Prediction of Accurate Mixed Mode Fatigue Crack Growth Curves using the Paris’ Law

Sajith, S.; Murthy, K.S.R.K.; Robi, P. S.

doi:10.1007/s40032-017-0418-2

Cited by 22 publications

(33 citation statements)

References 33 publications

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“…erefore, it is essential to estimate the fatigue crack path accurately in order to predict the fatigue life assessment. To this end, the maximum tangential stress criterion theory was used to predict the crack deflection angle [28][29][30] as θ � 2 arctan 1 4…”

Section: Numerical Predication Of Mixed-mode Fatigue Lifementioning

confidence: 99%

Numerical Simulation of Mixed‐Mode Fatigue Crack Growth for Compact Tension Shear Specimen

Fageehi

Alshoaibi

2020

Advances in Materials Science and Engineering

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This work concentrates on the fracture behaviour of the compact tension specimen under mixed-mode loading, and numerical investigation using ANSYS Mechanical APDL 19.2 finite element program with different modes of mix angles is carried out. The prediction of mixed-mode fatigue life under constant amplitude fatigue loading for the compact tension shear specimen (CTS) is employed using Paris’ law model for two different loading angles with agreement to the experimental results. The predicted values of ΔKeq were compared with the experimental and analytical data for various models. Depending on the analysis, the findings of the present study show consistency with the results achieved with similar models of predicting the equivalent stress intensity factor. In addition, the direction of crack growth derived from the analysis was observed to follow the same trend of the literature experimental results.

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Section: Numerical Predication Of Mixed-mode Fatigue Lifementioning

confidence: 99%

Numerical Simulation of Mixed‐Mode Fatigue Crack Growth for Compact Tension Shear Specimen

Fageehi

Alshoaibi

2020

Advances in Materials Science and Engineering

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“…It can be seen from Fig. 8 A detailed investigation of the present study using a variety of benchmark examples along with some recommendation for the reduction of initial errors is available in [11,12].…”

Section: Performance Assessment Of Equivalent Sif Modelsmentioning

confidence: 99%

Fatigue life prediction under mixed-mode loading using equivalent stress intensity factor models

Sajith

Murthy

Robi

2018

MATEC Web of Conferences

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Damage tolerance principles are widely used to assess the structural integrity and failure of engineering components. The advances in numerical simulation techniques facilitate the prediction of fatigue life of engineering component, which is essential in damage tolerance design. For the components under mixed mode (I/II) loading, the fatigue crack growth and life is predicted by using a modified form of Paris' law along with the equivalent stress intensity factor (ΔKeq). Numerous ΔKeq models are available for correlating the equivalent stress intensity factor range and the fatigue crack growth rate. The knowledge of proper ΔKeq model is essential for the accurate fatigue life estimation. In this work, the authors numerically assess the performance of ΔKeq models in mixed mode fatigue life prediction with the help of published experimental mixed mode data.

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“…, g min has a value of zero. In to order to propagate the cracks in steps, the discrete form of ( 41) is required, and found through integration, 80 Δa C(ΔK equ ) m = ΔN.…”

Section: Tree Crackmentioning

confidence: 99%

Adaptive configurational force‐based propagation for brittle and fatigue crack analysis

Bird

Coombs

2022

Numerical Meth Engineering

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This article presents a hpr-adaptive crack propagation method for highly accurate 2D crack propagation paths which requires no a priori knowledge of the tip solution. The propagation method is designed to be simple to implement, only hr-adaptivity is required, with the propagation step size independent of the initial mesh allowing users to obtain high fidelity crack path predictions for domains containing multiple cracks propagating at different rates. The proposed method also includes a crack path derefinement scheme, where elements away from the crack tip are derefined whilst elements close to the crack tip are small so capture the fidelity of the crack path. The result is that the propagation of cracks over an increasingly larger distances has negligible increased computational effort and effect on the propagation path prediction. The linear elastic problem is solved using the hp discontinuous Galerkin symmetric interior penalty finite element method, which is post-processed to obtain the configurational force at each tip to a user defined accuracy. Several numerical examples are used to demonstrate the accuracy, efficiency, and capability of the method. Due to the method's high accuracy crack path solutions of benchmark problems that are prolifically used in the literature are challenged.

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Prediction of Accurate Mixed Mode Fatigue Crack Growth Curves using the Paris’ Law

Cited by 22 publications

References 33 publications

Numerical Simulation of Mixed‐Mode Fatigue Crack Growth for Compact Tension Shear Specimen

Numerical Simulation of Mixed‐Mode Fatigue Crack Growth for Compact Tension Shear Specimen

Fatigue life prediction under mixed-mode loading using equivalent stress intensity factor models

Adaptive configurational force‐based propagation for brittle and fatigue crack analysis

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