Experimental application and enhancement of the XFEM–GA algorithm for the detection of flaws in structures

Chatzi, Eleni; Hiriyur, Badri; Waisman, Haim; Smyth, Andrew W.

doi:10.1016/j.compstruc.2010.12.014

Cited by 91 publications

(51 citation statements)

References 34 publications

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“…Types of non-destructive testing include visual inspection, ultrasound and magnetic field tests, etc. However, these procedural initiatives require an estimation of the damage location before performing the test to avoid having to inspect the whole structure and are not applicable to inaccessible members in the structure [1][2][3]7,8]. To overcome these limitations, another type of non-destructive technique which can be used to assess structural damage in situ involves the measurement of vibration characteristics, namely the natural frequencies and mode shapes.…”

Section: Introductionmentioning

confidence: 98%

“…Non-destructive testing can be performed in a scheduled and repetitive manner as required, to detect cracks or defects in structural elements. Examples of these elements are aircraft components suffering barely visible impact damage, and bridge and building structures suffering earthquake damage, amongst others [1][2][3][4][5][6]. Types of non-destructive testing include visual inspection, ultrasound and magnetic field tests, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Crack localisation in frames using natural frequency degradations

Labib

Kennedy

Featherston

2015

Computers & Structures

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Crack localisation in frames using natural frequency degradations

Labib

Kennedy

Featherston

2015

Computers & Structures

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“…Namely among them are Belytschko et al (2003), Sukumar and Prevost (2003), Bellec and Dolbow (2003), Sukumar et al (2005), Belytschko et al (2005), Asadpoure et al (2006a, b), Sladek et al (2006), Asadpoure and Mohammadi (2007), Belytschko and Gracie (2007), Tabarraei and Sukumar (2008), Giner et al (2009), Abdelaziz and Hamouine (2008), Ebrahimi et al (2008), Shibanuma and Utsunomiya (2009), Richardson et al (2009), Liang et al (2010), Hattori et al (2012), Mousavi and Sukumar (2010), Ghorashi et al (2011) and Chatzi et al (2011).…”

Section: Introductionmentioning

confidence: 97%

Stochastic fracture analysis of laminated composite plate with arbitrary cracks using X-FEM

Lal

Palekar

2015

Int J Mech Mater Des

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In this paper, second order statistics of mixed mode stress intensity factors (MSIFs) and crack propagation analysis of the symmetric angle ply laminated composite plate with through thickness arbitrary curve cracks subjected to tensile and shear stress is presented. The fracture behaviour is analysed using extended finite element method (X-FEM). The cracks like line, semi elliptical, semi circular and arbitrary curves are considered for the detailed numerical study. The material properties, lamination angle, loading, crack width and crack depth are modelled as independent, combine uncorrelated and correlated input random Gaussian variables. The interaction integral (M-integral) is adopted for calculating the MSIFs. The second order perturbation technique and Monte Carlo simulations are proposed to obtain the mean and coefficient of variance of MSIFs by random change in input system parameters. This work signifies the accurate and realistic evaluation of fracture response by handling the various levels of uncertainties. The effect of crack propagation on MSIFs using tensile and shear stresses using global tracking algorithm is also highlighted.

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“…XFEM offers the advantage of maintaining a fixed background mesh irrespective of the trial flaw configurations. Waisman et al (2010), Chatzi et al (2011) and Rabinovich et al (2009Rabinovich et al ( , 2007 combined XFEM with GA. The solution of the crack identification problem by GA requires the forward problem being solved many times for different crack configurations.…”

Section: Introductionmentioning

confidence: 98%

A dynamic XFEM formulation for crack identification

Zhang

Wang

Lahmer

et al. 2015

Int J Mech Mater Des

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Nelder-Mead (NM) and Quasi-Newton (QN) optimization methods are used for the numerical solution of crack identification problems in elastodynamics. Fracture is modeled by the eXtended Finite Element Method. The Newmark-b method with Rayleigh damping is employed for the time integration. The effects of various dynamical test loads on the crack identification are investigated. For a timeharmonic excitation with a single frequency and a short-duration signal measured along part of the external boundary, the crack is detected through the solution of an inverse time-dependent problem. Compared to the static load, we show that the dynamic loads are more effective for crack detection problems. Moreover, we tested different dynamic loads and find that NM method works more efficient under the harmonic load than the pounding load while the QN method achieves almost the same results for both load types.

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Experimental application and enhancement of the XFEM–GA algorithm for the detection of flaws in structures

Cited by 91 publications

References 34 publications

Crack localisation in frames using natural frequency degradations

Crack localisation in frames using natural frequency degradations

Stochastic fracture analysis of laminated composite plate with arbitrary cracks using X-FEM

A dynamic XFEM formulation for crack identification

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