Influence of adhesive thickness and filler content on the mechanical performance of aluminum single-lap joints bonded with aluminum powder filled epoxy adhesive

Kahraman, Ramazan; Sunar, M.; Yilbaş, Bekir Sami

doi:10.1016/j.jmatprotec.2007.11.121

Cited by 186 publications

(58 citation statements)

References 21 publications

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“…1a has the advantages described above. Moreover, single lap joints are economical, practical and easy to make [1,2]. Thus they have been found increasingly wide applications in many industries, such as civil engineering [3][4][5], automotive [6][7][8] and aircraft industries [9].…”

Section: Introductionmentioning

confidence: 99%

Strength and interface failure mechanism of adhesive joints

Wei

2012

International Journal of Adhesion and Adhesives

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a b s t r a c tAdhesive joints have a wide range of applications in the civil engineering, automotive and aircraft industries. In the present research, we use the finite element method to systematically study the overall strength and interface failure mechanism of single lap joints, which are subjected to tensile loading, focusing on the effects of various system parameters including fracture energy of the adhesive layer, overlap length and adhesive layer thickness on the load-bearing capability of the joints. The results show that the overlap length and the adhesive fracture energy have combined influences on the load-bearing capability. On the other hand, a preliminary damage analysis of the adhesive layer is carried out, considering the situations when the loads arrive to the peak values. Furthermore, the interface behavior is investigated, including the interface stress analysis and interface slip. The rotation of the joint during loading and its influence factors are studied as well. Obtained results suggest that the interface stress distributions are related to the slip and the rotation angle.Crown

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Section: Introductionmentioning

confidence: 99%

Strength and interface failure mechanism of adhesive joints

Wei

2012

International Journal of Adhesion and Adhesives

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“…Azari, Papimi and Spelt [27] reported in 2009 that certain researchers had found that increasing t a caused an increase in joint strength [28,29], some observed a strength decrease [5,30,31] and some no significant change at all [31,32]. A second 2009 investigation by Grant et al [26] with joints subjected to four-point bending concluded that the strength was "independent of the adhesive thickness", an "increase in adhesive thickness causes the joint overlap section to be stiffer" and that, for tension loading the strength increases with increased t a .…”

Section: Page 19mentioning

confidence: 99%

A finite element modelling methodology for the non-linear stiffness evaluation of adhesively bonded single lap-joints: Part 1. Evaluation of key parameters

Pearson

Mottram

2012

Computers & Structures

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Reported in this paper is the development and verification of a finite element model with the fewest solid elements that can predict the non-linear stiffness characteristics of adhesively bonded single lap-joints in vehicle bodies. This work was driven by the need to significantly reduce computing hardware resources and run times for whole body analyses, and to achieve this goal the lap-joint needs to be modelled by a 'small' number of shell elements. It is wellknown that the deformation of bonded lap-joints is dependent on seven key parameters, and that it is impractical to have a comprehensive characterisation of these by physical testing alone. To gain further understanding of the influence of these parameters on joint stiffness, over a wider range of variables than could be practically achieved in the laboratory, the ANSYS finite element code is used to simulate the highly non-linear (geometric and material) response of bonded joints. The authors use the laboratory results for joint stiffness from nineteen batches of laboratory specimens to aid the development, and verification, of numerical derived stiffness curves from a solid element model. Initially, a very refined mesh is used. This model is developed to have a 'coarse' solid element mesh that minimises run times without the calculated joint stiffness deviating by more than 10% from the batch mean * Corresponding author: E-mail I.T.Pearson@warwick.ac.uk Page 2 of 10 measurements from laboratory testing. Numerical results from many simulations using the 'coarse' solid mesh model are used to show that, for the shell modelling methodology (reported in Part 2 on this work) to be successful, a representative model must account for the four key parameters of: adherend stress-strain relationship, adherend thickness, bond line thickness, and the over lap length. The ANSYS results also confirm that stiffness is directly proportional to joint width.

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“…As commented by Kahraman et al 7 epoxy resins are attractive for metalbonding adhesive systems because of their ability to cure without producing volatile by-product and their low shrinkage upon cure. Epoxies, also are able to bond well to a variety of treated or untreated metal surface.…”

Section: Introductionmentioning

confidence: 99%

The Carbon Nanotubes Effect into Single-lap Joint Failure Modes and Load Capacity: a Macromechanical Analysis

Monteiro

Ávila

2018

Mat. Res.

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This study investigates the influence of the adhesive (epoxy resin) thickness and the dispersions of non-functionalized carbon based nanostructures (carbon nanotubes -CNT) on mechanical properties of single-lap bonded joints. To achieve this goal, three CNT concentrations (0.5%, 1.0% and 2.0% m/m); and three different bondline thicknesses (0.05 mm, 0.15 mm and 0.40 mm) were evaluated. The mechanical properties were measured using the apparent shear tensile test, based on ASTM D5868. The results showed that the addition of 1.0 wt% CNTs improved the interface strength, leading to an increase on delaminated areas in failure region up to 55.36% and also improving the peak force up to 13.85%. Decrease in adhesive thickness from 0.40 mm to 0.05 mm promoted a stress redistribution inside adhesive layer improving the peak force up to 13.91%. CNT seems to promote changes in failure modes, light fiber tear (LFT) failure significantly increases up to 45.96%, indicating that interface strength between adhesive and adherent was improved.

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Influence of adhesive thickness and filler content on the mechanical performance of aluminum single-lap joints bonded with aluminum powder filled epoxy adhesive

Cited by 186 publications

References 21 publications

Strength and interface failure mechanism of adhesive joints

Strength and interface failure mechanism of adhesive joints

A finite element modelling methodology for the non-linear stiffness evaluation of adhesively bonded single lap-joints: Part 1. Evaluation of key parameters

The Carbon Nanotubes Effect into Single-lap Joint Failure Modes and Load Capacity: a Macromechanical Analysis

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