A crack-tip element for modelling arbitrary crack propagations

Fu, Qiang; Yi, Sinan; Chen, Boyang; Bui, Tinh Quoc; Hu, Xiaofei; Yao, Weian

doi:10.1016/j.tafmec.2019.102422

Cited by 14 publications

(5 citation statements)

References 71 publications

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“…Subsequently, the direction of crack growth observed in this study is compared with both experimental crack trajectories conducted by Bittencourt et al [45], and numerical results obtained by Andrade and Leonel [46], who utilized an adaptive finite element approach on a multifunctional super singular element. Additionally, a comparison is made with the numerical method using the floating node method, which was combined with the symplectic analytical singular element by Fu et al [47]. The crack growth path predicted in the current study demonstrated greater accuracy in reaching the middle hole compared to the predicted crack path obtained by Huynh et al [48], which employed a polygonal XFEM with new numerical integration.…”

Section: Property Value In Metric Unitmentioning

confidence: 61%

“…This similarity between the predicted and experimental crack tip coordinates highlights the effectiveness and reliability of the crack growth prediction in the analysis. [45], (c) numerical [46], (d) numerical [47], (e) numerical [48], (f) numerical [49], and (g) coordinates of crack growth path.…”

Section: Property Value In Metric Unitmentioning

confidence: 99%

“…Figure 4. Crack growth path for case 1, (a) present study, (b) experimental[45], (c) numerical[46], (d) numerical[47], (e) numerical[48], (f) numerical[49], and (g) coordinates of crack growth…”

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confidence: 99%

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Investigating the Influence of Holes as Crack Arrestors in Simulating Crack Growth Behavior Using Finite Element Method

Fageehi,

Alshoaibi

2024

Applied Sciences

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The primary focus of this paper is to investigate the application of ANSYS Workbench 19.2 software’s advanced feature, known as Separating Morphing and Adaptive Remeshing Technology (SMART), in simulating the growth of cracks within structures that incorporate holes. Holes are strategically utilized as crack arrestors in engineering structures to prevent catastrophic failures. This technique redistributes stress concentrations and alters crack propagation paths, enhancing structural integrity and preventing crack propagation. This paper explores the concept of using holes as crack arrestors, highlighting their significance in increasing structural resilience and mitigating the risks associated with crack propagation. The crack growth path is estimated by applying the maximum circumferential stress criterion, while the calculation of the associated stress intensity factors is performed by applying the interaction integral technique. To analyze the impact of holes on the crack growth path and evaluate their effectiveness as crack arrestors, additional specimens with identical external dimensions but without any internal holes were tested. This comparison was conducted to provide a basis for assessing the role of holes in altering crack propagation behavior and their potential as effective crack arrestors. The results of this study demonstrated that the presence of a hole had a significant influence on the crack growth behavior. The crack was observed to be attracted towards the hole, leading to a deviation in its trajectory either towards the hole or deflecting around it. Conversely, in the absence of a hole, the crack propagated without any alteration in its path. To validate these findings, the computed crack growth paths and associated stress intensity factors were compared with experimental and numerical data available in the open literature. The remarkable consistency between the computational study results for crack growth path, stress intensity factors, and von Mises stress distribution, and the corresponding experimental and numerical data, is a testament to the accuracy and reliability of the computational simulations.

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Section: Property Value In Metric Unitmentioning

confidence: 61%

Section: Property Value In Metric Unitmentioning

confidence: 99%

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Investigating the Influence of Holes as Crack Arrestors in Simulating Crack Growth Behavior Using Finite Element Method

Fageehi,

Alshoaibi

2024

Applied Sciences

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“…These same blending elements are present at regions where the crack branches because of the mix of enrichment functions required. Aiming to address multiple and branching cracks, some recent works can be cited (Chen and Zhou, 2019; Ding et al , 2020b; Fu et al , 2020).…”

Section: Discussionmentioning

confidence: 99%

On the numerical integration in generalized/extended finite element method analysis for crack propagation problems

Campos

Barros

Penna

2020

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Purpose The purpose of this paper is to evaluate some numerical integration strategies used in generalized (G)/extended finite element method (XFEM) to solve linear elastic fracture mechanics problems. A range of parameters are here analyzed, evidencing how the numerical integration error and the computational efficiency are improved when particularities from these examples are properly considered. Design/methodology/approach Numerical integration strategies were implemented in an existing computational environment that provides a finite element method and G/XFEM tools. The main parameters of the analysis are considered and the performance using such strategies is compared with standard integration results. Findings Known numerical integration strategies suitable for fracture mechanics analysis are studied and implemented. Results from different crack configurations are presented and discussed, highlighting the necessity of alternative integration techniques for problems with singularities and/or discontinuities. Originality/value This study presents a variety of fracture mechanics examples solved by G/XFEM in which the use of standard numerical integration with Gauss quadratures results in loss of precision. It is discussed the behaviour of subdivision of elements and mapping of integration points strategies for a range of meshes and cracks geometries, also featuring distorted elements and how they affect strain energy and stress intensity factors evaluation for both strategies.

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“…Several techniques involving various equations in SIF calculation are available in the literature [2,13,14]. Recently, Fu et al [15] proposed a crack-tip element for modelling crack propagation by taking the advantages of the symplectic analytical singular element (SASE) and the floating node method (FNM). In their method, accurate crack-tip fields (displacement and stress) can be captured, and multiple crack propagations can be modelled without remeshing.…”

Section: Introductionmentioning

confidence: 99%

Nonplanar Crack Growth Simulation of Multiple Cracks Using Finite Element Method

Fageehi

Alshoaibi

2020

Advances in Materials Science and Engineering

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This work deals with a 2D finite element simulation of nonplanar multiple cracks using fracture and crack propagation analysis. This analysis was performed by using the developed source code software written by Visual Fortran Language. This source code includes the adaptive mesh generation utilizing the advanced front method and also the mesh refinement process. In order to correctly represent the field singularity, the quarter-point singular elements are constructed around the tip of the crack. The crack growth criteria are used to predict the crack growth direction by utilizing the circumferential stress factor in calculating the yielding stress in elastic fracture assumptions. The stress intensity factor determination is one of the most critical procedures as it determines the crack initiation and propagation mechanism. Moreover, the stress intensity factor histories during the crack growth are measured with the use of equivalent domain integral methods. The crack path simulation and stress intensity factor calculations are compared with the literature and revealed that the results are in agreement with research carried in this domain.

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A crack-tip element for modelling arbitrary crack propagations

Cited by 14 publications

References 71 publications

Investigating the Influence of Holes as Crack Arrestors in Simulating Crack Growth Behavior Using Finite Element Method

Investigating the Influence of Holes as Crack Arrestors in Simulating Crack Growth Behavior Using Finite Element Method

On the numerical integration in generalized/extended finite element method analysis for crack propagation problems

Nonplanar Crack Growth Simulation of Multiple Cracks Using Finite Element Method

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