The application of the dual boundary element method to the analysis of cracked stiffened panels

Salgado, N.K.; Aliabadi, M.H.

doi:10.1016/0013-7944(95)00111-5

Cited by 36 publications

(27 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Once the crack has been extended and a re-analysis performed to correct the propagation angle, the increment length can be corrected as well to take into account the variation in crack tip stress intensity factors. The predictor-corrector scheme of Salgado and Aliabadi [9] has been implemented in the present work. The procedure is adapted in the present work so that corrections for propagation angle and increment length are conducted in the same algorithm.…”

Section: Algorithm For Simulation Of Multi-site Damagementioning

confidence: 99%

“…The Dual Boundary Element Method (DBEM) (see Hong & Chen [5], Portela et al [6], and Chen & Hong [7]) addresses this by defining separate equations on collocated surfaces of the crack, one a function of displacement and the other of traction, giving a non-singular system of equations which can be solved. The method has been applied to both single and multiple crack problems [6,8,9,10,11]. This paper presents an algorithm for the application of the DBEM to the incremental analysis of multi-site damage crack growth problems.…”

Section: Introductionmentioning

confidence: 99%

“…Fatigue analysis based on Paris law is adopted for simplicity, although other crack growth laws could easily be substituted. Further correction for increment length is implemented based on Salgado et al [9], and new growth criteria developed to control the extensions of cracks where a range of growth rates are present. Examples for multi-site damage fatigue problems are presented including single crack examples for validation and a series of multi-site damage applications with relevance to modern engineering structures.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Boundary element simulation of fatigue crack growth in multi-site damage

Price

Trevelyan

2014

Engineering Analysis with Boundary Elements

View full text Add to dashboard Cite

(2014) 'Boundary element simulation of fatigue crack growth in multi-site damage.', Engineering analysis with boundary elements., 43 . pp. 67-75. Further information on publisher's website:http://dx.doi.org/10. 1016/j.enganabound.2014.03.002 Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Engineering Analysis with Boundary Elements. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Engineering Analysis with Boundary Elements, 43, 2014, 10.1016/j.enganabound.2014.03.002. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThis paper presents an efficient and automatic scheme for modelling the growth of multiple cracks through a two-dimensional domain under fatigue loading based on linear elastic fracture mechanics. The dual boundary element method is applied to perform an analysis of the cracked domain and the J-integral technique is used to compute stress intensity factors. Incremental crack propagation directions are evaluated using the maximum principal stress criterion and a combined predictor-corrector algorithm implemented for propagation angle and increment length. Criteria are presented to control the mesh used on the slower growing cracks in the domain, improving computational efficiency and accuracy by the use of virtual crack tips to avoid the need for severe mesh grading. Results are presented for several geometries with multi-site damage, and sensitivity to incremental crack length is investigated. The scheme demonstrates considerable advantages over the finite element method for this application due to simplicity of meshing, and over other boundary element formulations for modelling domains with large ranges of crack growth rates.

show abstract

Section: Algorithm For Simulation Of Multi-site Damagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Boundary element simulation of fatigue crack growth in multi-site damage

Price

Trevelyan

2014

Engineering Analysis with Boundary Elements

View full text Add to dashboard Cite

show abstract

“…Following Salgado and Aliabadi [52], each rivet is idealized as an attached point acting on the plates as an unknown domain point forces. Contact between the surfaces of the plates is not considered; thus they are modelled separately and they interact through unknown forces at rivet points.…”

Section: Boundary Element Formulation For Riveted Structuresmentioning

confidence: 99%

“…The stiffeners can be attached to the sheets with rivets. BEM formulation for two-dimensional riveted panels with cracks can be found in [52], while applications to riveted repairs in [54] and [70]. Widagdoo and Aliabadi in [75] analyzed the effect of different materials for composite riveted patches.…”

Section: Introductionmentioning

confidence: 99%

Boundary element analysis of stiffened panels with repair patches

Pisa¹,

Aliabadi²

2015

Engineering Analysis with Boundary Elements

Self Cite

View full text Add to dashboard Cite

In this paper a boundary element method for analysis of fractured stiffened panels repaired with riveted or adhesively bonded patches is presented. In order to achieve such a formulation, several boundary element formulations involving the membrane and bending of displacement, and, stress resultants are coupled together to analyse the model. The multi-region formulation is used to simulate the stiffeners, which are modelled as an assembly. They are then connected to the sheets to form the stiffened panels by means of a rivet formulation. The dual boundary element method is used to simulate the presence of cracks, and the patches, treated as independent plates, are joined to the panel either with rivets or adhesive. A boundary element formulation for adhesive bonding is implemented to model the adhesively bonded patches. The Crack Opening Displacements (COD) method and the Jintegral are implemented to evalute the required fracture parameters. Examples presented include a wing box with a three spar section, with fully stiffened skin, and, the skin is considered to have a crack and a repair patch is used on top of the crack to stop its growth.Response to Reviewers: Thank you for highlighting the missing references and figures numbers as well as certain typo's. We have corrected all the highlighted items.Thank you for highlighting the missing references and figures numbers as well as certain typo's. We have corrected all the highlighted items. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 Detailed Response to Reviewers AbstractIn this paper a boundary element method for analysis of fractured stiffened panels repaired with riveted or adhesively bonded patches is presented. In order to achieve such a formulation, several boundary element formulations involving the membrane and bending of displacement, and, stress resultants are coupled together to analyse the model. The multi-region formulation is used to simulate the stiffeners, which are modelled as an assembly. They are then connected to the sheets to form the stiffened panels by means of a rivet formulation. The dual boundary element method is used to simulate the presence of cracks, and the patches, treated as independent plates, are joined to the panel either with rivets or adhesive. A boundary element formulation for adhesive bonding is implemented to model the adhesively bonded patches. The Crack Opening Displacements (COD) method and the J-integral are implemented to evalute the required fracture parameters. Examples presented include a wing box with a three spar section, with fully stiffened skin, and, the skin is considered to have a crack and a repair patch is used on top of the crack to stop its growth.

show abstract

The boundary element analysis of cracked stiffened sheets, reinforced by adhesively bonded patches

Salgado

Aliabadi

1998

Int. J. Numer. Meth. Engng.

View full text Add to dashboard Cite

This paper presents a formulation based on the Dual Boundary Element Method and on the Dual Reciprocity Method for the analysis of thin cracked metal sheets to which thin metal patches and stiffeners are adhesively bonded.The stiffened cracked sheet is modelled with the Dual Boundary Element Method. Adhesive shear stresses are modelled as action-reaction body forces exchanged by the sheet and patches. The Dual Reciprocity Method is used to avoid the discretization of the patches attachment domain into internal cells.Several examples are presented to demonstrate the efficiency and robustness of the method developed. The examples include sheets with embedded or edge cracks, stiffened or not, to which single or double patches are adhesively bonded.1998 John Wiley & Sons, Ltd.

show abstract

The application of the dual boundary element method to the analysis of cracked stiffened panels

Cited by 36 publications

References 12 publications

Boundary element simulation of fatigue crack growth in multi-site damage

Boundary element simulation of fatigue crack growth in multi-site damage

Boundary element analysis of stiffened panels with repair patches

The boundary element analysis of cracked stiffened sheets, reinforced by adhesively bonded patches

Contact Info

Product

Resources

About