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Three failure modes in the mode-I fracture of FRP concrete interface bond are identified: (1) complete adhesive concrete interface debonding (a weak bond), (2) complete concrete cohesive cracking near the bond line (a strong bond), and (3) a combined failure of interface debonding and concrete cohesive cracking.
Similar(59)
Thermomechanical observations indicate that the deformability and stiffness-softening of the concrete adhesive interface tend to augment at elevated temperatures, and the failure of the interface is controlled by material cohesion rather than adhesion.
This interface model includes a tensile-shear behavior law, the fatigue failure of the interface, and the friction evolution between both surfaces.
It was demonstrated that micro-cracking might occur in the interface, accompanied with acoustic emission signals prior to the complete failure of the interface as the load was increased.
The results showed that the shear failure of the interface between the old and new concrete is the failure mode of the composite joint and the interface between the steel plate and new concrete is always in good condition.
This may increase tension on the side plate screws, leading to failure of screw bone interface.
In turn this suggested a corrosion based failure of the interface between the DLC coating and the cobalt chrome subsurface.
There was nearly no slip between the old and new concrete before the bonding failure of the interface.
In this case, the base material exhibited a cohesive-like failure of the interface epoxy-resin/glass fiber of the FR4-laminate.
Conversely in softer systems, the distance between two consecutive breaking fibers gets smaller and failure of the interface is localized, exhibiting an effective brittle regime.
A safe fatigue failure criterion is proposed relating the accumulated slip with the value of the slip at shear failure of the interface for static loading.
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