Analytical models of adhesively bonded joints—Part I: Literature survey

Silva, Lucas F. M. da; Neves, Pedro; Adams, RD; Spelt, J.K.

doi:10.1016/j.ijadhadh.2008.06.005

Cited by 515 publications

(194 citation statements)

References 53 publications

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“…Others showed the enhanced adhesive strength by modifying the shape [13,14] of the joints and adding the fillets at the overlap extremities [15]. Most researches including numerical [13][14][15][16][17][18] and analytical studies [19][20][21][22] presented the stress distributions along the bondline (interface) between the adherents for the purpose of optimizing and designing a high-quality interface, and several methods were proposed accordingly. The load-bearing capabilities of joints changed negligibly with a certain length of gaps in the adhesive layers [23][24][25].…”

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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“…Methodologies to predict the durability of adhesive joints are of interest because of the increasing use of adhesive joints in structural applications [1][2][3], especially in the aerospace and automotive industries. One of the main factors affecting the durability of adhesive joints is the presence of moisture.…”

Section: Introductionmentioning

confidence: 99%

A Method of Predicting the Stresses in Adhesive Joints after Cyclic Moisture Conditioning

Mubashar

Ashcroft

Critchlow

et al. 2011

The Journal of Adhesion

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The durability of adhesive joints is of special concern in structural applications and moisture has been identified as one of the major factors affecting joint durability. This is especially important in applications where joints are exposed to varying environmental conditions throughout their life. This paper presents a methodology to predict the stresses in adhesive joints under cyclic moisture conditioning. The single lap joints were manufactured from aluminium alloy 2024 T3 and the FM73-BR127 adhesive-primer system. Experimental determination of the mechanical properties of the adhesive was carried out to measure the effect of moisture uptake on the strength of the adhesive. The experimental results revealed that the tensile strength of the adhesive decreased with increasing moisture content. The failure strength of the single lap joints also progressively degraded with time when conditioned at 50°C, immersed in water, however, most of the joint strength recovered after drying the joints. A novel finite element based methodology, which incorporated moisture history effects, was adopted to determine the stresses in the single lap joints after curing, conditioning and tensile testing. A significant amount of thermal residual stress was present in the adhesive layer after curing the joints, however, hygroscopic expansion after the absorption of moisture provided some relief from the curing stresses. The finite element * Corresponding author. Tel: +44 1509 227535; fax: +44 1509 223934 Email address: i.a.ashcroft@lboro.ac.uk (I.A.Ashcroft) 2 model used moisture history dependent mechanical properties to predict the stresses after application of tensile load on the joints. The maximum stresses were observed in the fillet areas in both the conditioned and the dried joints. Study of the stresses revealed that degradation in the strength of the adhesive was the major contributor in the strength loss of the adhesive joints and adhesive strength recovery also resulted in recovered joint strength.The presented methodology is generic in nature and may be used for various joint configurations as well as for other polymers and polymer matrix composites.

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“…The difference between the average stress calculated from the formula and the local stress accumulation at the ends of the overlap depends on many factors, including the thickness of the adhesive layer and its Kirchhoff module Gk. The dependence allowing to determine stress distribution was given by Volkersen [9][10]. Figure 6a shows the dimensions of the single-lap joint in accordance with the standard PN-EN 1465:2009 for determining the mechanical properties of adhesive under shear.…”

Section: Test Resultsmentioning

confidence: 99%

Determination of design mechanical properties of adhesives in a tensile and compression test

Maćkowiak

Płaczek

Kotyk

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Evaluation of adhesive bond Young's modulus during crosslinking using a mechanical method and an ultrasound method B Mascaro, M K Budzik, M Castaings et al. Abstract. Structural adhesives are increasingly used in the construction of mechanical devices. Adhesive joints replace welded, soldered and other joints. The strength of the adhesive joints obtained allows the transfer of loads. The possibility of combining different materials is a significant advantage. In order to design joints, it is necessary to know the mechanical properties of adhesives. Determining them requires the use of special methods of obtaining specimens. Analytical and numerical methods of stress estimation in adhesive joints require more material data than is provided by manufacturers. The aim of the following work is to present the method of manufacturing specimens and to compare methods for determining mechanical properties based on three example structural adhesives. The paper presents two methods for determining the mechanical properties of exemplary structural adhesives: metacryl, epoxy and polyurethane adhesive. The tests were carried out on a cast and then machined specimens. Flat specimens were used in a tensile test. In compression test, round specimens were used. The results obtained from both tests were compared with the manufacturer's data. Differences and possible reasons for them were indicated. Stress distributions in the adhesive single lap joint were estimated using the Volkersen analytical method for various determined mechanical properties.

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Analytical models of adhesively bonded joints—Part I: Literature survey

Cited by 515 publications

References 53 publications

Strength and interface failure mechanism of adhesive joints

Strength and interface failure mechanism of adhesive joints

A Method of Predicting the Stresses in Adhesive Joints after Cyclic Moisture Conditioning

Determination of design mechanical properties of adhesives in a tensile and compression test

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