An experimental study of the fracture resistance of bimaterial interfaces

Cao, Huiling; Evans, A.G.

doi:10.1016/0167-6636(89)90020-3

Cited by 355 publications

(108 citation statements)

References 5 publications

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“…Cao & Evans 1989;Evans & Hutchinson 1989;Evans et al 1990;Jensen et al 1990;Hutchinson & Suo 1992;Liechti & Chai 1992) indicate that, under combined normal and tangential loading (often referred to as 'mixed-mode' fracture), dissipative effects are also seen to significantly increase the interface toughness, which is analogous to the work of adhesion in a contact problem. Because of the range of dissipative mechanisms present in such fracture problems, phenomenological models are used to capture the dependence of interface toughness upon the mode mixity of loading.…”

Section: Introductionmentioning

confidence: 99%

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

2009

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Tangential loading in the presence of adhesion is highly relevant to biological locomotion, but mixed-mode contact of biological materials or similar soft elastomers remains to be well understood. To better capture the effects of dissipation in such contact problems owing to viscoelasticity or irreversible interfacial adhesive processes, a model is developed for the combined adhesive and tangential loading of a rigid sphere on a flat halfspace which incorporates a phenomenological model of energy dissipation in the form of increased effective work of adhesion with increasing degree of mode mixity. To verify the model, contact experiments are performed on polydimethylsiloxane (PDMS) samples using a custom-built microtribometer. Measurements of contact area during mixed normal/tangential loading indicate that the strong dependence of the effective work of adhesion upon mode mixity can be captured effectively by the phenomenological model in the regime where the contact area stayed circular and the slip was negligible. Rate effects were seen to be described by a power-law dependence upon the crack front velocity, similar to observations of rate-dependent contact seen for pure normal loading.

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Section: Introductionmentioning

confidence: 99%

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

2009

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“…Mixed-mode conditions are quantified by a mode-mixity phase angle, which is 0 • for pure mode-I and 90 • for pure mode-II. This test geometry produces mixed mode loading with an angle phase of ∼ 45 • [35,36,[38][39][40][41]. As it is shown by Charalambides et al [35], to obtain the individual stress intensity factors (K I and K II ) an extra analysis is required.…”

Section: Calculation Of the Interface Fracture Toughnessmentioning

confidence: 99%

Determination of strength and debonding energy of a glass-concrete interface for encapsulation-based self-healing concrete

Gilabert

Tittelboom

Tsangouri

et al. 2017

Cement and Concrete Composites

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This paper presents a combined experimental-numerical analysis to assess the strength and fracture toughness of a glass-concrete interface. This interface is present in encapsulation-based self-healing concrete. There is absence of published results of these two properties, despite their important role in the correct working of this self-healing strategy. Two setups are used: uniaxial tensile tests to assess the bonding strength and four point bending tests to get the interfacial energy. The complementary numerical models for each setup are conducted using the finite element method. Two approaches are used: cohesive zone model to study the interface strength and the virtual crack closure technique to analyze the interfacial toughness. The models are validated and used to verify the experimental interpretations. It is found that a glass-concrete interface can develop a maximum strength of approximately 1 N/mm 2 with fracture energy of 0.011 J/m 2 .

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“…Previously, serrations and hackles were modeled by first identifying a scalar material parameter with the interfacial roughness and then investigating its effect on interfacial fracture and strength [Cao and Evans 1989;Ramulu et al 2001;Lucksanasombool et al 2003;Packham 2003]. Because the method is simple, it fails to capture micromechanical and microgeometric details at the interface and around the crack's tip.…”

Section: Introductionmentioning

confidence: 99%

Serration effects on interfacial cracks

Pelegri¹,

Shan

2007

JOMMS

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To investigate the effect of serrations in an interfacial crack between dissimilar materials, we introduce into the Finite Element (FE) framework a unit cell (UC) at microscale. By assigning material-specific properties to these unit cells, we can model various serration profiles and distributions and calculate their effect on the mixed-mode stress intensity factor (SIF), including its magnitude and phase angle. The simulation demonstrates that serration profoundly changes the local behavior of an interfacial crack. The serrations decrease the SIF in mode I, increase it in mode II, and, when the serration's height-towidth ratio increases, the mode mixity SIF increases as well. We find that sparse serration confines variation in the SIFs to the local peaks and that dense serrations cause widespread undulations in the SIF's magnitude and phase angle.

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An experimental study of the fracture resistance of bimaterial interfaces

Cited by 355 publications

References 5 publications

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

Determination of strength and debonding energy of a glass-concrete interface for encapsulation-based self-healing concrete

Serration effects on interfacial cracks

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