Experimental and numerical studies to estimate fatigue crack growth behavior of Ni-based super alloy

Kumar, Manish; Ahmad, S.; Singh, I.V.; Rao, A. Venugopal; Kumar, Jalaj; Kumar, Vikas

doi:10.1016/j.tafmec.2018.07.002

Cited by 33 publications

(12 citation statements)

References 25 publications

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“…where n C is the versor identifying the direction of crack propagation (see Figure 2). Starting from Equations ( 9) to (11), the weak form of the Laplacian smoothing can be obtained using the Lagrangian multiplier method (LMM) as follows:…”

Section: Governing Equations: the Ale Formulation Of Solid Mechanics ...mentioning

confidence: 99%

“…[6][7][8] The continuous changes in the stress levels cause the progressive and stable growth of the preexisting microscopic defects inside the material, 9 whose rate strictly depends on the intensity and frequency of the stress cycles. [10][11][12] The continuous growth of micro-cracks leads to coalescence and macroscopic crack propagation events that progressively reduce the integrity of the material components until their total failure. Fatigue failures occur suddenly, without sign of evidence, thus leading to economic losses and severe health risks to people.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18][19][20] However, although experimental tests provide a comprehensive understanding of the fatigue behavior of a material component, they are too expensive and time consuming. 11 Because of such drawbacks, the fatigue life estimation of a material component is increasingly analyzed using numerical simulations. The clear advantages provided by numerical simulations as means of analysis have led to the development of different numerical approaches for reproducing fatigue crack propagation phenomena, such as the finite element method (FEM), [21][22][23][24] the extended finite element method (XFEM), 8,[25][26][27][28] or traditional meshless methods.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, loss of accuracy issues may occur, while the field variables are mapped from the old to the new mesh configuration, thus affecting the reliability of the numerical solution and the computational solver's stability. 11 To overcome drawbacks related to the use of remeshing actions, several refined FEM methodologies have been recently proposed, such XFEM approach or, more recently, advanced cohesive zone models (CZMs) based on diffuse interface model (DIM) strategies. [32][33][34][35][36][37][38][39] Despite their efficacy, such strategies can be onerous from a computational point of view, especially in the case of large and complex geometries.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue crack growth simulation using the moving mesh technique

Ammendolea,

Greco,

Leonetti

et al. 2023

Fatigue Fract Eng Mat Struct

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This work proposes a finite element (FE)‐based numerical model that uses the moving mesh technique for simulating fatigue crack propagation phenomena inside material components subjected to cyclic loads. Precisely, the computational mesh is adjusted during the numerical simulation according to conditions dictated by the criteria of fracture mechanics. Unlike standard FE procedures, which perform remeshing for each increment of the crack length, the proposed model updates the computational mesh only when FEs are distorted excessively because of the mesh nodes' motion, thus reducing computational burdens considerably. The validity of the proposed method is assessed through comparisons with existing experimental and numerical results.

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Section: Governing Equations: the Ale Formulation Of Solid Mechanics ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fatigue crack growth simulation using the moving mesh technique

Ammendolea,

Greco,

Leonetti

et al. 2023

Fatigue Fract Eng Mat Struct

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“…XFEM approach has been implemented by various researchers for modeling crack problems. [22][23][24][25] For the safety of structures, it is necessary to check the accurate J-integral at the crack tip as it considers the yielding in the vicinity of the crack tip and studies the performance of a cracked component in the presence of inelasticity. A few computational works have been carried out by computing the J-integral value for the study of fracture mechanics.…”

Section: Introductionmentioning

confidence: 99%

Fracture analysis of plastically graded material with thermo-mechanicalJ-integral

Gajjar

Pathak

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this paper, the influence of plasticity graded property and thermal boundary conditions have been investigated on the fracture parameter, i.e. J-integral using the extended finite element method. A complete computational methodology has been presented to model elasto-plastic fracture problems with geometrical and material nonlinearities. For crack discontinuity modeling, a partition of unity enrichment concept was employed with additional mathematical functions like Heaviside and branch enrichment for crack discontinuity and stress field gradient, respectively. The modeling of the stress–strain relationship of the material is implemented using the Ramberg–Osgood material model and geometric nonlinearity is modeled using an updated Lagrangian approach. The isotropic hardening and von-Mises yield criteria are considered to check the plasticity condition. The elastic predictor–plastic corrector algorithm is employed to capture elasto-plastic stress in a cracked domain. The variation in plasticity properties for plastically graded material is modeled by exponential law. Furthermore, the nonlinear discrete equations are numerically solved using a Newton–Raphson iterative scheme. Various cracked problem geometries subjected to thermal (adiabatic and isothermal conditions) and thermo-mechanical loads are simulated for stress contours and J-integrals using the elasto-plastic fracture mechanics approach. A comparison of the results obtained using extended finite element method with literature and the finite element analysis (FEA) package shows the accuracy and effectiveness of the presented computational approach. A component-based problem, i.e. a Brazilian disc subjected to thermo-mechanical loading, has been solved to show the adaptability of this work.

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XFEM for 3D Fracture Simulation

Vir Singh

2023

Partition of Unity Methods

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Experimental and numerical studies to estimate fatigue crack growth behavior of Ni-based super alloy

Cited by 33 publications

References 25 publications

Fatigue crack growth simulation using the moving mesh technique

Fatigue crack growth simulation using the moving mesh technique

Fracture analysis of plastically graded material with thermo-mechanicalJ-integral

XFEM for 3D Fracture Simulation

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