A Prediction Method of the Behavior of Adhesively Bonded Structures under Cyclic Shear Loading Based on a Characterization of the Viscous Aspects of the Adhesive in an Assembly

Bidaud, Pierre; Créac’Hcadec, Romain; Thévenet, David; Cognard, Jean‐Yves; Jousset, Pierre

doi:10.1080/00218464.2014.963840

Cited by 8 publications

(6 citation statements)

References 21 publications

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“…For a given loading rate, experimental results under shear loading revealed that the displacement at failure was reproducible for each FT a /FT m couples tested. [29,34] Taking into account this interesting experimental observation, a strain-based failure criterion was developed in this study. Numerical prediction of the fatigue lifetime was thus performed for loading cases involving number of cycles to failure below 10 5 .…”

Section: Discussionmentioning

confidence: 99%

“…This bonding process permits to have reliable experimental results for the mechanical tests performed due to their reproducibility. [29] In the following, FT represents the applied load in the tangential direction of the bonded surface and FN represents the applied load in the normal direction. The load components measured during the tests are from the testing machine load cell.…”

Section: Bonded Specimens and Bonding Processmentioning

confidence: 99%

“…Therefore, previous studies have shown that a model divided into two parts delimited by a threshold gives a good description for this mechanical behavior. [29] For load values lower than the yield stress R 0 , all strains are reversible. When load values are higher than this threshold, a visco-plastic flow appears.…”

Section: Modeling the Viscous Behaviormentioning

confidence: 99%

“…The inverse identification method of the material parameters takes into account the non-uniform stress distribution along the adhesive overlap. [29] This numerical method couples the numerical results, given by the Abaqus™ FE code, and the optimization software Python™ considering the non-linear optimization library NLOPT. Concerning the optimization works performed in this thesis, the algorithm used was based on an implementation of a globally convergent method of moving asymptotes (MMA) implementation.…”

Section: Inverse Identificationmentioning

confidence: 99%

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A fatigue life prediction method of adhesively bonded joints based on visco-elastic and visco-plastic behavior: application under cyclic shear loading

Bidaud

Créac’Hcadec

Jousset

et al. 2016

Journal of Adhesion Science and Technology

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International audienceTo perform an evaluation of the abilities of a bonded structure to endure repetitive loadings, characterizations of structural adhesive joints mechanical behavior are key objectives. The aim of this study is to describe the phenomena occurring in the bonded joint until the appearance of a macroscopic crack. Using lap-shear type specimens, associated with stress concentrations, crack initiation generally appears early at the edge of the adhesive joint, which makes it difficult to identify the crack initiation phase. To characterize more properly the crack initiation phase, bonded joints designed to limit stress concentrations allowed the accurate characterization of the mechanical phenomena occurring in a polyurethane structural ductile adhesive. Then, based on the experimental response of the bonded assembly to creep recovery tests, a visco-elastic visco-plastic behavior law is defined for the adhesive joint mechanical behavior. In the following, details of such a model able to take into account the hydrostatic sensitivity with a non-associated formalism are given. The numerical work performed here relies on the identification of the material parameters of the behavior law using creep-recovery tests to model the cyclic behavior of bonded structures. Then, experimental results under fatigue loading are presented and compared to numerical simulations. Finally, using a strain-based criterion for the definition of crack initiations, predictions of fatigue lifetime are performed for specimens under shear loadings. The quality of the results obtained underlines that an accurate description of viscous mechanisms in the adhesive layer allows describing efficiently the mechanical behavior of bonded joints under cyclic loading

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Section: Discussionmentioning

confidence: 99%

Section: Bonded Specimens and Bonding Processmentioning

confidence: 99%

Section: Modeling the Viscous Behaviormentioning

confidence: 99%

Section: Inverse Identificationmentioning

confidence: 99%

See 2 more Smart Citations

A fatigue life prediction method of adhesively bonded joints based on visco-elastic and visco-plastic behavior: application under cyclic shear loading

Bidaud

Créac’Hcadec

Jousset

et al. 2016

Journal of Adhesion Science and Technology

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“…This accounts for around 12% of the total blade weight, since a 60 m blade weights around 4000 kg [48]. In order to model the adhesive mechanical behaviour with hydrostatic pressure dependence, the response of the material for different loading modes is needed in the experimental database [68].…”

Section: Bulk Structural Adhesive or Joint Testing?mentioning

confidence: 99%

Review of fatigue of bulk structural adhesives and thick adhesive joints

Zuo

Vassilopoulos

2020

International Materials Reviews

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Fatigue of structural adhesives has been investigated through joints and a little number of works investigate bulk adhesive behaviour itself. Aerospace and automotive engineering focuses more on joint configuration studies, which are correlated with practical applications. Previous works showed that for thin adhesive joints, material properties measured by bulk adhesive testing and joint testing are similar despite the triaxial stress states developing in the adhesive bondlines. However, with the introduction of structural adhesives in construction industry, thicker bondlines have emerged where the bulk adhesive material dominates the joint behaviour. This review work summarises works on the fatigue of bulk structural adhesives used mainly in the construction industry investigating structural adhesives fatigue behaviour either through experiment on joints or on bulk adhesive specimens. The work focuses on thick adhesive bondlines in joints, and discusses the controversy that is over whether adhesive properties from joints or from bulk material should be used.

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Theoretical assessment of ELS test data reduction technique using virtual testing

et al. 2021

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A Prediction Method of the Behavior of Adhesively Bonded Structures under Cyclic Shear Loading Based on a Characterization of the Viscous Aspects of the Adhesive in an Assembly

Cited by 8 publications

References 21 publications

A fatigue life prediction method of adhesively bonded joints based on visco-elastic and visco-plastic behavior: application under cyclic shear loading

A fatigue life prediction method of adhesively bonded joints based on visco-elastic and visco-plastic behavior: application under cyclic shear loading

Review of fatigue of bulk structural adhesives and thick adhesive joints

Theoretical assessment of ELS test data reduction technique using virtual testing

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