Sammenhæftning

Sammenhæftning is the Danish term for the process of forming a bond between surfaces or parts, producing a single, unified assembly. The word combines sammen (together) and hæftning (attachment or bonding). In engineering and materials science, sammenhæftning refers to methods by which materials are joined so that they behave as a single component.

Bonding methods include adhesive bonding (using glues or epoxies), mechanical bonding (interlocking features, knurling, or threaded connections), and metallurgical or thermomechanical processes such as welding, brazing, soldering, or diffusion bonding. The choice depends on materials, required strength, service conditions, and manufacturing constraints. Key factors are surface preparation, cleanliness, and wettability for adhesives, and temperature, pressure, and time for heat-based processes.

Bond strength is typically evaluated by tests that measure tensile, shear, or peel resistance. Failures are categorized as adhesive (at the interface) or cohesive (within the adhesive or substrate). A full understanding of sammenhæftning requires considering material properties, geometry, and the intended load path.

See also: bonding, adhesion, cohesion, welding, soldering, brazing, diffusion bonding.