scholarly journals Isogeometric boundary element methods for three dimensional static fracture and fatigue crack growth

2017 ◽  
Vol 316 ◽  
pp. 151-185 ◽  
Author(s):  
X. Peng ◽  
E. Atroshchenko ◽  
P. Kerfriden ◽  
S.P.A. Bordas
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Boundary Element ◽  
Crack Growth ◽  
Three Dimensional ◽  
Boundary Element Methods ◽  
Static Fracture

Three-Dimensional Study of Fatigue Crack Growth in a Rotating Disc

2013 ◽  
Vol 3 (2) ◽  
pp. 45-62
Author(s):  
Eskandari Hadi ◽  
Nami Mohammad Rahim
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Crack Front ◽  
Numerical Technique ◽  
Three Dimensional ◽  
Crack Orientation ◽  
Rotating Disc ◽  
Mesh Density ◽  
Three Dimensional Finite Element

The problem of fatigue-crack-growth in a rotating disc at different crack orientation angles is studied by using an automated numerical technique, which calculates the stress intensity factors on the crack front through the three-dimensional finite element method. Paris law is used to develop the fatigue shape of initially semi-elliptical surface crack. Because of needs for the higher mesh density and accuracy near the crack, the sub-modeling technique is used in the analysis. The distribution of SIF’s along the crack front at each step of growth is studied and the effect of crack orientation on the rate of crack-growth is investigated. The calculated SIF’s are reasonable and could be used to predict the probable crack growth rates in fracture mechanics analysis and can help engineers to consider in their designing and to prevent any unwanted failure of such components.

scholarly journals Three-dimensional in situ observations of short fatigue crack growth in magnesium

2011 ◽  
Vol 59 (17) ◽  
pp. 6761-6771 ◽  
Author(s):  
A. King ◽  
W. Ludwig ◽  
M. Herbig ◽  
J.-Y. Buffière ◽  
A.A. Khan ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Three Dimensional ◽  
Short Fatigue Crack ◽  
In Situ Observations

Three-dimensional fatigue crack growth simulation of embedded cracks using s-version FEM

2019 ◽  
Vol 11 (4) ◽  
pp. 547-555
Author(s):  
Shuji Tomaru ◽  
Akiyuki Takahashi
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Evaluation Method ◽  
Residual Life ◽  
Three Dimensional ◽  
Circular Crack ◽  
Content Type ◽  
Growth Simulation ◽  
Crack Growth Simulation

Purpose Since the most of structures and structural components suffers from cyclic loadings, the study on the fatigue failure due to the crack growth has a great importance. The purpose of this paper is to present a three-dimensional fatigue crack growth simulation of embedded cracks using s-version finite element method (SFEM). Using the numerical results, the validity of the fitness-for-service (FFS) code evaluation method is verified. Design/methodology/approach In this paper, three-dimensional fatigue crack propagation analysis of embedded cracks is performed using the SFEM. SFEM is a numerical analysis method in which the shape of the structure is represented by a global mesh, and cracks are modeled by local meshes independently. The independent global and local meshes are superimposed to obtain the displacement solution of the problem simultaneously. Findings The fatigue crack growth of arbitrary shape of cracks is slow compared to that of the simplified circular crack and the crack approximated based on the FFS code of the Japan Society of Mechanical Engineers (JSME). The results tell us that the FFS code of JSME can provide a conservative evaluation of the fatigue crack growth and the residual life time. Originality/value This paper presents a three-dimensional fatigue crack growth simulation of embedded cracks using SFEM. Using this method, it is possible to apply mixed mode loads to complex shaped cracks that are closer to realistic conditions.

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