A cohesive zone element for mode I modelling of adhesives degraded by humidity and fatigue

Costa, M.; Viana, G.; Créac’Hcadec, Romain; Silva, Lucas F. M. da; Campilho, R.D.S.G.

doi:10.1016/j.ijfatigue.2018.03.014

Cited by 41 publications

(17 citation statements)

References 22 publications

(29 reference statements)

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“…21 They applied the method on end notched flexure (ENF) specimens. For both studies 20,21 for pure mode I and pure mode II conditions, good agreement between the experimental and the numerically estimated fatigue life were found. However, one of the main shortcomings of the proposed method is to estimate the total fatigue life ( N f ) before running the numerical analysis.…”

Section: Numerical Toolsupporting

confidence: 54%

“…One of the most recent methods for fatigue analysis of adhesive joints was proposed by Costa et al. 20 They suggested a semi empirical method based on a statistical and mathematical analysis of the experimental fatigue results. They applied their approach for pure mode I loading conditions.…”

Section: Numerical Toolmentioning

confidence: 99%

“…Based on a triangular CZM, Costa et al. 20 proposed a data degradation approach based on the statistical analysis of the joints subjected to mode I cyclic loads. Based on their approach, the degradation of the cohesive properties of the adhesive is defined as a function of the initial conditions of the properties and the total fatigue life the joints.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tensile fatigue life prediction of adhesively bonded structures based on CZM technique and a modified degradation approach

Akhavan‐Safar

Monteiro

Carbas

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part G:

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Due to their inherent advantages, the use of adhesive joints is widely increasing in advanced industrial sectors such as automotive and aircraft structures, where the lightweight components play a significant role in the efficiency of the products. These structural adhesively bonded connections mostly experience cyclic stress conditions during their service life. One of the most critical fatigue loading conditions for adhesive joints is the tensile cyclic loading. To design against tensile fatigue conditions recently a cohesive zone modelling (CZM) technique combined with a degradation approach was proposed in the literature. However, to apply this degradation method on cohesive elements, the total fatigue life of the joints should be known before the analysis. The aim of the current work is to improve this degradation approach to calculate the fatigue life automatically. To achieve this, a combination of Paris law and degradation model were considered in a numerical procedure. Using the Paris law and the experimental results obtained out of the fatigue crack propagation tests of DCB (double cantilever beam) specimens, the tensile fatigue life of each integration point (IP) during the analysis is estimated automatically. The model was validated and calibrated by experimental data.

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Section: Numerical Toolsupporting

confidence: 54%

Section: Numerical Toolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tensile fatigue life prediction of adhesively bonded structures based on CZM technique and a modified degradation approach

Akhavan‐Safar

Monteiro

Carbas

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part G:

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show abstract

“…The cohesive zone model approach is a useful method for modeling of adhesively bonded joints and life estimation. Costa et al used this method successfully to obtain the best traction‐separation law. They concluded that trapezoidal traction‐separation law is the most appropriate model for the considered problem.…”

Section: Introductionmentioning

confidence: 99%

The effect of adherent thickness on fatigue life of adhesively bonded joints

Shahani

Pourhosseini

2018

Fatigue Fract Eng Mat Struct

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The effect of adherent thickness on the fatigue performance, fatigue limit, and failure mode of adhesively bonded thin aluminum single lap joint (SLJ) was experimentally and numerically investigated. High‐cycle fatigue tests were performed, and fatigue life was estimated using various fatigue criteria and finite element modeling. Based on the experimental results, increase in adherent thickness leads to increase in fatigue limit. In addition, failure location changes from adhesive to adherent by increasing the adherent thickness. It seems that in adherent failure, selecting a sheet with higher fatigue strength is required to achieve higher fatigue life. Also, based on the analysis of different fatigue criteria, Smith‐Watson‐Topper criterion could predict the joint fatigue life more accurately by considering the mean stress effect and the plastic strain. Finally, as an important result, an unsymmetrical SLJ specimen was evaluated as an industrial case study, and the empirical estimated life was consistent with the experimental results.

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“…Their models are based on the modified Paris law, and its main feature is the use of a single damage parameter accounting for cumulative damage resulting from static and fatigue loading. Costa et al developed a finite element based on the cohesive zone model approach and implemented as a user element, for the modelling of adhesively bonded joints subjected to degradation by humidity and fatigue using software ABAQUS. Kinloch et al modelled cyclic‐fatigue crack‐growth in adhesively bonded joints by a form of the Hartman and Schijve crack‐growth equation.…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack growth simulation in adhesively bonded composite joints

Τσερπές

Floros

2018

Fatigue Fract Eng Mat Struct

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A numerical model has been developed for simulating fatigue crack growth (debonding) in adhesively bonded composite joints subjected to mode‐I, mode‐II, and mixed‐mode I + II loading conditions. The model employs a cohesive zone model described by a modified bilinear traction‐separation law. Fatigue damage in the composite adherends is not considered in the model. To account for crack divergence and reduce sensitivity of numerical results on mesh density, a crack front detection algorithm based on the effective element's length was employed. The model is implemented as a user‐defined subroutine (UMAT) in the commercial FE code LS‐DYNA. The model's input parameters, in the form of a modified Paris law, and the validation data were obtained from experimental tests conducted by the authors. It was found that the model is able to successfully simulate crack growth in the regime of the experimental data.

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A cohesive zone element for mode I modelling of adhesives degraded by humidity and fatigue

Cited by 41 publications

References 22 publications

Tensile fatigue life prediction of adhesively bonded structures based on CZM technique and a modified degradation approach

Tensile fatigue life prediction of adhesively bonded structures based on CZM technique and a modified degradation approach

The effect of adherent thickness on fatigue life of adhesively bonded joints

Fatigue crack growth simulation in adhesively bonded composite joints

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