Predictive strength-fracture model for composite bonded joints

Goyal, Vinay K.; Johnson, Eric R.; Goyal, Vijay K.

doi:10.1016/j.compstruct.2007.01.029

Cited by 51 publications

(35 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5 shows two representative meshes of the CZM and XFEM damage modelling analyses, considering the standard refinement that was used for this study. Restraining and loading conditions were introduced to faithfully model the real testing conditions, consisting on clamping of the joint at one edge and applying a vertical restraint and tensile displacement at the opposite edge [41,42]. The meshes were constructed taking advantage of the automatic meshing algorithms of ABAQUS s , from a manual seeding procedure that included biasing towards the Table 2 Properties of the adhesive Araldite s AV138 for CZM modelling [40].…”

Section: Numerical Analysismentioning

confidence: 99%

Strength prediction of single- and double-lap joints by standard and extended finite element modelling

Campilho

Banea

Pinto³

et al. 2011

International Journal of Adhesion and Adhesives

309

121

View full text Add to dashboard Cite

The structural integrity of multi-component structures is usually determined by the strength and durability of their unions. Adhesive bonding is often chosen over welding, riveting and bolting, due to the reduction of stress concentrations, reduced weight penalty and easy manufacturing, amongst other issues. In the past decades, the Finite Element Method (FEM) has been used for the simulation and strength prediction of bonded structures, by strength of materials or fracture mechanics-based criteria. Cohesive-zone models (CZMs) have already proved to be an effective tool in modelling damage growth, surpassing a few limitations of the aforementioned techniques. Despite this fact, they still suffer from the restriction of damage growth only at predefined growth paths. The eXtended Finite Element Method (XFEM) is a recent improvement of the FEM, developed to allow the growth of discontinuities within bulk solids along an arbitrary path, by enriching degrees of freedom with special displacement functions, thus overcoming the main restriction of CZMs. These two techniques were tested to simulate adhesively bonded single-and double-lap joints. The comparative evaluation of the two methods showed their capabilities and/or limitations for this specific purpose.

show abstract

Section: Numerical Analysismentioning

confidence: 99%

Strength prediction of single- and double-lap joints by standard and extended finite element modelling

Campilho

Banea

Pinto³

et al. 2011

International Journal of Adhesion and Adhesives

309

121

View full text Add to dashboard Cite

show abstract

“…Over recent years, they have become increasingly used for modelling composites, particularly in relation to delamination [1,2,3,4,5,6,7] and adhesive bond-line failure [8,9,10,11]. Compared with alternative analysis techniques such as the Virtual Crack Closure Technique (VCCT), they offer the advantages of encompassing both crack initiation and crack propagation and the ability to model multiple crack paths, without the need for computationally expensive crack-path following algorithms.…”

Section: Introductionmentioning

confidence: 99%

Cohesive zone length in numerical simulations of composite delamination

Harper¹,

Hallett²

2008

Engineering Fracture Mechanics

427

287

View full text Add to dashboard Cite

Abstract:Accurate analysis of composite delamination using interface elements relies on having sufficient elements within a softening region known as the cohesive zone ahead of a crack tip. The present study highlights the limitations of existing formulae used to predict numerical cohesive zone length and demonstrates modifications necessary for improved accuracy. Clarification is also provided regarding the minimum number of interface elements within the cohesive zone. Finally, appropriate values of numerical interfacial strength are examined. The results presented will aid the application of mesh design techniques that both preserve numerical accuracy, whilst minimising computational expense. Where applicable, subscripts I, II and m are used to denote properties under mode I, mode II and mixed mode loading respectively. Keywords

show abstract

“…A step forward has been made with the introduction of the well-known cohesive elements to the simulation of adhesive joints, under the framework of Cohesive Zone Modeling (CZM) techniques [19,20,21,22,23,24,25]. This methodology allows the study of the debonding initiation and propagation process, without considering the presence of initial flaws and leads to the calculation of the load carrying capacity of the considered adhesive joint [2].…”

Section: Introductionmentioning

confidence: 99%

“…The available techniques for damage modelling can be separated into local or continuum approaches. In the local approach, damage is confined to a zero volume line or a surface, allowing the simulation of an interfacial failure between the adhesive bond and the adherend or/and of a cohesive failure [21,22].…”

Section: Introductionmentioning

confidence: 99%