Analysis of adhesive-bonded single-lap joint with an interfacial crack and a void

Chadegani, Alireza; Batra, R.C.

doi:10.1016/j.ijadhadh.2011.02.006

Cited by 53 publications

(13 citation statements)

References 37 publications

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“…, and Gc ¼ 0.166 N / m. 6 The inhomogeneity in the distribution of interfacial tractions, singular at the corners [37][38][39][40] triggered by the free-edges of the elastomer layer and the adjoining traction-free portion of the adherend likely acts as the perturbation to the homogeneous solution over the central region. If horizontal displacements at the free edges of the interlayer are constrained, then the undulatory debonding is not predicted.…”

Section: Resultsmentioning

confidence: 99%

Debonding of confined elastomeric layer using cohesive zone model

Mukherjee

Dillard

Moore

et al. 2016

International Journal of Adhesion and Adhesives

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a b s t r a c tWavy or undulatory debonding is often observed when a confined/sandwiched elastomeric layer is pulled off from a stiff adherend. Here we analyze this debonding phenomenon using a cohesive zone model (CZM). Using stability analysis of linear equations governing plane strain quasi-static deformations of an elastomer, we find (i) a non-dimensional number relating the elastomer layer thickness, h, the long term Young's modulus, E 1 , of the interlayer material, the peak traction, T c , in the CZM bilinear tractionseparation (TS) relation, and the fracture energy, G c , of the interface between the adherend and the elastomer layer, and (ii) the critical value of this number that provides a necessary condition for undulations to occur during debonding. For the elastomer modeled as a linear viscoelastic material with the shear modulus given by a Prony series and a rate-independent bilinear TS relation in the CZM, the stability analysis predicts that a necessary condition for a wavy solution is that T c 2 h=G c E 1 exceed 4:15.This is supported by numerically solving governing equations by the finite element method (FEM). Lastly, we use the FEM to study three-dimensional deformations of the peeling (induced by an edge displacement) of a flexible plate from a thin elastomeric layer perfectly bonded to a rigid substrate. These simulations predict progressive debonding with a fingerlike front for sufficiently confined interlayers when the TS parameters satisfy a constraint similar to that found from the stability analysis of the plane strain problem.

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Section: Resultsmentioning

confidence: 99%

Debonding of confined elastomeric layer using cohesive zone model

Mukherjee

Dillard

Moore

et al. 2016

International Journal of Adhesion and Adhesives

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“…We have not captured a converged value of the order of singularity ( Bogy, 1968 ;Dundurs, 1969 ;Chadegani and Batra, 2011 ) at the initial debond tip ( x = 0). However, key findings reported herein are found to be insensitive to further refining the FE mesh (see Appendix A ).…”

Section: Approachmentioning

confidence: 89%

Effect of confinement and interfacial adhesion on peeling of a flexible plate from an elastomeric layer

Mukherjee

Batra

Dillard

2017

International Journal of Solids and Structures

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a b s t r a c tThe finite element method and a cohesive zone model are used to analyze plane strain interfacial debonding of an elastomeric layer from an overhanging deformable plate when it is peeled off by applying a normal displacement at the edge of the overhang. The commercial software, ABAQUS, is employed in this work that is focused on understanding the collective role of the following two non-dimensional parameters: (i) the confinement parameter, α, defined in terms of the flexural rigidity of the plate, and the modulus and the thickness of the interlayer, and (ii) the adhesion parameter, φ, defined in terms of the cohesive zone parameters and the modulus to thickness ratio of the interlayer. The interfacial adhesion is characterized by a bilinear traction-separation (TS) relation. Numerical experiments reveal that when α is greater than α c , damage initiates at an interior point on the interface and at the interface corner on the traction-free edge irrespective of the value of φ. However, φ must be greater than φ c for the debonding to become wavy/undulatory. The critical value, φ c , of the adhesion parameter agrees with the necessary condition found in our previous work on debonding of an elastomeric layer from a rigid block when it is uniformly pulled outward. For α < α c , damage/debonding initiates only from the interface corner, and no wavy debonding ensues. The peak peeling force prior to the initiation of an internal debond is found to be a monotonically increasing function of φ/ α, suggesting its potential use as a design variable and as a guide for determining the TS parameters. Results of a few additional numerical experiments in which the elastomeric layer can debond from both adherends provide insights into designing a demolding process for a sandwiched elastomeric layer.

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“…Audit quality measurement adopts previous research, namely using perceived proxy quality (PAQ) such as size firm audit, audit fees, reputation, specialization and audit adjustment [28]. In this study, audit quality measurements adopted the research of Riguen and Jarboul [29], where a proxy for measuring audit quality variables using audit quality index consisting of big 4, co-statutory auditors, big 4 / costatutory auditors and audit fees which then develop into 8 proxies.…”

Section: Operational Variablementioning

confidence: 99%

Financial Performance and Audit Quality: Comparative Study of Investor Reaction

Tarmidi¹,

Fitria²,

Ahmad³

2019

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The aim of the company to register its shares in the stock exchange is to get additional funds from investors so that the business continues to grow. The company's financial performance is a factor that is highly considered by investors, but what if the information is not quality based on the audit results from the auditor? This study aims to determine investor reactions to financial performance information and audit quality. The uniqueness of this research is the 2x2 method between financial performance and quality audit so that this study can produce information about how 1) investor reaction to high financial performance with high audit quality, 2) investor reaction to high financial performance but low audit quality, 3) investor reaction to low financial performance with high audit quality, 4) investor reaction to low financial performance with low audit quality. The results showed that investors only react to high financial performance but low audit quality with negative react, it shows that investors are concerned about audit procedures in assessing the company's financial performance. High company performance but has a low audit quality makes investors pay more attention to the company because the good value is actually considered to be detrimental to investors because of its doubtful quality.

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Analysis of adhesive-bonded single-lap joint with an interfacial crack and a void

Cited by 53 publications

References 37 publications

Debonding of confined elastomeric layer using cohesive zone model

Debonding of confined elastomeric layer using cohesive zone model

Effect of confinement and interfacial adhesion on peeling of a flexible plate from an elastomeric layer

Financial Performance and Audit Quality: Comparative Study of Investor Reaction

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