  
Plastic Deformation ◽  
Cellular Automata ◽  
Element Method

Computation on continuous grain refinement in AA1050 aluminum during repetitive tube expansion and shrinking technique

2015 ◽  
Vol 232 (4) ◽  
pp. 307-318
Author(s):  
H Jafarzadeh ◽  
K Abrinia
Keyword(s):  
Finite Element Method ◽  
Plastic Deformation ◽  
Grain Size ◽  
Finite Element ◽  
Dislocation Density ◽  
Severe Plastic Deformation ◽  
Grain Refinement ◽  
Half Cycle ◽  
Tube Expansion ◽  
Element Method

The microstructure evolution during recently developed severe plastic deformation method named repetitive tube expansion and shrinking of commercially pure AA1050 aluminum tubes has been studied in this paper. The behavior of the material under repetitive tube expansion and shrinking including grain size and dislocation density was simulated using the finite element method. The continuous dynamic recrystallization of AA1050 during severe plastic deformation was considered as the main grain refinement mechanism in micromechanical constitutive model. Also, the flow stress of material in macroscopic scale is related to microstructure quantities. This is in contrast to the previous approaches in finite element method simulations of severe plastic deformation methods where the microstructure parameters such as grain size were not considered at all. The grain size and dislocation density data were obtained during the simulation of the first and second half-cycles of repetitive tube expansion and shrinking, and good agreement with experimental data was observed. The finite element method simulated grain refinement behavior is consistent with the experimentally obtained results, where the rapid decrease of the grain size occurred during the first half-cycle and slowed down from the second half-cycle onwards. Calculations indicated a uniform distribution of grain size and dislocation density along the tube length but a non-uniform distribution along the tube thickness. The distribution characteristics of grain size, dislocation density, hardness, and effective plastic strain were consistent with each other.

Effect of plastic deformation on hydraulic fracturing with extended element method

2018 ◽  
Vol 14 (6) ◽  
pp. 2083-2101 ◽  
Author(s):  
Qingdong Zeng ◽  
Jun Yao ◽  
Jianfu Shao
Keyword(s):  
Plastic Deformation ◽  
Hydraulic Fracturing ◽  
Extended Element ◽  
Element Method

Axisymmetric plastic deformation using finite element method

1974 ◽  
Vol 1 (5-6) ◽  
pp. 315-320 ◽  
Author(s):  
W. Klie ◽  
M. Lung ◽  
O. Mahrenholtz
Keyword(s):  
Finite Element Method ◽  
Plastic Deformation ◽  
Finite Element ◽  
Axisymmetric Plastic ◽  
Element Method
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