Effect of thermal residual stress on the crack path in adhesively bonded joints

Daghyani, Hamid Reza; Ye, Lin; W., Y.

doi:10.1007/bf00687277

Cited by 35 publications

(10 citation statements)

References 16 publications

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“…Similar to deformation of a substrate, in-planes stresses can be introduced in a coating due to a mismatch in thermal expansion coefficients between the polymer and the metal substrate. Thus in-plane residual stresses of thermal origin were measured with the curvature based techniques [8][9][10][11], double cantilever test [2,[12][13][14] and other less common experimental methods [15][16][17]. High compressive stresses are also found in coatings deposited on various substrates.…”

Section: E-mail Address: Afedorov@rugnl (Av Fedorov)mentioning

confidence: 99%

Degradation and recovery of adhesion properties of deformed metal–polymer interfaces studied by laser induced delamination

Федоров¹,

Tijum²,

Vellinga³

et al. 2007

Progress in Organic Coatings

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Degradation and recovery of adhesion properties of deformed metal-polymer interfaces studied by laser induced delamination Fedorov, A. V.; van Tijum, R.; Vellinga, W. -P.; De Hosson, J. Th. M. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. AbstractAdhesion properties of polymer coatings on metals are of great interest in various industrial applications, including packaging of food and drinks. Particular interest is focused on polymer-metal interfaces that are subjected to significant deformations during manufacturing process. In this work steel samples laminated with polyethylene terephthalate (PET) were subjected to uniaxial tensile deformations followed by annealing treatments. The measurements have demonstrated degradation of adhesion of the metal-polymer interface as the strain introduced by the deformation increased. Moreover, it was observed that within the geometry used in the experiments tensile deformations of the metal substrate introduced in-plane compressive stresses in the bulk of the coating. After applying a thermal treatment restoration of the adhesion has been achieved.Laser induced delamination technique was used to monitor the adhesion properties. In this technique a coating is subjected to a series of infrared laser pulses with a stepwise increase of intensity. Upon increasing the laser pulse intensity, the pressure which is formed inside the blisters reaches a critical value, resulting in further delamination of the coating. To process the experimental data an elastic model was developed. From the analysis of the experimental data the critical stresses required for the delamination and the practical work of adhesion are derived. The model accounts for the compressive in-plane stress present in the coating of the deformed samples.

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Section: E-mail Address: Afedorov@rugnl (Av Fedorov)mentioning

confidence: 99%

Degradation and recovery of adhesion properties of deformed metal–polymer interfaces studied by laser induced delamination

Федоров¹,

Tijum²,

Vellinga³

et al. 2007

Progress in Organic Coatings

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“…In nonlinear elastic materials, J represents the strain energy release rate. The energy based fracture mechanics failure criteria have been used to predict failure in adhesives [18][19][20][21][22][23][24][25]. This criterion dictates that failure will occur when the strain energy release rate equals the critical strain energy release rate.…”

Section: Introductionmentioning

confidence: 99%

Modelling Damage and Failure in Adhesive Joints Using A Combined XFEM-Cohesive Element Methodology

Mubashar

Ashcroft

Crocombe

2014

The Journal of Adhesion

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In recent years, cohesive elements based on the cohesive zone model (CZM) have been increasingly used within finite element analyses of adhesively bonded joints to predict failure. The cohesive element approach has advantages over fracture mechanics methods in that an initial crack doesn't have to be incorporated within the model. It is also capable of modelling crack propagation and representing material damage in a process zone ahead of the crack tip. However, the cohesive element approach requires the placement of special elements along the crack path and is, hence, less suited to situations where the exact crack path is not known a priori. The extended finite element method (XFEM) can be used to represent cracking within a finite element and hence removes the requirement to define crack paths or have an initial crack in the structure. In this paper a hybrid XFEM-cohesive element approach is used to model cracking in the fillet area using XFEM where the crack path is not known and then using cohesive elements to model crack and damage progression along the interface. The approach is applied to the case of an aluminium-epoxy single lap joint and is shown to be highly effective.

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“…The effects of thermal residual stresses on crack growth behaviour in adhesive joints have been studied previously [1,2] and residual stresses have been shown to have a negative effect on the fracture properties of an adhesive [3][4][5]. The factors that will influence the extent of the residual stresses include; volume changes during curing, material properties of the joint system, geometry of the constraining fixture and dimensional changes due to thermal contraction or expansion [2,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…The factors that will influence the extent of the residual stresses include; volume changes during curing, material properties of the joint system, geometry of the constraining fixture and dimensional changes due to thermal contraction or expansion [2,[6][7][8]. Residual stresses also play a critical role in premature failure in conjunction with fatigue, creep, wear and stress enhanced degradation.…”

Section: Introductionmentioning

confidence: 99%

Thermal residual stress analysis of epoxy bi-material laminates and bonded joints

Jumbo

Ashcroft

Crocombe

et al. 2010

International Journal of Adhesion and Adhesives

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Effect of thermal residual stress on the crack path in adhesively bonded joints

Cited by 35 publications

References 16 publications

Degradation and recovery of adhesion properties of deformed metal–polymer interfaces studied by laser induced delamination

Degradation and recovery of adhesion properties of deformed metal–polymer interfaces studied by laser induced delamination

Modelling Damage and Failure in Adhesive Joints Using A Combined XFEM-Cohesive Element Methodology

Thermal residual stress analysis of epoxy bi-material laminates and bonded joints

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