Application of finite element analysis techniques for predicting crack propagation in lugs

Gencoz, O.; Göranson, Ulf; Merrill, Robert

doi:10.1016/0142-1123(80)90014-6

Cited by 23 publications

(9 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To this end a better representation of the load distribution will be attempted. Gencoz et al [16], in photoelasticity experiments, observed that the cosine load distribution, as used before, does not produce an adequate stress distribution as compared to the photoelasticity results. In a trialand-error iteration procedure, they obtained a formula for the load distribution that resulted in a better representation of the stress distribution.…”

Section: Finite Element Methodsmentioning

confidence: 94%

On the methodology of fitting design

Bismarck-Nasr

Pinto

2004

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

The methodology used in the classical methods of design of single pin fittings is reviewed. An alternative for the design of these structural elements using a finite element method is presented. The proposed methodology removes the constraints on the geometry and materials imposed in the classical methods of analysis. The complications of the application of the loading in the finite element method to the fitting sizing problem are discussed in detail and a conclusive procedure of design is presented. Several numerical examples are given and the results obtained are discussed and compared with the classical methods of design.

show abstract

Section: Finite Element Methodsmentioning

confidence: 94%

On the methodology of fitting design

Bismarck-Nasr

Pinto

2004

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

show abstract

“…Using the same approach as in [7], [8] and [9] the crack geometry was considered equivalent to an edge-crack in a semi-infinite plate as the crack length approached zero. As a function of the stress at the crack initiation site, this configuration yields a geometry factor of 1.1215.…”

Section: Afgrow Implementationmentioning

confidence: 99%

Experimental Validation Of Stress Intensity Factor Solutions For The Pin Loaded Lug

Child¹,

Moyle²,

Grandt

2009

ICAF 2009, Bridging the Gap Between Theory and Operational Practice

View full text Add to dashboard Cite

Predicting crack growth behaviour is an important element of managing the structural integrity of aircraft fleets. It is common for fleet managers to employ software packages, such as AFGROW, to automate the prediction of crack growth behaviour. Stress intensity factor solutions employed in these software packages must be appropriately verified in order for results to be utilised in structural integrity management. Two independent research programs were conducted at Purdue University to review stress intensity factor solutions for cracked, pin-loaded lugs. The purpose of the research was to experimentally validate stress intensity factor solutions derived from representative StressCheck® Finite Element Models (FEMs). Component fatigue tests were conducted on corner and through cracked, pin loaded aluminium lugs and non-dimensional stress intensity factor (geometry factor) solutions calculated utilising a backtracking method. For the through crack configuration, experimental and StressCheck® geometry factors closely correlated and were an improvement to the solutions provided in AFGROW at the time. Based on the results of this research, StressCheck® pin-loaded lug geometry factors have since been incorporated into the AFGROW software. In the case of the corner crack configuration, the correlation between experimental and StressCheck® results was dependant on the choice of pin-M. Bos (ed.), ICAF 2009, Bridging the Gap between Theory and Operational Practice, 871-898.

show abstract

“…Aberson and Anderson [17] used a special crack-tip singularity element to compute the stress intensity factors for a crack in a nonsymmetrical aircraft lug of an engine pylon. Using two dimensional FEM, Gencoz et al [18] reproduced the stresses observed in photoelastic models of the lugs with a special stress distribution. Pin-loaded lugs were analyzed in the presence of cracks emanating from circular holes of the lugs by Narayana et al [19].They used finite element model with special singular six-node quadrilateral elements at the crack tip.…”

Section: Introductionmentioning

confidence: 96%

“…Many analytical and numerical efforts are performed to obtain SIF for different crack configurations such as elliptical cracks, through-thickness cracks, elliptical corner cracks for infinite, finite plates as well as attachment lugs [10][11][12][13][14][15][16][17][18][19][20][21][22]. Raju and Newman [10][11][12][13] evaluated SIF for different corner cracks using some analytical solutions.…”

Section: Introductionmentioning

confidence: 99%