Nonlinear crack mechanics

1994 ◽  
Vol 30 (11) ◽  
pp. 827-833 ◽  
Author(s):  
L. P. Khoroshun
Keyword(s):  
Crack Mechanics ◽  
Nonlinear Crack

Application of nonlinear crack mechanics to V-shaped notch strength evaluation

2019 ◽  
Vol 2019 (0) ◽  
pp. OS0104
Author(s):  
Kazuhiro ODA ◽  
Harutaka INOUE ◽  
Masafumi YAMAMOTO ◽  
Noriko TSUTSUMI
Keyword(s):  
Strength Evaluation ◽  
Crack Mechanics ◽  
Nonlinear Crack ◽  
Notch Strength

scholarly journals Nonlinear Crack Growth Monitoring

2000 ◽  
Author(s):  
Donald E. Welch ◽  
Lee M. Hively ◽  
Ray F. Holdaway
Keyword(s):  
Crack Propagation ◽  
End Of Life ◽  
Crack Growth ◽  
National Laboratory ◽  
Growth Monitoring ◽  
High Quality ◽  
Oak Ridge ◽  
The Past ◽  
Fiberglass Composite ◽  
Nonlinear Crack

Abstract Structures subject to crack growth spend 90–95% of their lifetime in nucleation of very tiny flaws into measurable crack sizes. Due to the large variation in initial flaw sizes and the mathematics of flaw growth, the fatigue lifetimes, even of high-quality structures, can vary by a factor of as much as 10 to 20 even in a small fleet. This large variation in fatigue lifetimes leads to conservative statistics, which often prompts the premature retirement or overhaul of structures, since they focus on the weakest members of the fleet, while the remainder of the fleet is sound. In the past two years, Oak Ridge National Laboratory (ORNL) has developed a new Griffith energy-based technique that can provide useful warning of the impending failure of a structure due to end-of-life crack propagation. This technique has been demonstrated by test and analysis in fiberglass composite for tension-tension fatigue.

Nonlinear crack opening integral: Mode mixity for finite cracks

2017 ◽  
Vol 186 ◽  
pp. 283-299 ◽  
Author(s):  
A. Talmon l’Armée ◽  
S. Hell ◽  
P.L. Rosendahl ◽  
J. Felger ◽  
W. Becker
Keyword(s):  
Crack Opening ◽  
Mode Mixity ◽  
Nonlinear Crack

Study of influence of various loading parameters on crack propagation by using Cohesive Zone Modeling (CZM) approach

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Riaz Ahmed ◽  
Md. Arifuzzaman
Keyword(s):  
Crack Propagation ◽  
Cohesive Zone ◽  
Cohesive Zone Modeling ◽  
Dynamic Crack Propagation ◽  
Dynamic Crack ◽  
Simulation Code ◽  
Static Mode ◽  
Mass Scaling ◽  
Zone Modeling ◽  
Nonlinear Crack

AbstractCohesive Zone Modeling (CZM) is one of the most promising tools to investigate nonlinear crack propagation in present time. In this study, CZM approach is used to investigate the influence of various type of loading parameters in nonlinear crack propagation. These parameters include loading velocity, mass scaling, maximum strength of cohesive element and displacement jump. For this investigation, we used DYNA3D as a dynamic crack simulation code. Simulation outcomes were compared with the experimental results, where an experimental observation for Arcan test Mode I case was made in MTS machine. Note that, the experiment was performed in quasi-static mode. As DYNA3D is used to simulate dynamic crack propagation, this comparison reflects the deviation of crack parameters for quasi-static and dynamic crack propagation. Finally we checked, whether DYNA3D can be used for quasi-static crack propagation or not.

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