Fatigue crack growth of butt welded joints subjected to mixed mode loading and overloading

2021 ◽  
Vol 241 ◽  
pp. 107376
Author(s):  
Iman Shakeri ◽  
Amir Reza Shahani ◽  
Calvin David Rans
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Welded Joints ◽  
Mixed Mode ◽  
Mixed Mode Loading

Numerical Simulation of Fatigue Crack Growth for Curved Cracks Emanating from Fastener Holes in Sheets by the MVCCI Method

2006 ◽  
Vol 324-325 ◽  
pp. 863-866
Author(s):  
Holger Theilig ◽  
M. Goth ◽  
Michael Wünsche
Keyword(s):  
Numerical Simulation ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Plane Stress ◽  
Mixed Mode ◽  
Mixed Mode Loading ◽  
Multiple Crack ◽  
2D Structure ◽  
Predictor Corrector

The paper presents the results of a continued study of curved fatigue crack growth in a multiple arbitrarily pre-cracked isotropic sheet under plane stress loading. The predictor-corrector method (PCM) was extended in order to analyse the growth of multiple crack systems in a finite 2D structure. Together with the recently proposed improved modified virtual crack closure integral (MVCCI) method we can obtain accurate SIF values also for interacting cracks, and furthermore we can simulate fatigue crack growth of multiple crack systems in plane sheets under proportional mixed mode loading conditions. As a result, the program PCCS-2D is written to run within ANSYS to simulate interacting curved cracks. In order to check the accuracy and efficiency of the proposed method several example problems are solved. Especially curved cracks emanating from loaded fastener holes in sheets are analysed.

scholarly journals History effect in fatigue crack growth under mixed-mode loading conditions

2009 ◽  
Vol 31 (11-12) ◽  
pp. 1733-1741 ◽  
Author(s):  
P.Y. Decreuse ◽  
S. Pommier ◽  
L. Gentot ◽  
S. Pattofatto
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Mixed Mode ◽  
Loading Conditions ◽  
Mixed Mode Loading ◽  
History Effect

Effect of a Graded Layer on the Dissipated Energy During Fatigue Crack Growth on Plastically Mismatched Interfaces Under Mixed-Mode Loading

2009 ◽  
Author(s):  
Craig M. Baudendistel ◽  
Nathan W. Klingbeil
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Mixed Mode ◽  
Dissipated Energy ◽  
Bimaterial Interface ◽  
Finite Element Models ◽  
Mixed Mode Loading ◽  
Plastic Properties ◽  
Plastic Dissipation

Recent work has proposed a dissipated energy theory of fatigue crack growth under mode I loading for homogenous materials and has since been extended to a bimaterial interface geometry under mixed-mode loading. An inherent assumption of this prior work is that a perfect crack exists along the interface joining the top and bottom layers. The current work extends the approach of previous studies to incorporate a grading of plastic properties between the two layers. The plastic dissipation is extracted from 2D parametric finite element models with ABAQUS. Results have shown that incorporation of a graded layer increass the overall amount of plastic dissipation between modes I and II, but is still bounded by the two cases where a minimum and maximum amount of plastic dissipation is accumulated. While the graded layer has a measurable effect, plastic dissipation is still dominated by the mode of loading.

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