Interface crack propagation between epoxy moulding compound and copper

2016 ◽  
Author(s):  
Weihai Zhang ◽  
Daoguo Yang ◽  
Leo Ernst ◽  
Bingbing Zhang ◽  
Wen Yang ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Interface Crack ◽  
Moulding Compound

Peri-Ultrasound Modeling of Dynamic Response of an Interface Crack Showing Wave Scattering and Crack Propagation

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Mohammad Hadi Hafezi ◽  
Tribikram Kundu
Keyword(s):  
Crack Propagation ◽  
Interface Crack ◽  
Pure Shear ◽  
Structural Response ◽  
Shear Loading ◽  
Modeling Tools ◽  
Modeling Tool ◽  
Numerical Predictions ◽  
The Waves ◽  
Cracked Structure

A cracked structure made of two different elastic materials having a Griffith crack at the interface is analyzed when it is subjected to pure shear loading and ultrasonic loading. The waves generated by the applied load and the crack propagation resulted from the shear loading are investigated. Peri-ultrasound modeling tool is used for this analysis. A comparison between experimental results and numerical predictions shows a very good matching between the two. Furthermore, the increase in nonlinear ultrasonic response in presence of the interface crack could also be modeled by this technique. The computed results show that when the interface crack propagates, then it breaks the interface at one end of the crack and breaks the material with lower elastic modulus at the other end. The unique feature of this peridynamics-based modeling tool is that it gives a complete picture of the structural response when it is loaded—it shows how elastic waves propagate in the structure and are scattered by the crack, how the crack surfaces open up, and then how crack starts to propagate. Different modeling tools are not needed to model these various phenomena.

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