Fatigue crack propagation in complex stress fields: Experiments and numerical simulations using the Extended Finite Element Method (XFEM)

Bergara, A.; Dorado, Jose I.; Martı́n-Meizoso, A.; Martı́nez-Esnaola, J.M.

doi:10.1016/j.ijfatigue.2017.05.026

Cited by 105 publications

(42 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Progressive failure defines how damage propagates though a laminate and can be caused by cyclic or monotonic loading [20]- [22]. The modeling technique that is discussed here was used to model the progressive damage of a CFRP laminate.…”

Section: Damage Modelmentioning

confidence: 99%

Investigation of tensile and in-plane shear properties of carbon fiber reinforced composites with and without piezoelectric patches for micro-crack propagation using extended finite element method

et al. 2018

View full text Add to dashboard Cite

Mughal, M. (2019). Investigation of tensile and inplane shear properties of carbon fiber reinforced composites with and without piezoelectric patches for microcrack propagation using extended finite element method. AbstractThe smart materials are capable to integrate the remarkabale active functions into a traditional structure of the composites. There is a wide reaseach possibility towards the embedded patches into a composite primary structure. This particular study aims to investigate the effect of the embedded smart materials in a conventional composite laminate. Carbon Fiber Reinforced Composite specimens with and without PZT piezo elements embedded in the structure are studied for Tensile, In-plane Shear and three point bending properties. Previously researched mechanical behaviour and the operational influence of the piezo sensors are sequentially analysed, particularly for the elecetric capacitance during all the categories of testing. The limitations have also been studied into the comparison of the structure with and without the piezoelectric material patches. The extended Finite Element (XFEM) modelling approach has been applied to study the sensorized damage model for the numerical and experimental study. This study also presents simplified and understandable techniques and offers a new direction for the experimental and computational modelling design for the progressive damage, based on the principles of Extended Finite Element Method (XFEM). The extensive experimentation and numerical modelling for interlaminar and intralaminar crack of Carbon Fiber Reinforced Composite CFRCs materials are studied, with and without piezoelectric patches. The experiments and simulations are designed and grouped into categories of load, boundary conditions and types arranged accordingly for fracture, delamination, fiber breakage and matrix crack towards the damage evolution. The dimensions of the specimens and the effects are also studied regarding lengths, thickness and width in multiple categories. The loading cases of tension and the inplane shear are studied for multiple cases for numerical as well as experimental investigation having different orientations and dimensions. The delaminated and fractured mode I and mode II specimen were analysed for the expected and the real time values of strength to figure out the precise values of trends to predict the composite properties.

show abstract

Section: Damage Modelmentioning

confidence: 99%

Investigation of tensile and in-plane shear properties of carbon fiber reinforced composites with and without piezoelectric patches for micro-crack propagation using extended finite element method

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Moës, et al [51] used the symbol H(x) for this enrichment function, and subsequent authors have often referred to it as the Heaviside function, e.g. [53,55,57,59], even though the Heaviside step function formally has the property H(ϕ(x)) = 0 if ϕ(x) ≤ 0 [15]. However, the sign and the Heaviside step functions do actually lead to identical results because they span the same approximation space [15].…”

Section: The Stress and Displacement Fieldsmentioning

confidence: 99%

“…However, the sign and the Heaviside step functions do actually lead to identical results because they span the same approximation space [15]. By using the crack tip and step enrichments, an appropriate approximation for the stress and displacement fields may be obtained, both for two-dimensional [51,60] and three-dimensional [57,59] cracks. If we divide the additional degrees of freedom, q, into those around the crack tip, b (indicated by ▲ in Figure 4(b)), and those remaining, a (indicated by • in Figure 4(b)), we can rewrite equation (11) [15]: …”

Section: The Stress and Displacement Fieldsmentioning

confidence: 99%

“…Comparisons of XFEM fatigue simulations to experimental results have recently been published by Bergara, et al [59]. In this work, they have used the XFEM-based LEFM approach which is implemented in Abaqus to simulate the growth of a semi-elliptical crack located at the side of a beam specimen subjected to four-point bending.…”

