Delamination

Definition

Delamination refers to the separation of one layer from another in a composite material or structure.

Purpose

Understanding delamination is crucial for maintaining the integrity and performance of layered materials, such as laminated composites, coatings, and concrete. Detecting and addressing delamination helps prevent structural failures, reduce maintenance costs, and extend the lifespan of materials.

Examples of Use

1. Concrete Structures: Identifying delamination in concrete slabs and walls, where the top layer separates from the underlying material, leading to spalling and reduced strength.
2. Composite Materials: Detecting delamination in composite materials used in aerospace, automotive, and construction applications, which can compromise the mechanical properties and safety.
3. Coatings: Preventing delamination in protective coatings applied to metal surfaces, which can lead to corrosion and degradation of the underlying substrate.

Related Terms

• Spalling: The breaking or flaking off of surface layers from concrete or masonry structures, often associated with delamination.
• Laminated Composite: A material made up of multiple layers bonded together to achieve specific properties, such as strength or durability.
• Adhesion: The bonding strength between different layers or materials.

Notes

• Delamination can be caused by various factors, including poor bonding, thermal expansion, moisture infiltration, and mechanical stress.
• Regular inspections and maintenance are essential to detect early signs of delamination and address underlying causes.
• Repair methods for delamination include injection of adhesives, resurfacing, or complete replacement of affected layers.