Crack growth analyses and correlations for attachment lugs

Kathiresan, K.; Brussat, T. R.; Rudd, JL

doi:10.2514/3.45207

Cited by 14 publications

(10 citation statements)

References 9 publications

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“…SIFs here obtained are compatible with those reported in Refs. [6,8]. It is obvious that the results of the present FE model are compatible with analytical and FE results of mentioned references and the maximum difference is about 4 percent.…”

Section: Verification Of Fem Resultssupporting

confidence: 88%

“…The effect of lug and crack parameters on the stress distributions and SIF were determined in both cases. Kathiresan et al [6] obtained SIF solutions for through cracks in lugs using the Green's function method and correction factors. Narayana et al [7] analyzed the presence of cracks in metallic and composite lugs using finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, dimensionless SIFs (K N =K I /( br √ a)) under a real pin loading with frictionless contact are compared with those of Ref [6]. for Ro/Ri=2.25 , a/c = 1 and 0.2≤c/B≤0.8 for the surface and the deepest points of the crack, listed in Tab.…”

mentioning

confidence: 99%

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Novel weight functions and stress intensity factors for quarterelliptical cracks in lug attachments

Akbari¹,

Nabavi

Moayeri³

2018

Frattura Ed Integrità Strutturale

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In this paper, a general weight function is developed to calculate the stress intensity factors (SIFs) for quarter-elliptical cracks in a wide range of lug attachment family. For this purpose, a series of finite element analyses are performed. Finally, using this unique extracted weight function, the influence of the pin loading model and crack parameters (aspect ratio and relative depth of the quarter-elliptical crack) on the SIFs is evaluated in the cracked lug attachments. The results of the present work are compared with some data available in the literature, and the agreement is satisfactory.

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Section: Verification Of Fem Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Novel weight functions and stress intensity factors for quarterelliptical cracks in lug attachments

Akbari¹,

Nabavi

Moayeri³

2018

Frattura Ed Integrità Strutturale

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“…5 and then grows along the circumferential and thickness directions with each different growth rate. In the analysis of corner crack growth [60], the crack growth rate along the circumferential direction is slower than along the thickness direction. The crack grows from a corner crack in the region of AA'B as a transitional crack in the region of A'A"B'B to a through-crack beyond the line CD as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Fatigue Crack Growth Behaviour of Sm45c Steel Under Cyclic Mode I With Superimposed Static Mode Ii Loadings

You

Lee

1997

Fatigue Fract Eng Mat Struct

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The practical applications of studies related to constant amplitude mode I loading are somewhat limited, since mode I crack growth is often influenced by mode I1 (sliding mode) or mode I11 (tearing mode) in industrial situations. For these cases, criteria, rules, and laws have to be worked out and verified by experiments. However, it is very difficult to evaluate mixed-mode fatigue cracking due to crack surface interference, crack closure, crack branching, etc. This paper, which defines the length of a branched crack as an effective slant crack with a length equal to the distance between the two crack tips, explains the influences of crack surface interference by introducing concepts of adhesive wear and scrutinizes some related researches on mixed-mode crack growth behaviour. Additionally an effective stress intensity factor range is described which considers crack closure and crack surface interference and is verified with crack growth tests under mode I fatigue loading and cyclic mode I with a superimposed static mode I1 loading. NOMENCLATURE 2a,,, 2a, = effective crack length and precrack length AK,, K,, = mode I SIF range and static mode I1 SIF, respectively A,,, = contact area under cyclic mode I with superimposed static mode I1 loading AK,,, AKeff = equivalent and effective stress intensity factor ranges, respectively K,,,,, Kll,lock = crack opening and crack locking stress intensity factors, respectively U = mode I crack opening ratio oad = adhesion strength

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“…Due to the requirements of application, lugs have been extensively studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] for stress intensity factors (K) using various methods involving numerical, analytical and experimental approaches.…”

Section: Introductionmentioning

confidence: 99%

Weight functions and stress intensity factors for the single crack round-ended straight lug

Wang

1992

Int J Fract

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Investigations were performed for the round-ended straight attachment lug with a single crack emanating from the hole with the weight function method. The weight functions, covering the geometries from W/D = 1.5 to W/D = 4.0, were generated from the results obtained with a boundary element method using the approximate weight function technique. The results have been given both in the form of analytical weight functions and tabulated dimensionless stress intensity factors for simple normalized powers of the crack line loading. This is a simple straight forward procedure to calculate stress intensity factors once the crack line loading is approximated by a polynomial. The present method is also valid for deriving stress intensity factors and weight functions for general crack configurations.

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Crack growth analyses and correlations for attachment lugs

Cited by 14 publications

References 9 publications

Novel weight functions and stress intensity factors for quarterelliptical cracks in lug attachments

Novel weight functions and stress intensity factors for quarterelliptical cracks in lug attachments

Fatigue Crack Growth Behaviour of Sm45c Steel Under Cyclic Mode I With Superimposed Static Mode Ii Loadings

Weight functions and stress intensity factors for the single crack round-ended straight lug

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