Section: Fatigue Crack Propagation and Current Trendsmentioning

confidence: 99%

See 1 more Smart Citation

A review of fatigue crack propagation modelling techniques using FEM and XFEM

Rege

Lemu

2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

The study of the dissipation heat flow and the acoustic emission during the fatigue crack propagation in the metal A N Vshivkov, A Yu Iziumova, I A Panteleev et al. noAbstract. Fatigue is one of the main causes of failures in mechanical and structural systems. Offshore installations, in particular, are susceptible to fatigue failure due to their exposure to the combination of wind loads, wave loads and currents. In order to assess the safety of the components of these installations, the expected lifetime of the component needs to be estimated. The fatigue life is the sum of the number of loading cycles required for a fatigue crack to initiate, and the number of cycles required for the crack to propagate before sudden fracture occurs. Since analytical determination of the fatigue crack propagation life in real geometries is rarely viable, crack propagation problems are normally solved using some computational method. In this review the use of the finite element method (FEM) and the extended finite element method (XFEM) to model fatigue crack propagation is discussed. The basic techniques are presented, together with some of the recent developments. IntroductionComponents which are subjected to fluctuating loads are found virtually everywhere: Vehicles and other machinery contain rotating axles and gears, pressure vessels and piping may be subjected to pressure fluctuations (e.g. water hammer) or repeated temperature changes, structural members in bridges are subjected to traffic loads and wind loads, while those in ships and offshore structures are subjected to the combination of wind loads, wave loads and currents. If the components are subjected to a fluctuating load of a certain magnitude for a sufficient amount of time, small cracks will nucleate in the material. Over time, the cracks will propagate, up to the point where the remaining cross-section of the component is not able to carry the load, at which the component will be subjected to sudden fracture [1]. This process is called fatigue, and is one of the main causes of failures in structural and mechanical components [2]. In order to assess the safety of the component, engineers need to estimate its expected lifetime. The fatigue life is the sum of the number of loading cycles required for a fatigue crack to nucleate/initiate, and the number of cycles required for the crack to propagate until its critical size has been reached [2,3]. In this paper, computational methods to estimate the lifespan of a propagating crack whose initial geometry is known will be considered.Estimations of the fatigue crack propagation rate, da/dN, are normally based on a relation with the range of the stress intensity factor, ΔK, which is a linear elastic fracture mechanics (LEFM) parameter for quantifying the load and geometry of the crack. Paris, Gomez and Anderson [4] first proposed the existence of such a relation in 1961, and its simplest form is the Paris law [5]:

show abstract

“…It is based on the standard finite-element framework and uses a special displacement function to allow the existence of discontinuities, which overcome the need to continuously re-mesh during crack tip expansion process. XFEM were used to calculate SIF, performed crack growth analysis without updating the mesh [8]. The fatigue crack propagation of interface cracks in two-layer materials were studied using XFEM [9], as well as various three-dimensional planes, and non-planar and arbitrary shapes' fatigue crack propagation simulation [10].…”

Section: Introductionmentioning

confidence: 99%

The numerical simulation of fatigue crack propagation in Inconel 718 alloy at different temperatures

Duan

Chen

2020

View full text Add to dashboard Cite

Inconel 718 alloy is the most commonly used material of aero-engine turbine today. However, Inconel 718 alloy is known to suffer from the fatigue crack propagation during engine operation, which will lead to unstable fracture and seriously threatens the safety of the engine. In this paper, we research the fatigue crack propagation process of Inconel 718 alloy unilateral notched standard CT specimen at room temperature (298.15 K), 573.15 K, and 823.15 K under the type I cyclic fatigue load. The ABAQUS is used for numerical simulation. First, parametric models are established. Second, the extended finite-element method (XFEM) is used to in the calculation process for describing the crack state. Third, the stress intensity factor at the crack tip under different temperatures is calculated, and the extended finite-element crack length is solved to obtain the fatigue crack growth rate da/dN curve. The innovation is we use the XEFM method to predict the fatigue crack growth process of Inconel 718 alloy, and compare it with the test results to verify the reliability of the XEFM method under low stress intensity factor. We also provide some possible reasons for the error of XEFM results under high stress intensity factors, and the development of simulation methods should be emphasized.

show abstract

Fatigue crack propagation in complex stress fields: Experiments and numerical simulations using the Extended Finite Element Method (XFEM)

Cited by 105 publications

References 29 publications

Investigation of tensile and in-plane shear properties of carbon fiber reinforced composites with and without piezoelectric patches for micro-crack propagation using extended finite element method

Investigation of tensile and in-plane shear properties of carbon fiber reinforced composites with and without piezoelectric patches for micro-crack propagation using extended finite element method

A review of fatigue crack propagation modelling techniques using FEM and XFEM

The numerical simulation of fatigue crack propagation in Inconel 718 alloy at different temperatures

Contact Info

Product

Resources

About