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

scholarly journals Pressure Dependence of Structural and Mechanical Properties of Single-Crystal Tungsten: A Molecular Dynamics Study

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1898
Author(s):  
Xuepeng Liu ◽  
Kezhong Xu ◽  
Hua Zhai
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
High Pressure ◽  
Single Crystal ◽  
Pressure Dependence ◽  
High Pressures ◽  
External Pressure ◽  
Uniaxial Tensile ◽  
Linear Lattice ◽  
Lattice Contraction

In the current study, molecular dynamics (MD) simulations were performed to study the pressure dependence of the structural and mechanical properties of single-crystal tungsten. The results show that single-crystal tungsten possesses noteworthy high-pressure stability and exhibits linear lattice contraction with increasing external pressure. Consistent with the results of the performed experiments, the predicted elastic moduli, including Young’s modulus, shear modulus, and bulk modulus, as well as Poisson’s ratio and Pugh’s modulus ratio, show a clear increasing trend with the increase in pressure. Under uniaxial tensile loading, the single-crystal tungsten at high pressures experiences a phase transition from BCC to FCC and other disordered structures, which results in a stripe-like morphology in the tungsten crystal. These results are expected to deepen our understanding of the high-pressure structural and mechanical behaviors of tungsten materials.

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.

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
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