Bonding strength refers to the stress required to cause failure at the interface between the adhesive and the bonded material or in the adjacent area of the adhesive part under external forces. It is one of the important indicators for evaluating the quality of adhesives.
Its magnitude depends not only on the adhesive force, the mechanical properties of the adhesive, the properties of the bonded material, and the bonding process, but also on factors such as the joint type, stress conditions (type, magnitude, direction, frequency), environmental factors (temperature, humidity, pressure, medium), testing conditions, and experimental techniques.