Crack branch in piezoelectric bimaterial system

2000 ◽  
Vol 38 (6) ◽  
pp. 673-693 ◽  
Author(s):  
Qing-Hua Qin ◽  
Yiu-Wing Mai
Keyword(s):  
Piezoelectric Bimaterial ◽  
Bimaterial System

scholarly journals Interaction of Screw Dislocation with Edge Interfacial Crack on Fine-Grained Piezoelectric Coating/Substrate

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Shuaishuai Hu ◽  
Jiansheng Liu ◽  
Junlin Li ◽  
Xiufeng Xie
Keyword(s):  
Screw Dislocation ◽  
Interfacial Crack ◽  
Mapping Function ◽  
Image Force ◽  
Infinite Plane ◽  
Principle Of Superposition ◽  
Fine Grained ◽  
Substrate Structure ◽  
Piezoelectric Bimaterial ◽  
The Right

The interaction between micro- and macrocracks in a fine-grained piezoelectric coating/substrate under remote antiplane mechanical and in-plane electrical loadings was studied. The principle of superposition and a mapping function method was used to transform the fine-grained coating/substrate structure containing the screw dislocation and the edge interfacial crack into the right semi-infinite plane piezoelectric bimaterial with screw dislocation to simplify the problem. Furthermore, the electric field, displacement field, intensity factors, and image force of these two problems were established. In addition, numerical calculations were then given graphically to study the effects of the elastic modulus of the material, the size of the crack, the thickness of the coating, and the screw dislocation angle on the edge interface crack and dislocation.

scholarly journals On the Reference Length and Mode Mixity for a Bimaterial Interface

2007 ◽  
Vol 129 (4) ◽  
pp. 580-587 ◽  
Author(s):  
A. Agrawal ◽  
A. M. Karlsson
Keyword(s):  
Interfacial Fracture ◽  
Bimaterial Interface ◽  
Mode Mixity ◽  
Characteristic Mode ◽  
Linear Elastic ◽  
System A ◽  
Reference Length ◽  
Point Bend ◽  
Arbitrary Location ◽  
Bimaterial System

We investigate properties that govern interfacial fracture within the framework of linear elastic fracture mechanics, including interfacial fracture toughness, mode mixity, and the associated reference length. The reference length describes the arbitrary location where the mode mixity is evaluated, ahead of the crack tip, in a bimaterial system. A method for establishing a reference length that is fixed for a given bimaterial system is proposed. This is referred to as the “characteristic reference length,” with the associated “characteristic mode mixity.” The proposed method is illustrated with an experimental investigation, utilizing a four-point bend test of a bimaterial system.

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