Crack propagation in buckling plates: test results and a simplified numerical approach

Bierbaum, Julia; Horst, Peter

doi:10.1108/17579861111183902

Cited by 4 publications

(6 citation statements)

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“…As Bierbaum and Horst (2011) showed and it was mentioned in the introduction, it turned out that this method yielded good results compared with tests performed by the authors up to a crack length which was in the order of a total crack length 2a ¼ 100 mm, which is in turn approximately half the width of the major buckle in these cases. This is true for different loading or initial crack conditions and plate thicknesses.…”

Section: Test Results and A Simplified Approachmentioning

confidence: 68%

“…A simplified approach of Bierbaum and Horst (2011) was based on a buckling analysis of the un-cracked specimen by finite elements (FEs). This analysis provides a s princ,max distribution of the elements' mid-plane along the cross-section where the crack was supposed to grow in a buckled shape.…”

Section: Test Results and A Simplified Approachmentioning

confidence: 99%

“…Bierbaum and Horst (2010) presented test results of cracks in aluminium panels under shear load saying that cracks always propagate perpendicular to maximum principle stress direction. Later they introduced a simplified approach, which was able to predict crack growth in a shear buckling plate up to a crack length, which had approximately half the size of the width of the main buckle (Bierbaum and Horst, 2011). This paper investigates the crack growth for larger cracks by means of the FEM in order to take into account the mutual interaction of cracks and buckling.…”

Section: Introductionmentioning

confidence: 99%

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Finite element crack propagation analysis of shear loaded buckling panels

Bierbaum

Horst

2013

International Journal of Structural Integrity

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Purpose -In former work, test results of cracks in aluminium panels under cyclic shear buckling showed that cracks in the tensile stress field of a buckle propagate. The main influencing factor for the crack growth rate is the maximum principle stress. A simplified approach for crack propagation analyses based on this finding showed limitations for application on larger cracks because it disregarded the increasing out-of-plane deformation for larger cracks as well as stress redistributions. The purpose of this paper is to improve the results of the simplified approach with the help of finite element method (FEM). Design/methodology/approach -An approach for crack propagation based on FEM is presented taking into account the mutual interaction of cracks and buckling. The finite element (FE) model, which is described in detail, respects the boundary conditions of the test-set-up. Different initial crack positions, loads and panel thicknesses are analyzed. Results of the stress intensity factors KI calculated by the ABAQUS w FE model provide a function which is used to run a crack propagation analysis based on Forman law. Findings -The results of the FE-based crack propagation solution are in good agreement with test results and improve the prediction of the simplified approach. It is not restricted in terms of panel thickness, crack position or applied shear load. Research limitations/implications -Limitations of the FE-based crack propagation solution compared to the experimental results are discussed. These are, the sensitivity of crack propagation analyses to initial crack length and deviations of the experimental settings from the ideal FE model. Originality/value -The interaction of cracks and buckling in aluminium shells is mainly disregarded both in research and industrial work, but can be of interest considering, accidental damages in fuselage side shells. Cracks propagate under shear load as it was shown in former work. The FE modeling of the tests presented in this paper proves the mutual interactions of crack propagation and buckling deformation.

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Section: Test Results and A Simplified Approachmentioning

confidence: 68%

Section: Test Results and A Simplified Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Finite element crack propagation analysis of shear loaded buckling panels

Bierbaum

Horst

2013

International Journal of Structural Integrity

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“…For concrete and steel, typical mechanisms include the following:cracking due to excessive external static or dynamic loadings (e.g., the material reaches critical levels of stress or strain);cracking due to repetitive or cyclic dynamic loading (e.g., fatigue);cracking due to stress concentrations (e.g., at the location of abrupt cross‐section changes, dents, grooves, inclusions, forging flaws, material porosities, voids, etc. ); andcracking due to buckling (e.g., ).…”

Section: Crack Classification Causes and Consequencesmentioning

confidence: 99%

Crack detection and characterization techniques-An overview

Yao

Tung

Glišić

2014

Struct. Control Health Monit.

222

123

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SUMMARY Crack occurrence and propagation are among critical factors that affect the performance and lifespan of civil infrastructures such as bridges, pipelines, and so on. As a consequence, numerous crack detection and characterization techniques have been researched and developed in the past decades in the areas of SHM and non‐destructive evaluation (NDE). The significant amount of performed studies and the large number of publications give rise to the need to systematize, condensate, and summarize this enormous effort. The aims of this paper are to summarize the knowledge about cracking and its sources, review both existing and emerging methods for crack detection and characterization, and identify the advantages and challenges for these methods. In general, this paper identifies two sensing approaches (direct and indirect) and two data analysis approaches (model‐based and model‐free or data‐driven) along with a range of associated technologies. The advantages and challenges of each approach and technology are discussed and summarized, and the future research needs are identified. This paper is intended to serve as a reference for researchers who are interested in crack detection and characterization as well as for those who are generally interested in SHM and NDE. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Recently, several numerical and experimental studies were carried out using the finite element method to analyze buckling strength for cracked panels under different load cases. 4,5 The critical load multiplier may be determined by varying certain parameters, such as the length of the crack, the Poisson's ratio, and the orientation of the crack. AV Raviprakash et al 6 worked on the critical buckling load for a thin square plate with center or edge cracks, and subjected to axial compression.…”

Section: Introductionmentioning

confidence: 99%

Numerical buckling analysis of cracked Bi-material thin plates

Hamouda¹,

Tani

Tamine³

2014

Advances in Mechanical Engineering

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The aim of this present study is to analyze numerically the buckling behavior of cracked thin bi-material structures subjected to compression and tensile stresses and this, by considering the evolution of crack lengths and its orientations at the interface. This research work allows to quantify numerically the buckling phenomenon which can affects the thin plates for both cases, with and without interface crack especially, when the plate is subjected to tensile loading. The main important results of numerical simulations show that for the case of compression loading, the presence of interfacial crack increases significantly the strength of the thin plate against buckling phenomena. In the other hand, thin crack plates buckling is more pronounced when the crack tip is close to the interface (θ = 90°, θ = 75°). Finally, unlike to the case of homogeneous thin plates, the incorporation of bi-material aspect in thin plates design offers more strength against buckling either for compression or tensile loading.

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Crack propagation in buckling plates: test results and a simplified numerical approach

Cited by 4 publications

References 5 publications

Finite element crack propagation analysis of shear loaded buckling panels

Finite element crack propagation analysis of shear loaded buckling panels

Crack detection and characterization techniques-An overview

Numerical buckling analysis of cracked Bi-material thin plates

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