Molecular Dynamics Simulation on Crack Initiation at Bi-Material Interface Edges

2007 ◽  
pp. 949-954
Author(s):  
Fu Lin Shang ◽  
Takayuki Kitamura
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Crack Initiation ◽  
Dynamics Simulation ◽  
Material Interface

Molecular Dynamics Simulation on Crack Initiation at Bi-Material Interface Edges

2007 ◽  
Vol 340-341 ◽  
pp. 949-954 ◽  
Author(s):  
Fu Lin Shang ◽  
Takayuki Kitamura
Keyword(s):  
Molecular Dynamics ◽  
Crack Initiation ◽  
Simulation Models ◽  
Md Simulations ◽  
Dynamics Simulation ◽  
Ideal Strength ◽  
Material Interfaces ◽  
Material Interface ◽  
Maximum Stresses ◽  
Onset Of Fracture

Molecular dynamics (MD) simulations are performed to study the onset of fracture at the free edges of bi-material interfaces. The objective is to see whether a unified criterion could be formulated for crack initiation at interface edges with different angles or not. The simulations are facilitated with model bi-material systems interacting with Morse pair potentials. Three simulation models are considered, i.e. the interface edges with angles 45°, 90° and 135°, respectively. The simulation results show that, at the instant of crack initiation, the maximum stresses along the interfaces reach the ideal strength of the interface; also, the interface energies just decrease to below the value of the intrinsic cohesive energy of the interface. These findings revealed that the onset of fracture at the interface edges with different geometries could be controlled by the maximum stresses or the cohesive interfacial energy.

scholarly journals Renormalized Molecular Dynamics Simulation of Crack Initiation Process in Machining Defectless Monocrystal Silicon.

1997 ◽  
Vol 63 (1) ◽  
pp. 86-90
Author(s):  
Toyoshiro INAMURA ◽  
Nobuhiro TAKEZAWA ◽  
Shiro SHAMOTO ◽  
Naohisa NAKAHAR ◽  
Shoichi SHIMADA ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Crack Initiation ◽  
Dynamics Simulation ◽  
Initiation Process

Interface Fracture Criterion Based on Molecular Dynamics Simulation

2011 ◽  
Vol 142 ◽  
pp. 184-187
Author(s):  
Zhen Yang
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Crack Initiation ◽  
Fracture Criterion ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Simplified Model ◽  
Interface Fracture ◽  
Coating Materials ◽  
The Relationship

Fracture of coating materials often occurs at or near the interface, while the mechanism and criterion of interface fracture are not clear yet. A molecular dynamics simulation method was introduced to simulate the interface crack initiation, and the relationship between the interface stress and the interface fracture was found. Although a simplified model was applied, the results still showed some intrinsic features that are useful to study the process of interface fracture. At last, an interface fracture criterion was proposed.

Sign in / Sign up

Export Citation Format

Share Document