scholarly journals Study on the irradiation effect of mechanical properties of RPV steels using crystal plasticity model

2019 ◽  
Vol 51 (2) ◽  
pp. 501-509 ◽  
Author(s):  
Junfeng Nie ◽  
Yunpeng Liu ◽  
Qihao Xie ◽  
Zhanli Liu
Keyword(s):  
Mechanical Properties ◽  
Crystal Plasticity ◽  
Irradiation Effect ◽  
Plasticity Model ◽  
Crystal Plasticity Model

scholarly journals A Crystal Plasticity Model with Irradiation Effect for the Mechanical Behavior of FCC Metals

2019 ◽  
Vol 32 (6) ◽  
pp. 675-687
Author(s):  
Junfeng Nie ◽  
Yunpeng Liu ◽  
Pandong Lin ◽  
Qihao Xie ◽  
Zhanli Liu
Keyword(s):  
Constitutive Model ◽  
Mechanical Behavior ◽  
Crystal Plasticity ◽  
Pure Copper ◽  
Irradiation Effect ◽  
Polycrystalline Copper ◽  
Plasticity Model ◽  
Crystal Plasticity Model ◽  
Simulation Results ◽  
Edge Dislocations

Abstract In this paper, a crystal plasticity model considering the irradiation effect based on the thermal activation theory is established. The evolutions of screw dislocations, edge dislocations, and stacking fault tetrahedrals (SFTs) (induced by irradiation) are included into the model. The interactions between dislocations and irradiation-induced SFTs are also considered. The constitutive model is numerically implemented on the ABAQUS platform through UMAT subroutine and applied to study the irradiation effect on the mechanical behavior of pure copper. The mechanical properties of single and polycrystalline copper are studied, and the simulation results show that the constitutive model can properly predict the mechanical behavior of irradiated pure copper. Especially for polycrystalline copper, the simulation results are in good agreement with the experimental data.

Multi-level direct crystal plasticity model of polycrystalline specimen: Grains generation

2021 ◽  
Author(s):  
Artyom A. Tokarev ◽  
Anton Yu. Yants ◽  
Alexey I. Shveykin ◽  
Nikita S. Kondratiev
Keyword(s):  
Crystal Plasticity ◽  
Plasticity Model ◽  
Polycrystalline Specimen ◽  
Crystal Plasticity Model ◽  
Multi Level

Crystal Plasticity Predictions of Forward-Reverse Simple Shear Flow Stress

2011 ◽  
Vol 702-703 ◽  
pp. 204-207 ◽  
Author(s):  
Young Ung Jeong ◽  
Frédéric Barlat ◽  
Myoung Gyu Lee
Keyword(s):  
Flow Stress ◽  
Crystal Plasticity ◽  
Simple Shear ◽  
Bauschinger Effect ◽  
Texture Evolution ◽  
Simple Shear Flow ◽  
Plasticity Model ◽  
Lower Yield Stress ◽  
Crystal Plasticity Model ◽  
Stress Reversals

The flow stress behavior of a bake-hardenable steel during a few simple shear cycles is investigated using a crystal plasticity model. The simple shear test provides a stable way to reverse the loading direction. Stress reversals were accompanied with a lower yield stress, i.e., the Bauschinger effect, followed by a transient hardening stage with a plateau region and, permanent softening. The origins of these three distinct stages are discussed using a crystal plasticity model. To this end, the representative discrete grain set is tuned to capture such behavior by coupling slip system hardening appropriately. The simulated results are compared with experimental forward-reverse simple shear stress-strain curves. It is shown that the characteristic flow stress stages are linked to texture evolution and to the Bauschinger effect acting on the different slip systems.

scholarly journals Crystal Plasticity Model of Reactor Pressure Vessel Embrittlement in GRIZZLY

2015 ◽  
Author(s):  
Pritam Chakraborty ◽  
Suleyman Bulent Biner ◽  
Yongfeng Zhang ◽  
Benjamin Whiting Spencer
Keyword(s):  
Crystal Plasticity ◽  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Plasticity Model ◽  
Crystal Plasticity Model ◽  
Reactor Pressure
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