What are the most common causes for delamination of a composite structure?

Delamination in a composite structure occurs when layers of the material begin to separate or peel away from one another. This separation can significantly reduce the structural integrity and performance of the composite. The most common causes of delamination are related to the quality of the manufacturing process and external forces acting on the structure.

Sonic vibration can induce stresses in laminated structures, particularly if the vibrations resonate at frequencies that excite the natural frequencies of the composite layers. This can lead to progressive damage and eventual delamination over time. Manufacturing errors, such as inadequate adhesive bonding between layers, improper curing, or insufficient pressure during lamination, can also create weak points within the composite structure, making it more susceptible to delamination.

Together, these factors represent critical aspects of composite materials management, emphasizing the importance of proper manufacturing techniques and understanding the environmental effects on these structures. By acknowledging these causes, maintenance personnel can implement preventive measures to avoid delamination and ensure the longevity and safety of composite components.