Effect of void in deformation and damage mechanism of single crystal Copper: A molecular dynamics study

2021 ◽  
Author(s):  
Ashutosh Rajput ◽  
Surajit Kumar Paul
Keyword(s):  
Molecular Dynamics ◽  
Single Crystal ◽  
Damage Mechanism ◽  
Single Crystal Copper

Deformation Mechanism of Diamond Nanocutting Single-Crystal Copper Using Molecular Dynamics Simulatio

2011 ◽  
Vol 239-242 ◽  
pp. 2775-2778
Author(s):  
Jia Xuan Chen ◽  
Ying Chun Liang ◽  
Xia Yu ◽  
Zhi Guo Wang ◽  
Zhen Tong
Keyword(s):  
Molecular Dynamics ◽  
Single Crystal ◽  
Cutting Force ◽  
Dislocation Loop ◽  
Deformation Mechanism ◽  
Molecular Dynamics Method ◽  
Parameter Method ◽  
Removal Mechanism ◽  
Single Crystal Copper ◽  
Dynamics Method

To study the removal mechanism of materials during nano cutting, molecular dynamics method is adopted to simulate single crystal copper nanomachining processes, and subsurface defects evolvements and chip forming regulation are analyzed by revised centro-symmetry parameter method and the ratios of the tangential cutting forceand the normal cutting force. The results show that there are different defects under different cutting depths. When cutting depths is shallower, there are dislocation loop nucleation in the subsurface of the workpiece beneath the tool; however, when the cutting depths is deeper, there are dislocations nucleation and slipping along {101} plane and (111) plane. In addition, both tangential cutting forceand the normal cutting force decrease as the cutting depths decreasing. When the ratios of the normal cutting force and the tangential cutting force is below 0.9, the chip will be formed.

Quasicontinuum Simulation of Uniaxial Tension of Single Crystal Copper Nanowire

2011 ◽  
Vol 694 ◽  
pp. 200-204
Author(s):  
Xing Lei Hu ◽  
Ying Chun Liang ◽  
Jia Xuan Chen ◽  
Hong Min Pen
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Molecular Dynamics ◽  
Finite Element ◽  
Single Crystal ◽  
Size Effects ◽  
Tension Test ◽  
Quasicontinuum Method ◽  
Single Crystal Copper ◽  
Copper Nanowire

Quasicontinuum simulations of tension test of single crystal copper nanowire are performed to analyze deformation mechanism of tension process and size effects of mechanical properties. New tension models of nanowire are constructed by using quasicontinuum method, which has combined molecular dynamics and finite element method. Tension processes of three different length nanowires without notches and those with notches are simulated. Yield strength and elastic modulus are calculated according to the obtained load-displacement curves. Finally, the results show that the mechanical properties of copper nanowire have obvious size effect and the notches have obvious influence on the mechanical properties.

scholarly journals Single-crystal copper nanorods under uniaxial tensile load with different period by molecular dynamics

2017 ◽  
Vol 7 ◽  
pp. 2736-2741 ◽  
Author(s):  
Zailin Yang ◽  
Yu Zhang ◽  
Guowei Zhang ◽  
Yong Yang ◽  
Xizhi Wang
Keyword(s):  
Molecular Dynamics ◽  
Single Crystal ◽  
Tensile Load ◽  
Uniaxial Tensile ◽  
Single Crystal Copper ◽  
Copper Nanorods

Multiaxial behavior of nanoporous single crystal copper: a molecular dynamics study

2009 ◽  
Vol 22 (6) ◽  
pp. 650-656 ◽  
Author(s):  
Kejie Zhao ◽  
Liangliang Fan ◽  
Changqing Chen
Keyword(s):  
Molecular Dynamics ◽  
Single Crystal ◽  
Single Crystal Copper

scholarly journals Molecular dynamics simulation of void growth in single crystal copper under uniaxial impacting

2005 ◽  
Vol 54 (6) ◽  
pp. 2791
Author(s):  
Luo Jin ◽  
Zhu Wen-Jun ◽  
Lin Li-Bin ◽  
He Hong-Liang ◽  
Jing Fu-Qian
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Single Crystal ◽  
Void Growth ◽  
Dynamics Simulation ◽  
Single Crystal Copper

Mechanical properties of single crystal copper ellipsoidal nanoshells by molecular dynamics

2018 ◽  
Vol 32 (16) ◽  
pp. 1850196 ◽  
Author(s):  
Qinyou Yang ◽  
Zailin Yang ◽  
Yong Yang ◽  
Guowei Zhang ◽  
Yu Zhang
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Single Crystal ◽  
Normal Stress ◽  
Variable Thickness ◽  
Normal Stresses ◽  
Uniform Thickness ◽  
Single Crystal Copper ◽  
Dynamics Method ◽  
Elastic Stage

Single crystal copper ellipsoidal nanoshells under outer normal tensile loadings are investigated by the molecular dynamics method. Normal stress and Mises stress are introduced to describe the mechanical properties. The uniform thickness nanoshells, the variable thickness nanoshells and the variable radius nanoshells are simulated to elucidate the effect of thickness on yielding behaviors and other mechanical properties. Potential energies, stresses and dislocations of nanoshells are discussed in the paper. The dislocations of these nanoshells form an octagon or that with an external quadrangle. The variable thickness nanoshells break this shape slightly. The potential energies of nanoshells have stable stages and then increase. The outer normal stresses and Mises stresses of different models differ from eath other. The thickness of nanoshells affects the elastic stage and the variable thickness nanoshell has different mechanical properties with others. When the radiuses of nanoshells with the same thickness are different, their dislocation shapes are the pressed octagon. Thier normal yield stresses are different, but their Mises yield stress are same. Also, the outer shape determines the trend of curves. The structure of a sphere is steadier than that of an ellipsoid.

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