Component failure

A component failure is a special kind of cohesive failure, in which the destruction occurs only within the substrate, but where both sides of the bond are still completely covered by adhesive.

In fracture-mechanical investigation, the fracture of the adherend is usually evaluated as a positive indication of a successful bond, which can justify the use of a less powerful adhesive or a smaller quantity, for example.

In the case of a boundary layer fracture on the part to be joined, the destruction occurs completely in the immediate vicinity of the solidified adhesive layer in the substrate.