Large stable crack growth in fracture mechanics specimens

Brocks, W.; Eberle, A.; Fricke, Stefan; Veith, H.

doi:10.1016/0029-5493(94)90183-x

Cited by 15 publications

(6 citation statements)

References 14 publications

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“…which indeed was found to be the case [58] (see also Figure 12). James et al [59][60], (see also [35]) showed that δ 5 -displacement curves could be predicted by finite element analyses based on CTOA.…”

Section: Figure 11supporting

confidence: 71%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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Section: Figure 11supporting

confidence: 71%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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“…• Node release techniques, controlled by fracture mechanics parameters (J, CTOD, CTOA). [62][63][64][65] • Cohesive elements. [66][67][68][69][70] • Constitutive equations based on damage mechanics concepts.…”

Section: Numerical Simulation Of Linear Elastic and Elastic-plastic F...mentioning

confidence: 99%

Computational fracture mechanics: An overview from early efforts to recent achievements

Sedmak

2018

Fatigue Fract Eng Mat Struct

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An overview of the state of the art of computational fracture mechanics is presented, starting from early efforts and going all the way up to recent achievements. Some specific aspects of linear elastic and elastic plastic fracture mechanics problems have been discussed, including the fact that even for a static loading, numerical simulation is not a simple task because of complex geometries, material nonlinearity, and heterogeneity, and especially if crack growth is considered. Therefore, micromechanical modelling of elastic‐plastic crack growth is presented as new and promising approach to overcome some of the shortages of traditional approach. Besides static loading, couple of other important practical problems are tackled, like fatigue crack growth, with remaining life in the focus of investigation, using the empirical laws for crack growth rates. Numerical simulation of fatigue crack growth is inherently complex both because of complex material damage processes and lack of sound theoretical basis to define them. Therefore, combination of theoretical, experimental, and numerical approach is presented here to get reliable and efficient estimation of life under fatigue loading.

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“…To validate the experimental results of the ductile crack growth, two-dimensional and three-dimensional finite element analyses (FEA) were performed by many researchers, such as Yuan and Brocks [9], Brocks et al [10], Henry et al [7], Kikuchi [11], and Yan and Mai [12]. Most of these studies used the J 2 flow theory of plasticity for material response idealization, and input the experimental applied load or the load-line displacement to the finite element models of various fracture specimens, including CT, TPB, SENB, SENT and CCP.…”

Section: Introductionmentioning

confidence: 99%

Determination of Constraint-Modified J-R Curves for Carbon Steel Storage Tanks

Lam

Chao

Zhu

et al. 2003

Journal of Pressure Vessel Technology

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Mechanical testing of A285 carbon steel, a storage tank material, was performed to develop fracture properties based on the constraint theory of fracture mechanics. A series of single edge-notched bend (SENB) specimen designs with various levels of crack tip constraint were used. The variation of crack tip constraint was achieved by changing the ratio of the initial crack length to the specimen depth. The test data show that the J-R curves are specimen-design-dependent, which is known as the constraint effect. A twoparameter fracture methodology is adopted to construct a constraint-modified J-R curve, which is a function of the constraint parameter, A 2 , while J remains the loading parameter. This additional fracture parameter is derived from a closed form solution and can be extracted from the finite element analysis for a specific crack configuration. Using this set of SENB test data, a mathematical expression representing a family of the J-R curves for A285 carbon steel can be developed. It is shown that the predicted J-R curves match well with the SENB data over an extensive amount of crack growth. In addition, this expression is used to predict the J-R curve of a compact tension specimen (CT), and good agreement to the actual test data is achieved. To demonstrate its application in a flaw stability evaluation, a generic A285 storage tank with a postulated axial flaw is used. For a flaw length of 10% of the tank height, the predicted J-R curve is found to be similar to that for a SENB specimen with a short notch, which is in a state of low constraint. This implies that the use of a J-R curve from the ASTM (American Society for Testing and Materials) standard designs, which typically are high constraint specimens, may be overly conservative for analysis of fracture resistance of large structures.

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Large stable crack growth in fracture mechanics specimens

Cited by 15 publications

References 14 publications

Fracture and damage mechanics modelling of thin-walled structures – An overview

Fracture and damage mechanics modelling of thin-walled structures – An overview

Computational fracture mechanics: An overview from early efforts to recent achievements

Determination of Constraint-Modified J-R Curves for Carbon Steel Storage Tanks

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