XFEM buckling analysis of cracked composite plates

Nasirmanesh, Amir; Mohammadi, Soheil

doi:10.1016/j.compstruct.2015.05.013

Cited by 45 publications

(14 citation statements)

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“…Actually, it is a capability that is put into the conventional FEM mesh, even if the dam structure begins to crack or not. Till date, XFEM has widely used to identify the problems, including fracture analysis of concrete dams (Pan et al., 2011; Wang et al., 2015a; Zhang et al., 2013), damage detection using optimization algorithms (Agathos et al., 2016; Chatzi et al., 2011; Sun et al., 2013, 2014) or with cubic splines (Jung and Taciroglu, 2014), isogeometric analysis (Bhardwaj et al., 2015), hydraulic fracture (Wang et al., 2015b), and buckling analysis (Nasirmanesh and Mohammadi, 2015).…”

Section: Introductionmentioning

confidence: 99%

Damage detection based on system identification of concrete dams using an extended finite element–wavelet transform coupled procedure

Pirboudaghi

Tarinejad

Alami

2017

Journal of Vibration and Control

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The aim of the present study is to propose a procedure for seismic cracking identification of concrete dams using a coupling of the extended finite element method (XFEM) based on cohesive crack segments (XFEM-COH) and continuous wavelet transform (CWT). First, the dam is numerically modeled using the traditional finite element method (FEM). Then, cracking capability is added to the dam structure by applying the XFEM-COH for concrete material. The results of both the methods under the seismic excitation have been compared and identified to damage detection purposes. In spite of predefined damage in some of the structural health monitoring (SHM) techniques, there is an advantage in the XFEM model where the whole dam structure is potentially under damage risk without initial crack, and may not crack at all. Finally, in order to evaluate any change in the system, that is, specification of any probable crack effects and nonlinear behavior, the structural modal parameters and their variation have been investigated using system identification based on the CWT. The results show that the extended finite element–wavelet transform procedure has high ability for the online SHM of concrete dams that by analysis of its results, the history of physical changes, cracking initiation time, and exact damage localization have been performed from comparing the intact (FEM) and damaged (XFEM) modal parameters of the structural response. In addition, any small change in the system is observable while the final crack profile and performance simulation of the dam body under strong seismic excitations have obtained.

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Section: Introductionmentioning

confidence: 99%

Damage detection based on system identification of concrete dams using an extended finite element–wavelet transform coupled procedure

Pirboudaghi

Tarinejad

Alami

2017

Journal of Vibration and Control

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“…This method allows determining crack propagation regardless of the size of the generated finite element mesh. There are many studies [37][38][39][40][41][42][43] on crack propagation processes and the application of the xFEM method. They confirm that the use of this method enables effective determination of critical areas of structures depending on the defined physical processes consistent with real phenomena, which leads to the loss of initial mechanical properties.…”

Section: Numerical Modelmentioning

confidence: 99%

Bending Behavior of Lightweight Wood-Based Sandwich Beams with Auxetic Cellular Core

Peliński

Smardzewski

2020

Polymers

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The work concerns a three-point bending test of beams made of plywood, high density fibre boards, cardboard, and wood-epoxy mass. The goal of the investigation was to determine the effect of thickness and type of wood-based facings on stiffness, strength, ability to absorb, and dissipate the energy of sandwich beams with an auxetic core. The cognitive goal of the work was to demonstrate the possibility of using recycled materials for facings and cores instead of popular wood composites. Experimental studies and numerical calculations were performed on correctly calibrated models. Experimental studies have shown that the beams with HDF facings (E = 1528 MPa, MOR = 12.61 MPa) and plywood facings (E = 1248–1395 MPa, MOR = 8.34–10.40 MPa) have the most favourable mechanical properties. Beams with plywood facings also have a good ability to absorb energy (1.380–1.746 J), but, in this respect, the beams manufactured of HDF (2.223 J) exhibited better capacity. The use of an auxetic core and facings of plywood and cardboard significantly reduces the amount of dissipated energy (0.0093 J, 0.0067 J). Therefore, this type of structures can be used for modeling beams carrying high deflections.

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“…This approach has allowed engineers to achieve more accurate displacement solutions at the crack surface using coarser meshes than conventional finite element formulations and also liberated crack growth simulations from the requirement to remesh as the crack may pass through elements. This approach was named extended finite element method (XFEM), and the development of enrichment functions remains a topic of considerable interest [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

An extended boundary element method formulation for the direct calculation of the stress intensity factors in fully anisotropic materials

Hattori

Alatawi

Trevelyan

2016

Numerical Meth Engineering

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(2017) 'An extended boundary element method formulation for the direct calculation of the stress intensity factors in fully anisotropic materials.', International journal for numerical methods in engineering., 109 (7). pp. 965-981. Further information on publisher's website:https://doi.org/10.1002/nme.5311Publisher's copyright statement: This is the accepted version of the following article: Hattori, G., Alatawi, I.A. Trevelyan, J. (2017). An extended boundary element method formulation for the direct calculation of stress intensity factors in fully anisotropic materials. International Journal for Numerical Methods in Engineering, 109(7): 965-981, which has been published in nal form at https://doi.org/10.1002/nme.5311. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.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. ABSTRACTWe propose a formulation for linear elastic fracture mechanics (LEFM) in which the stress intensity factors (SIF) are found directly from the solution vector of an extended boundary element method (XBEM) formulation. The enrichment is embedded in the BEM formulation, rather than adding new degrees of freedom for each enriched node. Therefore, a very limited number of new degrees of freedom is added to the problem, which contributes to preserving the conditioning of the linear system of equations. The Stroh formalism is used to provide BEM fundamental solutions for any degree of anisotropy, and these are used for both conventional and enriched degrees of freedom. Several numerical examples are shown with benchmark solutions to validate the proposed method.

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XFEM buckling analysis of cracked composite plates

Cited by 45 publications

References 46 publications

Damage detection based on system identification of concrete dams using an extended finite element–wavelet transform coupled procedure

Damage detection based on system identification of concrete dams using an extended finite element–wavelet transform coupled procedure

Bending Behavior of Lightweight Wood-Based Sandwich Beams with Auxetic Cellular Core

An extended boundary element method formulation for the direct calculation of the stress intensity factors in fully anisotropic materials

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