Adaptive Finite Element Prediction of Fatigue Life and Crack Path in 2D Structural Components

Bashiri, Abdullateef H.; Alshoaibi, Abdulnaser M.

doi:10.3390/met10101316

Cited by 12 publications

(13 citation statements)

References 37 publications

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“…On the other hand, these analytical solutions are restricted to simple crack geometries and loading conditions [2]. Small-sized yield requirements were implemented [45], which established a Jintegral methodology for investigating the nonlinear behavior of the material [46]. The equivalent domain integral methodology replaces the finite-size domain with a divergence theorem by integration along the contour for FEM.…”

Section: Sifs Methodsmentioning

confidence: 99%

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2D and 3D numerical simulation of fatigue crack growth path and life predictions of a linear elastic

Bashiri

2021

Materials Science-Poland

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This paper describes implementation of the finite element method (FEM) to investigate crack growth problems in linear elastic fracture mechanics and the correlation of results with experimental and numerical data. The approach involved using two different software to compute stress intensity factors (SIFs), the crack propagation trajectory, and fatigue life estimation in two and three dimensions. According to the software, crack modeling might be run in various ways. The first is a developed source code program written in the Visual Fortran language, while the second is the widely used ANSYS Mechanical APDL 19.2 software. The fatigue crack propagation trajectory and the corresponding SIFs were predicted using these two software programs. The crack direction was investigated using the maximum circumferential stress theory, and the finite element (FE) analysis for fatigue crack growth was done for both software based on Paris's law. The predicted results in both software demonstrated the influence of holes on the crack growth trajectory and all associated stresses and strains. The study's findings agree with other experimental and numerical crack propagation studies presented in the literature that reveal similar crack propagation trajectory observations.

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Section: Sifs Methodsmentioning

confidence: 99%

“…The step by step procedure of the developed program software is illustrated in Figure 3. The details of these steps are explained in the literature [29,45,[47][48][49][50]. The adaptive mesh refinement was explained in detail by Bashiri and Alshoaibi [45].…”

Section: Sifs Methodsmentioning

confidence: 99%

2D and 3D numerical simulation of fatigue crack growth path and life predictions of a linear elastic

Bashiri

2021

Materials Science-Poland

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“…The computational procedure for modeling fatigue crack growth is depicted in Figure 1. The details of these steps are explained by [25,26,[28][29][30][31].…”

Section: Developed Program Proceduresmentioning

confidence: 99%

“…Commercial software may also be used to model fracture propagation and fatigue life prediction; however, such software is highly expansive, and it is practically difficult to access the source code for further development. The proposed program's effectiveness was shown in a variety of scenarios with accurate results e.g., [18,[25][26][27][28].…”

Section: Introductionmentioning

confidence: 96%

Adaptive Finite Element Model for Simulating Crack Growth in the Presence of Holes

Alshoaibi

Fageehi

2021

Materials

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This study presents a developed finite element code written by Visual Fortran to computationally model fatigue crack growth (FCG) in arbitrary 2D structures with constant amplitude loading, using the linear elastic fracture mechanics (LEFM) concept. Accordingly, optimizing an FCG analysis, it is necessary to describe all the characteristics of the 2D model of the cracked component, including loads, support conditions, and material characteristics. The advancing front method has been used to generate the finite element mesh. The equivalent stress intensity factor was used as the onset criteria of crack propagation, since it is the main significant parameter that must be precisely predicted. As such, a criterion premised on direction (maximum circumferential stress theory) was implemented. After pre-processing, the analysis continues with incremental analysis of the crack growth, which is discretized into short straight segments. The adaptive mesh finite element method was used to perform the stress analysis for each increment. The displacement extrapolation technique was employed at each crack extension increment to compute the SIFs, which are then assessed by the maximum circumferential stress theory to determine the direction of the crack growth and predict the fatigue life as a function of crack length using a modified form of Paris’ law. The application examples demonstrate the developed program’s capability and performance.

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“…In order to simulate 2D cracks under mixed mode loading, the current developed software code is formulated to allow the researcher to estimate the fatigue life and crack trajectory using the automated adaptive mesh finite element [11][12][13][14][15]. This software was created in 2004 and continues to include several features for the simulation of two-dimensional fatigue crack growth under LEFM assumptions [12,[16][17][18][19][20][21]. The use of commercial software for engineers is not appropriate in at least two aspects: First, the basic algorithm that lies behind it is not fully understood, and second, the execution is completely apprehended throughout the programming ability.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Quasi-Static Crack Propagation by Adaptive Finite Element Method

Alshoaibi

Fageehi

2021

Metals

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The finite element method (FEM) is a widely used technique in research, including but not restricted to the growth of cracks in engineering applications. However, failure to use fine meshes poses problems in modeling the singular stress field around the crack tip in the singular element region. This work aims at using the original source code program by Visual FORTRAN language to predict the crack propagation and fatigue lifetime using the adaptive dens mesh finite element method. This developed program involves the adaptive mesh generator according to the advancing front method as well as both the pre-processing and post-processing for the crack growth simulation under linear elastic fracture mechanics theory. The stress state at a crack tip is characterized by the stress intensity factor associated with the rate of crack growth. The quarter-point singular elements are constructed around the crack tip to accurately represent the singularity of this region. Under linear elastic fracture mechanics (LEFM) with an assumption in various configurations, the Paris law model was employed to evaluate mixed-mode fatigue life for two specimens under constant amplitude loading. The framework includes a progressive analysis of the stress intensity factors (SIFs), the direction of crack growth, and the estimation of fatigue life. The results of the analysis are consistent with other experimental and numerical studies in the literature for the prediction of the fatigue crack growth trajectories as well as the calculation of stress intensity factors.

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Adaptive Finite Element Prediction of Fatigue Life and Crack Path in 2D Structural Components

Cited by 12 publications

References 37 publications

2D and 3D numerical simulation of fatigue crack growth path and life predictions of a linear elastic

2D and 3D numerical simulation of fatigue crack growth path and life predictions of a linear elastic

Adaptive Finite Element Model for Simulating Crack Growth in the Presence of Holes

Simulation of Quasi-Static Crack Propagation by Adaptive Finite Element Method

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