18 января, 2016 
Pokraskin Cohesive failure is when the failure mode is through the adhesive bond line. Inspection of the failed adhesive will show adhesive remaining on both surfaces (Figure 10.7).
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Figure 10.7 Cohesive failure of the adhesive |
If this is the failure mode then the adhesive itself should be investigated. Thinner bond lines are often stronger (especially under shear or tensile loading) but it may be that in some applications a lower modulus adhesive may prove to be better suited if shock or impact resistance is required as these can help to absorb and distribute the high stresses associated with high impact or peel loading. Alternatively a stronger adhesive will be necessary to increase the strength of the bond.
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