7.1.2 Cohesive Failure

7.1.2 Cohesive Failure

Cohesive failure occurs when a fracture appears within the adhesive. In this failure mode, the adhesion strength was not exceeded, meaning that the bond between the substrate and the adhesive was not compromised; rather, the adhesive was overcome by external forces. This means that adhesion to the surface is stronger than the intermolecular bonds of the adhesive. As shown in Figure 210, the adhesive residue is visible on both substrates. This failure mode is common in uncured or insufficiently cured adhesives.

Figure 209 Cohesive failure on mild steel
Figure 209 Cohesive failure on mild steel Figure 209 Cohesive failure on mild steel

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