Crack path selection in a brittle adhesive layer

Fleck, N.A.; Hutchinson, John W.; Suo, Zhiyong

doi:10.1016/0020-7683(91)90069-r

Cited by 237 publications

(89 citation statements)

References 13 publications

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“…Increasing the phase angle resulted in a crack path which was closer to the more highly strained arm of the DCB joint, and left more shear hackles. This change in the crack path with increasing phase angle was in accordance with expectations [20,28]. The crack path in the aluminum DCB joints was fully cohesive.…”

Section: Experimental Results For Dcb Specimenssupporting

confidence: 72%

Fracture load predictions and measurements for highly toughened epoxy adhesive joints

Azari

Eskandarian

Papini

et al. 2009

Engineering Fracture Mechanics

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Section: Experimental Results For Dcb Specimenssupporting

confidence: 72%

Fracture load predictions and measurements for highly toughened epoxy adhesive joints

Azari

Eskandarian

Papini

et al. 2009

Engineering Fracture Mechanics

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“…Therefore, the mode-II cohesive parameters deduced in earlier work from pure mode-II geometries are appropriate for use in mixed-mode analyses. However, earlier work in pure mode-I tests showed crack growth always occurring in an "cohesive" fashion, probably because of the "T"-stresses within the adhesive (Fleck et al, 1991). This means that the mode-I parameters deduced in these types of tests may not be suitable for mixed-mode analyses.…”

Section: Interfacial Mode-i Cohesive Parameters For Mixed-mode Fracturementioning

confidence: 76%

Rate effects for mixed-mode fracture of plastically-deforming, adhesively-bonded structures

Sun

Thouless

Waas

et al. 2009

International Journal of Adhesion and Adhesives

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Mixed-mode fracture of an adhesively-bonded structure made from a commercial adhesive and a dual-phase steel has been studied under different rates. Since mixedmode fracture occurs along the interface between the steel and adhesive, the cohesiveparameters for the interface were required. The mode-II interfacial properties were deduced in earlier work. In this paper the mode-I interfacial toughness and the mode-I interfacial strength were determined at different rates. The mode-I interfacial strength was not affected by rate up to crack velocities at levels associated with impact conditions, and was essentially identical to the cohesive strength appropriate for crack growth within the adhesive layer. The mode-I toughness was reduced by about 40% when the crack propagated along the interface rather than within the adhesive. Furthermore, transitions to a brittle mode of failure occurred in a stochastic fashion, and were associated with a drop in interfacial toughness by a factor of about five. The mode-I interfacial parameters were combined with the previously-determined mode-II interfacial parameters within a cohesive-zone model to analyze the mixed-mode fracture of the joints which exhibited both quasi-static and unstable fracture. The mixed-mode model and the associated cohesive parameters for both quasi-static and unstable crack propagation provide bounds for predicting the behavior of the bonded joints under various rates of loading, up to the impact conditions that could be appropriate for automotive design. (August 15, 2008) 2

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“…Although factors such as film thickness, crack tip reaction kinetics and humidity are known to influence fracture energy 5,6 , quantitative partitioning of Γ FT in terms of specific atomistic processes has been elusive. As a result, current atomistic descriptions of interfacial fracture energetics are primarily based on theoretical models and computer simulations 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Atomistic fracture energy partitioning at a metal-ceramic interface using a nanomolecular monolayer

et al. 2011

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We report an experimental approach to partition the fracture energy of a metal-ceramic interface into work of adhesion and plasticity, unveiling the nanomechanics of interfacial deformation and fracture. We obviate crack path uncertainties by constraining fracture to occur in an interfacial nanomolecular layer through fissure of a single bond type whose strength is varied by adjusting the chemical environment.This approach is adaptable for studying interfacial fracture and related phenomena in diverse materials systems in different thermochemical environments.

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Crack path selection in a brittle adhesive layer

Cited by 237 publications

References 13 publications

Fracture load predictions and measurements for highly toughened epoxy adhesive joints

Fracture load predictions and measurements for highly toughened epoxy adhesive joints

Rate effects for mixed-mode fracture of plastically-deforming, adhesively-bonded structures

Atomistic fracture energy partitioning at a metal-ceramic interface using a nanomolecular monolayer

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