Elastic–plastic finite element analysis and experimental study of short and long fatigue crack growth

Zhang, Jiazhen; Zhang, Jiazhong; Du, Shan Yi

doi:10.1016/s0013-7944(01)00047-9

Cited by 51 publications

(22 citation statements)

References 10 publications

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“…There are so many references [9][10][11][12][13][14][15] which the problem is modeled by finite element method. Due to a great scattering in the experimental results [15][16][17][18], direct comparison of numerical and experimental results does not add conclusive criteria about the validity of the numerical results [8].…”

Section: Introductionmentioning

confidence: 99%

“…Thereupon Fleck [9] worked on the plane strain case, then Chermahini [9][10][11][12][13][14][15][16][17][18][19][20] continued this line of research with the three-dimensional models. Then McClung and Sehitoglu [21][22][23][24][25][26][27] investigated the influence of various parameters and different aspects such as the study of the plastic zone size.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Mesh Sensitivity Influence to Determine Crack Characteristic by Finite Element Methods

Azimi

Mirjavadi

Asli

2016

J Fail. Anal. and Preven.

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In this research, an extended finite element model has been investigated. Investigation of opening and closure stress always has been one of the difficult parameters to analysis of results; therefore, the utilization of finite element methods would be a good and logical alternative for this purpose. In addition, linear elastic fracture criteria are used for validation of numerical results from the simulation. In this work, a detailed analysis of the influence of different parameters in the results of a specific specimen with a semi-elliptical tooling groove in terms of closure and opening stress is presented, and the impact of optimum element size in fracture characteristic in various load cycles has been discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Mesh Sensitivity Influence to Determine Crack Characteristic by Finite Element Methods

Azimi

Mirjavadi

Asli

2016

J Fail. Anal. and Preven.

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“…The full lamellar microstructure, obtained by a homogenization treatment in the phase field, shows excellent properties of damagetolerance, such as low FCGRs and high fracture toughness [2] . It is commonly understood that mechanical properties concerning fatigue crack of ductile material depends on the plastic flow ahead of crack tip [3][4][5][6][7][8] . However study concerning fatigue CTPZ features of equiaxed and lamellar microstructures has been rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fatigue Crack Tip Plastic Zone of α/β Titanium Alloys With Lamellar and Equiaxed Microstructures

Liu

Lei

et al. 2016

Proceedings of the 13th World Conference on Titanium

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Compared with equiaxed microstructure, the / titanium alloys with lamellar microstructure show higher fracture toughness but lower strength and ductility. Crack tip plastic zone (CTPZ) size is an important factor that influences the fracture toughness. In the present study, the CTPZ of Ti-6Al-4V with lamellar and equiaxed microstructures was characterized and compared to reveal the influence of CTPZ on fracture toughness. For lamellar microstructure, large-scale slip, coordinated deformation at grain boundaries and deformation twinning will all expand the range of the plastic zone, inducing the measured range of CTPZ to be obviously larger than that in equiaxed microstructure. Both the expanded CTPZ and the enriched plastic deformation of lamellar microstructure could promote the capacity of absorbing energy and thus increase the fracture toughness.

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“…To predict the crack propagation with the overload effect, Oliva et al [36] used the Manson-Coffin relation with the stresses and strains obtained from an FE analysis implementing a simple kinematic hardening material model. Dougherty et al [37] and Zhang et al [38] studied crack growth based on the FE stress analysis. Zhang et al [38] used the Prandtl-Ruess relationship for the material model while Dougherty et al [37] used an isotropic hardening material model.…”

Section: Introductionmentioning

confidence: 99%

“…Dougherty et al [37] and Zhang et al [38] studied crack growth based on the FE stress analysis. Zhang et al [38] used the Prandtl-Ruess relationship for the material model while Dougherty et al [37] used an isotropic hardening material model. Sehitoglu et al [30] pointed out that the material model was critical for the stress analysis of a cracked component.…”

Section: Introductionmentioning

confidence: 99%

A Continuum Mechanics Approach for Crack Initiation and Crack Growth Predictions

Jiang¹

2006

Mat.-wiss. u. Werkstofftech.

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Herrn H. Nowack zum 65. Geburtstag gewidmet Very often, different approaches are used for crack initiation and crack growth predictions. The current article introduces a recently developed approach that can be used for the predictions of both crack initiation and crack propagation. A basic assumption is that both crack nucleation and crack growth are governed by the same fatigue damage mechanisms and a single fatigue damage criterion can model both stages. A rule is that any material point fails to form a fresh crack if the total accumulated fatigue damage reaches a limit. For crack initiation predictions, the stresses and strains are obtained either directly from experiments or though a numerical analysis. For the prediction of crack growth, the approach consists of two steps. Elastic-plastic stress analysis is conducted to obtain the detailed stress-strain responses. A general fatigue criterion is used to predict fatigue crack growth. Compact specimens made of 1070 steel were experimentally tested under constant amplitude loading with different R-ratios and the overloading influence. The capability of the approach to predict both crack initiation and the crack growth under these loading conditions was demonstrated by comparing the predictions with the experimental observations.Keywords: Crack growth, crack initiation, continuum mechanics, fatigue prediction.

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Elastic–plastic finite element analysis and experimental study of short and long fatigue crack growth

Cited by 51 publications

References 10 publications

Investigation of Mesh Sensitivity Influence to Determine Crack Characteristic by Finite Element Methods

Investigation of Mesh Sensitivity Influence to Determine Crack Characteristic by Finite Element Methods

Characterization of Fatigue Crack Tip Plastic Zone of α/β Titanium Alloys With Lamellar and Equiaxed Microstructures

A Continuum Mechanics Approach for Crack Initiation and Crack Growth Predictions

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