Effective local stress intensity factor criterion for prediction of crack growth trajectory under mixed mode fracture conditions

Salimi-Majd, Davood; Shahabi, Farhad; Mohammadi, Bijan

doi:10.1016/j.tafmec.2016.01.009

Cited by 34 publications

(12 citation statements)

References 53 publications

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“…By employing the SIF results determined in Eqs and , the fatigue growth of a semi‐elliptical surface flaw in a plate is examined through a two‐parameter theoretical model based on the Paris' law. According to such a model, the crack semi‐axes a and b grow, after one cyclic loading, to a new configuration described by the following expression:

\frac{x^{2}}{b_{1}^{2}} + \frac{y^{2}}{a_{1}^{2}} = 1,

where a 1 and b 1 are the semi‐axes of the surface flaw after one loading cycle (Fig.…”

Section: Numerical Calculation and Results Analysismentioning

confidence: 99%

“…Because both modes I and II occur during fatigue crack propagation, the Paris' law must take into account an equivalent SIF, which can be obtained from energetic considerations:

K_{eff} ((),, \partial ξ ζ) = \sqrt{K_{I}^{2} ((),, \partial ξ ζ) + 2 K_{I I}^{2} ((),, \partial ξ ζ)},

where K I (∂, ξ , ζ ) is evaluated by the Eq. discussed above, and K II (∂, ξ , ζ ) is computed through Eq.…”

Section: Numerical Calculation and Results Analysismentioning

confidence: 99%

“…where a 1 and b 1 are the semi-axes of the surface flaw after one loading cycle ( Fig. 18) Because both modes I and II occur during fatigue crack propagation, the Paris' law must take into account an equivalent SIF, which can be obtained from energetic considerations 25 :…”

Section: Fatigue Crack Growth Calculationmentioning

confidence: 99%

See 2 more Smart Citations

Experimental and analytical investigation of fatigue crack propagation of T‐welded joints considering the effect of boundary condition

Sun

Gan

Wang

et al. 2016

Fatigue Fract Eng Mat Struct

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T‐welded joints are commonly employed in ship and ocean structures. The fatigue failure of structure components subjected to cyclic loading always occurs in T‐welded joints because of the metallurgical differences, tensile residual stress fields and stress concentrations. The former researches about T‐welded joints fatigue have in common that the boundary condition needs to be taken into account as an influencing parameter to predict the crack propagation during cyclic loading. In this paper, the crack growth behaviour in T‐welded joint processed with Q345D steel (Pingxiang Iron & Steel Co., Ltd, Hukou, Jiangxi Province in China) under the fatigue loading was analysed via analytical model and verified via experiment. The results show that the influence of boundary condition should be considered in T‐welded joint structure during crack propagation in weld toe area. The correction factor concerning the effect of boundary condition and modified Paris' equation was proposed according to the experimental results and verified by the following repeated experiments.

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\frac{x^{2}}{b_{1}^{2}} + \frac{y^{2}}{a_{1}^{2}} = 1,

where a 1 and b 1 are the semi‐axes of the surface flaw after one loading cycle (Fig.…”

Section: Numerical Calculation and Results Analysismentioning

confidence: 99%

“…Because both modes I and II occur during fatigue crack propagation, the Paris' law must take into account an equivalent SIF, which can be obtained from energetic considerations:

K_{eff} ((),, \partial ξ ζ) = \sqrt{K_{I}^{2} ((),, \partial ξ ζ) + 2 K_{I I}^{2} ((),, \partial ξ ζ)},

where K I (∂, ξ , ζ ) is evaluated by the Eq. discussed above, and K II (∂, ξ , ζ ) is computed through Eq.…”

Section: Numerical Calculation and Results Analysismentioning

confidence: 99%

See 1 more Smart Citation

Experimental and analytical investigation of fatigue crack propagation of T‐welded joints considering the effect of boundary condition

Sun

Gan

Wang

et al. 2016

Fatigue Fract Eng Mat Struct

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“…Many proposed elemental life assessment models neither needs additional material properties nor pre‐existing cracks for defining fatigue damage mechanism in MD laminates. However, non‐destructive assessment of residual life using experimental data still possesses a substantial challenge for researchers . The combined use of experimental residual stiffness, energy dissipation, and matrix crack density computation approach as explained in this paper provides a comparative life monitoring approach for any stacking sequence.…”

Section: Introductionmentioning

confidence: 99%

“…However, non-destructive assessment of residual life using experimental data still possesses a substantial challenge for researchers. [56][57][58][59] The combined use of experimental residual stiffness, energy dissipation, and matrix crack density computation approach as explained in this paper provides a comparative life monitoring approach for any stacking sequence. Here, the computation of normalised stiffness and energy parameter requires load-displacement data whereas the evaluation of matrix crack density needs optical image processing.…”

Section: Introductionmentioning

confidence: 99%

Effect of fatigue loading on stiffness degradation, energy dissipation, and matrix cracking damage of CFRP [±45]_3Scomposite laminate

Behera

Dupare

Thawre

et al. 2019

Fatigue Fract Eng Mat Struct

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In this study, a concept of using experimental matrix crack density, residual stiffness, and energy dissipation as a comparative life monitoring tool for any arbitrary stacking sequence is proposed. First, IMA/M21 [±45]3S carbon fibre‐reinforced polymer (CFRP) multidirectional (MD) laminates were fabricated by autoclaving technique. The static tension and compression tests were conducted to determine the fatigue stress levels. Then, constant amplitude tension–tension fatigue tests were carried out at two stress ratios (R = σmin/σmax) of 0.1 and 0.5. Three stress levels on the basis of cycles to failure (Nf) were chosen, ie, lower stress run‐out (LSR), lower stress fractured (LSF), and higher stress fractured (HSF). The LSF and LSR specimens primarily degraded due to matrix cracking that caused higher stiffness degradation and lower energy parameter, whereas HSF specimens having the least possibility of matrix crack growth showed lower stiffness degradation and higher energy parameter in a fibre‐dominated failure.

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A phase-field model of hydraulic fractures in acidized porous media with strain-softening properties

Liu,

Yi,

Yang

et al. 2024

Computers and Geotechnics

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Effective local stress intensity factor criterion for prediction of crack growth trajectory under mixed mode fracture conditions

Cited by 34 publications

References 53 publications

Experimental and analytical investigation of fatigue crack propagation of T‐welded joints considering the effect of boundary condition

Experimental and analytical investigation of fatigue crack propagation of T‐welded joints considering the effect of boundary condition

Effect of fatigue loading on stiffness degradation, energy dissipation, and matrix cracking damage of CFRP [±45]_3Scomposite laminate

A phase-field model of hydraulic fractures in acidized porous media with strain-softening properties

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Effective local stress intensity factor criterion for prediction of crack growth trajectory under mixed mode fracture conditions

Cited by 34 publications

References 53 publications

Experimental and analytical investigation of fatigue crack propagation of T‐welded joints considering the effect of boundary condition

Experimental and analytical investigation of fatigue crack propagation of T‐welded joints considering the effect of boundary condition

Effect of fatigue loading on stiffness degradation, energy dissipation, and matrix cracking damage of CFRP [±45]3Scomposite laminate

A phase-field model of hydraulic fractures in acidized porous media with strain-softening properties

Contact Info

Product

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Effect of fatigue loading on stiffness degradation, energy dissipation, and matrix cracking damage of CFRP [±45]_3Scomposite laminate