The prediction of dynamic fracture evolution in PMMA using a cohesive zone model

Murphy, Neal

doi:10.1016/j.engfracmech.2004.08.001

Cited by 52 publications

(29 citation statements)

References 26 publications

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“…This is particularly the case for problems with single, slowly propagating cracks. For rapid crack propagation in brittle materials the shape of the CZM has been found to play a much stronger role [31]. A number of studies on ductile failure due to void growth strongly indicate that these two parameters are stress state dependent, e.g.…”

Section: Constraint Dependent Czmmentioning

confidence: 99%

Effects of bond gap thickness on the fracture of nano-toughened epoxy adhesive joints

Cooper

Ivanković

Karač

et al. 2012

Polymer

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Publication information Polymer, 53 (24): 5540-5553Publisher Elsevier Item record/more information http://hdl.handle.net/10197/5950 Publisher's statementThis is the author's version of a work that was accepted for publication in Polymer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Polymer (53, 24, (2012)) DOI: http://dx.doi/org/10.1016/j.polymer.2012.09.049Publisher's version (DOI) http://dx.doi.org/10.1016/j.polymer.2012.09.049 NotesOther RMSIDs: 316516744Some rights reserved. For more information, please see the item record link above. Bosnia and Herzegovina AbstractThe current work is a combined experimental--numerical study of the fracture behaviour of a nano--toughened, structural epoxy adhesive. The mode I fracture toughness of the adhesive is measured using tapered double--cantilever beam ( IntroductionThe accurate and efficient determination of the fracture toughness and the associated fracture mechanisms of a structural adhesive are of fundamental importance to adhesive manufacturers and end users alike. The ability to predict the behaviour of such joints can lead to better designs, increased performance, reduced costs and enhanced safety. Better understanding of the structure--property relationship will ultimately lead towards improved adhesives with tailored properties. However, the behaviour of joints in real structures is difficult to predict since their behaviour, including the failure mechanisms, are complex to measure and model. The testing of prototypes and trial structures is costly and time--consuming. Consequently, there has been a growing motivation for the development of theoretical models for predicting the damage and failure of adhesive joints. These models require geometry independent material parameters, which are usually obtained from tests with simpler geometries and subsequently applied in the analysis of more complexgeometries.An important parameter in adhesive joint design is the bond gap thickness (BGT) which needs to be accurately controlled in order to obtain a consistent and reliable joint strength. In the current work, the mode I fracture behaviour of a nano--toughened, structural epoxy adhesive was examined using low--rate TDCB tests with various bond gap thicknesses. The Application of the CZM to adhesive jointsCohesive zone models are widely used to model the fracture of adhesive joints. In general, the substrates are modelled as elastic--plastic continua while two main approaches are adopted for the modelling of the adhesive layer: i) CZM is used to represent the entire adhesive layer, ii) the adhesive layer is modelled as a continuum while CZM is used to describe the local fracture process. A number of authors have used a single row of cohesive zone elements to represent the adhesive layer, e.g. ...

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Section: Constraint Dependent Czmmentioning

confidence: 99%

Effects of bond gap thickness on the fracture of nano-toughened epoxy adhesive joints

Cooper

Ivanković

Karač

et al. 2012

Polymer

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“…The arbitrary crack propagation model implemented allows prediction of crack propagation along internal control volume faces [19]. An internal con- trol volume face at which the failure criterion is satisfied is turned into a pair of cohesive zone boundary faces.…”

Section: Finite Volume Analysismentioning

confidence: 99%

“…The method was first developed for the solution of solid mechanics problems by Demirdzić and co-workers [10][11][12][13][14]. Ivanković and co-workers have applied the FV method successfully to the solution of both fracture problems [15][16][17][18][19] and fluid structure interaction problems [20,21].…”

Section: Introductionmentioning

confidence: 99%

Analysis of two-phase ceramic composites using micromechanical models

Alveen

McNamara

Carolan

et al. 2014

Computational Materials Science

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Micromechanical models of two-phase ceramic composites are created using a modified Voronoi tessellation approach. These representative Finite Volume (FV) microstructures are used to investigate the role of microstructure on fracture of advanced ceramics. An arbitrary crack propagation model using a cell-centred finite volume based method is implemented. In particular the effect of matrix content is examined. It is shown that the underlying microstructure significantly affects the local stress and strain distributions for a two-phase ceramic containing hard particles in a softer matrix. Simulation results indicate that an increase in the volume fraction of these hard grains leads to an increase in strength of the composite material. Furthermore, it is found that the homogeneity of the microstructure affects the overall strength.

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“…In a recent work, Murphy and Ivankovic [12] presented results of the crack propagation speed in PMMA plates 8 mm thick with a small notched edge in tension.…”

Section: Introductionmentioning

confidence: 99%

Crack-front propagation during three-point-bending tests of polymethyl-methacrylate beams

Loya¹,

Villa²,

Fernández-Sáez³

2010

Polymer Testing

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a b s t r a c tCrack front evolution in polymethyl methacrylate (PMMA) beams was measured during quasi static three point bending tests performed on a universal testing machine. A high speed camera was used to record the crack front propagation process through the specimen thickness and to determine the instantaneous crack length during the test, considering the effect of different initial notch lengths and loading point displacement rates. The average steady crack propagation speed was also calculated and correlated with the stored elastic energy, and these results have been compared with those reported by other authors for different test conditions. This experimental technique appears to be suitable to determine the influence of the test conditions on the crack propagation speed of PMMA specimens.

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The prediction of dynamic fracture evolution in PMMA using a cohesive zone model

Cited by 52 publications

References 26 publications

Effects of bond gap thickness on the fracture of nano-toughened epoxy adhesive joints

Effects of bond gap thickness on the fracture of nano-toughened epoxy adhesive joints

Analysis of two-phase ceramic composites using micromechanical models

Crack-front propagation during three-point-bending tests of polymethyl-methacrylate beams

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