Design of Wing Spar Cross Section for Optimum Fatigue Life

Eldwaib, Khalid Ahmed; Grbović, Aleksandar; Kastratović, Gordana; Aldarwish, Mustafa

doi:10.1016/j.prostr.2018.12.074

Cited by 8 publications

(24 citation statements)

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“…It should be mentioned that there are also several studies where XFEM was used for simulating 3D fatigue crack propagations, but only with 1 crack. 179,180 Now, we focus our attention on series of papers on XFEM application published recently by Grbovic and coworkers, which deserves to be named "Belgrade school of XFEM simulation", [179][180][181][182][183][184][185][186][187][188][189] starting with an analysis of fatigue crack growth in a CCT specimen.…”

Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

“…Now, we focus our attention on series of papers on XFEM application published recently by Grbovic and coworkers, which deserves to be named “Belgrade school of XFEM simulation”, starting with an analysis of fatigue crack growth in a CCT specimen.…”

Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

“…Integral spar geometry and FE mesh with initial penny‐shaped cracks (blue circles) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

“…Cracks after the 8th step (A) and 1st crack after 22nd step of propagation (B) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

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Computational fracture mechanics: An overview from early efforts to recent achievements

Sedmak

2018

Fatigue Fract Eng Mat Struct

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An overview of the state of the art of computational fracture mechanics is presented, starting from early efforts and going all the way up to recent achievements. Some specific aspects of linear elastic and elastic plastic fracture mechanics problems have been discussed, including the fact that even for a static loading, numerical simulation is not a simple task because of complex geometries, material nonlinearity, and heterogeneity, and especially if crack growth is considered. Therefore, micromechanical modelling of elastic‐plastic crack growth is presented as new and promising approach to overcome some of the shortages of traditional approach. Besides static loading, couple of other important practical problems are tackled, like fatigue crack growth, with remaining life in the focus of investigation, using the empirical laws for crack growth rates. Numerical simulation of fatigue crack growth is inherently complex both because of complex material damage processes and lack of sound theoretical basis to define them. Therefore, combination of theoretical, experimental, and numerical approach is presented here to get reliable and efficient estimation of life under fatigue loading.

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Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

“…Integral spar geometry and FE mesh with initial penny‐shaped cracks (blue circles) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

“…Cracks after the 8th step (A) and 1st crack after 22nd step of propagation (B) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Application Of Xfem To Fatigue Crack Growth Simulationmentioning

confidence: 99%

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Computational fracture mechanics: An overview from early efforts to recent achievements

Sedmak

2018

Fatigue Fract Eng Mat Struct

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“…Shear modulus of elasticity of the material is taken 30 GPa. This would be attributed to one of the widely used materials such as an aluminum alloy for the aircraft box beams (Jr Starke and Staley, 1996; Elwaib et al , 2018; Grabovic et al , 2019). Figure 4 refers the determination of shear flows, stiffener loads and angle of twist per unit length.…”

Section: Methodsmentioning

confidence: 99%

Computation of dimensional variations on the structural analysis of multi-cell aircraft box beams with python scripting

Yavuz

2021

AEAT

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Purpose Python codes are developed for the versatile structural analysis on a 3 spar multi-cell box beam by means of idealization approach. Design/methodology/approach Shear flow distribution, stiffener loads, location of shear center and location of geometric center are computed via numpy module. Data visualization is performed by using Matplotlib module. Findings Python scripts are developed for the structural analysis of multi-cell box beams in lieu of long hand solutions. In-house developed python codes are made available to be used with finite element analysis for verification purposes. Originality/value The use of python scripts for the structural analysis provides prompt visualization, especially once dimensional variations are concerned in the frame of aircraft structural design. The developed python scripts would serve as a practical tool that is widely applicable to various multi-cell wing boxes for stiffness purposes. This would be further extended to the structural integrity problems to cover the effect of gaps and/or cut-outs in shear flow distribution in box-beams.

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