On the decomposition of the J-integral for 3D crack problems

1993 ◽  
Vol 64 (4) ◽  
pp. 339-348 ◽  
Author(s):  
O. Huber ◽  
J. Nickel ◽  
G. Kuhn
Keyword(s):  
J Integral ◽  
Crack Problems

J-integral evaluation for 2D mixed-mode crack problems employing a meshfree stabilized conforming nodal integration method

2016 ◽  
Vol 58 (2) ◽  
pp. 185-198 ◽  
Author(s):  
Satoyuki Tanaka ◽  
Hirotaka Suzuki ◽  
Shota Sadamoto ◽  
Shogo Sannomaru ◽  
Tiantang Yu ◽  
...  
Keyword(s):  
Mixed Mode ◽  
Integration Method ◽  
J Integral ◽  
Integral Evaluation ◽  
Nodal Integration ◽  
Mixed Mode Crack ◽  
Crack Problems ◽  
Stabilized Conforming Nodal Integration

Combined Adaptive Finite Element Method and J-Domain Integral Technique for Crack Problems

2007 ◽  
Vol 340-341 ◽  
pp. 459-464
Author(s):  
Kobsak Potjananapasiri ◽  
Sutthisak Phongthanapanich ◽  
Paritud Bhandhubanyong ◽  
Pramote Dechaumphai
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Crack Tip ◽  
Adaptive Finite Element Method ◽  
J Integral ◽  
Adaptive Finite Element ◽  
Domain Integral ◽  
Integral Technique ◽  
Crack Problems ◽  
Element Method

An adaptive finite element method for analyzing two-dimensional and axisymmetric nonlinear elastic fracture mechanics problems with cracks is presented. The J-integral is used as a parameter to characterize the severity of stresses and deformation near a crack tip. The domain integral technique is utilized as the J-integral solution scheme with the 9-node degenerated crack tip elements. The solution accuracy is further improved by incorporating an error estimation procedure to a remeshing algorithm with a solution mapping scheme to resume the analysis at a particular load level after the adaptive remeshing technique has been applied. Two benchmark problems are analyzed to evaluate the efficiency of the combined procedure.

Constraint Effects of Clad on Underclad Crack

1996 ◽  
Vol 118 (4) ◽  
pp. 480-483 ◽  
Author(s):  
N. Miyazaki ◽  
T. Ikeda ◽  
K. Ochi
Keyword(s):  
Stress Distribution ◽  
Base Material ◽  
Crack Tip ◽  
J Integral ◽  
Q Factor ◽  
The Finite Element Method ◽  
Constraint Effect ◽  
Crack Problems ◽  
Class 1 ◽  
Constraint Effects

The finite element method is applied to two-dimensional elastic-plastic analyses for underclad crack problems. The analyses are performed for rectangular specimens with an underclad crack, which are composed of A533B class 1 steel and a clad material, to obtain the fracture mechanics parameter J-integral and the stress distribution ahead of a crack tip. The Q-factor proposed by O’Dowd and Shih is calculated from the stress distribution ahead of a crack tip, and the constraint effect of a crack tip due to a clad material or the effect of a clad material on the fracture toughness of a base material is discussed in terms of the Q-factor. Clad thickness, crack length, and the material property of a clad material are varied to examine their effects.

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