What is likely to happen if delamination of a composite structure is not repaired?

Delamination in a composite structure occurs when the layers of material separate from each other, compromising the integrity of the component. If delamination is left unrepaired, it can lead to a significant weakening of the structure. One of the primary outcomes of this weakening is broken fibers.

When the layers of the composite material start to separate, they can place excessive stress on the fibers themselves, leading to their failure. This is because composite materials derive their strength from the bonding between layers, and when that bond is compromised, the load distribution is altered significantly. As a result, the fibers may no longer be able to handle the loads they were designed for, causing them to break.

Engineers and technicians must address delamination promptly to prevent further damage, such as the possible fragmentation of structural integrity that can arise from on-going stress concentrations caused by the separation. Repairing delamination is critical to maintaining the overall performance and safety of the aircraft component.