Finite-element analysis of SHPB tests on double-lap adhesive joints

Challita, Georges; Othman, Ramzi

doi:10.1016/j.ijadhadh.2010.02.004

Cited by 54 publications

(33 citation statements)

References 52 publications

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“…The aim is not to reproduce a Hopkinson bar experiment accurately, but to find the stress distribution in the joint with a typical loading condition in terms of amplitude. More representative models [4,10] could be used to analyze the stress distribution in this experiment, but, they would have a significant calculation time. Results are presented in Fig.6, 7 and 8.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Significant efforts have already been made for quasi-static loadings [1,2]. However, the existing studies dealing with dynamic loadings rely on the single-lap joint specimen [3] or the double-lap joint specimen [4,5] which only investigate the shear behavior of adhesive joints. Thus, the applicability for more complex loading conditions is still limited.…”

Section: Introductionmentioning

confidence: 99%

“…1 Experimental set-up scheme of the SHPB apparatus and the local optical measurement system dynamic adhesive joints tests are usually performed with Hopkinson bar systems that provide only global measurements: displacements and resultant forces at both ends of the specimen. This characterizes the adhesive assembly, but not of the adhesive joint [3][4][5]. Therefore, an additional local measurement system during the dynamic testing is of great interest.…”

Section: Introductionmentioning

confidence: 99%

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A New Multiaxial Specimen for Determining the Dynamic Properties of Adhesive Joints

et al. 2018

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Adhesive joints are increasingly introduced in industrial structures for bonding critical parts. Their mechanical characterization is a key element for design and is, therefore, necessary. A significant work has been done for the characterization under quasi-static conditions, but techniques are rather limited for dynamic conditions. Indeed, existing dynamic studies characterize adhesive assemblies and not the adhesive joint alone, and do not investigate multiaxial loadings. Thus, this paper proposes an innovative experimental technique for the characterization of adhesive joints under dynamic multiaxial loadings. The experimental method relies on three main components: i) a conventional Split Hopkinson Pressure Bar (SHPB) apparatus, ii) a novel specimen named as DODECA enabling to test three distinct multiaxial loadings with the same methodology and iii) local strain and stress measurements performed by Digital Image Correlation (DIC). The paper exhibits all steps of the experimental procedure as well as underlying preparation and measuring methods. Stress and strain in the adhesive joint are estimated from experimental data directly both during loading and at the failure point. Finally, the dynamic material behavior of the adhesive joint is identified from the data.

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Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A New Multiaxial Specimen for Determining the Dynamic Properties of Adhesive Joints

et al. 2018

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“…In [20], the influence of some adherents' properties on natural vibration of a double-lap joint was examined. One can cite many numerical works carried out in this field [21][22][23][24][25] and experimental works [26,27]. In those works, both metallic and composite substrates were considered.…”

Section: Introductionmentioning

confidence: 99%

Investigation of vibration modes of a double-lap bonded joint

2019

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The authors were concerned in this work in examining the influence of many mechanical and geometrical parameters on the mode shapes of vibration of a double-lap bonded joint. The parameters varied in this study were: adhesive Young's modulus, adhesive and adherents' thicknesses and overlap length. The substrates were made from steel; the adhesive is an epoxy resin. The study was carried out using ANSYS Finite Element software where the first ten modes were extracted. The results obtained from an experimental test conducted by the same workgroup were used to validate the numerical results. Based on the numerical parametric study, the results have shown a dominant influence of the substrates' thickness and the overlap length: the natural frequency increases remarkably with those two parameters. Moreover, the frequencies of the first ten modes were found to be very sensitive in increasing with the increment of either the adherents' thicknesses or the overlap length. On the other hand, the influence of the adhesive Young's modulus was found to be very slight on increasing the natural frequencies for all modes while the adhesive thickness was found to have quite no influence for the first couple of modes, with a slight decrement of frequency for higher modes. Finally, by setting the latter parameters to reference values, a unified parameter function of overlap length and adherent thickness was defined and approximated, and analytical relations for natural frequencies of the first ten modes were established. Keywords Modal analysis • Adhesive • Double-lap joint • Finite element List of symbols a Overlap length (mm) L Length of plates (mm) E Adhesive Young's modulus (GPa) t a Adhesive thickness (mm) t c Central plate's thickness (mm) t e Exterior plates' thickness (mm) W Structure width (mm) ω Natural frequency of the structure (Hz)

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“…On the other hand, the majority of the cited references were only interested in specimen geometry effects in the case of dynamic compression tests [2,5,[23][24][25][26][27][28][29][30][31][32]. Recently, Challita and Othman [34] investigated the case of doublelap bonded joints. Only Huh et al [12] and Verleysen et al [33] and Maringa [35] studied the case of dynamic tensile samples.…”

Section: Introductionmentioning

confidence: 99%

Finite-element analysis of errors on stress and strain measurements in dynamic tensile testing of low-ductile materials

Koubaa¹,

Othman²,

Zouari³

et al. 2011

Computers & Structures

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International audienceTensile dynamic tests are essential experiments to develop and validate constitutive equations. In this paper, we studied the errors on stress and strain measurement in dynamic tensile tests by using finite-element analysis. Two strain and one stress measures were discussed. Mainly, we considered the influence of the material and multiple geometrical and testing parameters. We were limited to the case of elastic behaviour of the material. We observed that the errors on the strain measures are essentially influenced by the geometrical parameters. On the other hand, the error on the stress measure are highly correlated to stress field homogeneity

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Finite-element analysis of SHPB tests on double-lap adhesive joints

Cited by 54 publications

References 52 publications

A New Multiaxial Specimen for Determining the Dynamic Properties of Adhesive Joints

A New Multiaxial Specimen for Determining the Dynamic Properties of Adhesive Joints

Investigation of vibration modes of a double-lap bonded joint

Finite-element analysis of errors on stress and strain measurements in dynamic tensile testing of low-ductile materials

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