Experimental study of the Mode I adhesive fracture energy in DCB specimens bonded with a polyurethane adhesive

Sekiguchi, Yu; Katano, Masato; Sato, Chiaki

doi:10.1080/00218464.2015.1070101

Cited by 25 publications

(11 citation statements)

References 25 publications

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“…3c). Although the spring constant for adhesively bonded parts can be defined in several different ways [15][16][17][18][19][20], a spring constant assuming the deformation of the adhesive under a plane strain state, given as…”

Section: Model Configurationmentioning

confidence: 99%

“…The crack length is strongly affected by the adhesive deformation, leading to a calculation error in the fracture energy. Therefore, the difference between the theoretical crack length and the measured one was investigated, and the crack length correction in the corrected beam theory (CBT) [10][11][12][13] and an effective crack length, namely compliance-based beam method (CBBM), [14,15] have been respectively derived. Replacing the adhesive layer with an elastic foundation, i.e., the Winkler foundation, closed form solutions were obtained for the DCB [15][16][17][18] and other test methods [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Analytical determination of adhesive layer deformation for adhesively bonded double cantilever beam test considering elastic–plastic deformation

Sekiguchi

Hayashi

Sato

2018

The Journal of Adhesion

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The plastic zone at the crack front of an adhesively bonded double cantilever beam (DCB) specimen is analytically expressed considering the deformation of the adhesive layer. The plastic zone length and strain during the crack propagation are obtained, and the effect of the traction-separation profile on the DCB test results is investigated. The fracture energy is given by the area under the traction-separation curve and is not affected by the curve profile. However, the crack length of the DCB specimen is strongly affected by the adhesive deformation, leading to a calculation error in the fracture energy. Therefore, several crack length correction methods have been proposed. An analytical approach to describe the plastic zone at the crack front would help better understand DCB tests for adhesives. In this study, an analytical solution for a DCB test is discussed assuming that the adhesive layer undergoes an elastic-plastic deformation. The elastic zone of the specimen is replaced with a beam on an elastic foundation and the plastic zone with a beam having a uniformly distributed load. Influence of the plastic zone at the crack front in the DCB tests is analytically described by assuming an elastic-perfectly plastic material.

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Section: Model Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical determination of adhesive layer deformation for adhesively bonded double cantilever beam test considering elastic–plastic deformation

Sekiguchi

Hayashi

Sato

2018

The Journal of Adhesion

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“…All of these methods have one thing in common: one needs to measure the crack length during the failure process to calculate the fracture energy by means of beam theory. For this, several approaches have been developed: (i) measuring the crack length directly by crack length monitoring [22,27,34,35,36] or (ii) estimating the crack length by measurement of the compliance [33,37,38,39]. However, the calculation of the fracture energy is challenging when relying upon monitoring of the crack length.…”

Section: Introductionmentioning

confidence: 99%

On the dynamic response of adhesively bonded structures

Lißner

Alabort

Erice

et al. 2020

International Journal of Impact Engineering

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Fracture mechanics experiments are used to investigate the rate-dependent failure of adhesively bonded structures under different deformation modes: I, II and I/II. First, the high-rate mechanical response of the adhesive interface is analysed with a newly developed method -which relies entirely upon digital image correlation. The method was purposely designed to avoid any dynamic effects which may be present. This novel method is verified against quasi-static standard methods showing good agreement. Finally, simulations of the experiments are used to validate a cohesive zone model of the adhesive. The ability of the model to predict cohesive failure under a wide range of strain rates and deformation modes is demonstrated.

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“…Figure 10 shows the fracture energy of the polyurethane adhesive in the quasistatic and impact tests. The average fracture energy was 2475 J/m 2 for the quasi-static Time [8,11], was within the acceptable range for both adhesives. In contrast, the comparison of the results with different loading conditions indicates that there is a difference in rate dependence of the adhesive types.…”

Section: Resultsmentioning

confidence: 86%

Experimental investigation of mode I fracture energy of adhesively bonded joints under impact loading conditions

Yamagata

Sekiguchi

et al. 2017

Appl Adhes Sci

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Experimental study of the Mode I adhesive fracture energy in DCB specimens bonded with a polyurethane adhesive

Cited by 25 publications

References 25 publications

Analytical determination of adhesive layer deformation for adhesively bonded double cantilever beam test considering elastic–plastic deformation

Analytical determination of adhesive layer deformation for adhesively bonded double cantilever beam test considering elastic–plastic deformation

On the dynamic response of adhesively bonded structures

Experimental investigation of mode I fracture energy of adhesively bonded joints under impact loading conditions

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