The Role of Geometry and Crack Growth on Constraint and Implications for Ductile/Brittle Fracture

2009 ◽  
pp. 134-134-26 ◽  
Author(s):  
NP O'Dowd ◽  
CF Shih ◽  
RH Dodds
Keyword(s):  
Brittle Fracture ◽  
Crack Growth

scholarly journals Unique Slow Crack Growth Behavior of Isotactic Polypropylene: The Role of Shear Layer-Spherulites Layer Alternated Structure

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2746
Author(s):  
Mingjin Liu ◽  
Jiaxu Luo ◽  
Jin Chen ◽  
Xueqin Gao ◽  
Qiang Fu ◽  
...  
Keyword(s):  
Shear Layer ◽  
Crack Growth ◽  
Isotactic Polypropylene ◽  
Slow Crack Growth ◽  
Crack Growth Behavior ◽  
Polymer Science ◽  
The Past ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

With the development of polymer science, more attention is being paid to the longevity of polymer products. Slow crack growth (SCG), one of the most important factors that reveal the service life of the products, has been investigated widely in the past decades. Here, we manufactured an isotactic polypropylene (iPP) sample with a novel shear layer–spherulites layer alternated structure using multiflow vibration injection molding (MFVIM). However, the effect of the alternated structure on the SCG behavior has never been reported before. Surprisingly, the results showed that the resistivity of polymer to SCG can be enhanced remarkably due to the special alternated structure. Moreover, this sample shows unique slow crack propagation behavior in contrast to the sample with the same thickness of shear layer, presenting multiple microcracks in the spherulites layer, which can explain the reason of the resistivity improvement of polymer to SCG.

The Role of Sub-Boundaries in the Brittle Fracture of Polycrystalline Materials

2008 ◽  
pp. 821-822 ◽  
Author(s):  
Gareth Hughes ◽  
Peter Flewitt ◽  
Fabio Sorbello ◽  
Gillian Smith ◽  
Alan Crocker
Keyword(s):  
Brittle Fracture ◽  
Polycrystalline Materials

scholarly journals The Role of Crack Growth in Metal Fatigue

1988 ◽  
Vol 110 (1) ◽  
pp. 110-111
Author(s):  
L. P. Pook ◽  
H. Saunders
Keyword(s):  
Crack Growth ◽  
Metal Fatigue
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