Carbon Fiber - 0150 Damage & Defects Debond & Disbond

A disbond refers to the separation of a bonded joint or interface. It occurs when a bonded layer, such as a pre-cured skin, lacks cohesion with another layer. Disbonds may not be visible externally, and if tightly or weakly bonded, they can be challenging to detect. They often result from poor adhesion due to inadequate surface preparation or from in-service loading and impact damage.

In simple terms, a disbond is the separation of the composite material from another material to which it was adhesively bonded.

A kissing bond describes a scenario where two surfaces are only partially bonded or are disbonded but remain in contact or in very close proximity. These bonds are especially difficult to detect due to their tightness and lack of visible indicators, making them more likely to be overlooked compared to conventional disbonds.