Review of tests for adhesion strength.

This review discusses potential measurement methods for characterising and quantifying the interfacial adhesion strength properties that are key to the strength properties that are key to the strength of bonded systems. Some approaches for including properties of the interface in design calculations are outlined. Tests for adhesive joints, fracture toughness and engineering coatings are covered. Since the conditions causing initiation of failure are critical, methods for detecting the start of a fracture are discussed. Although there is a plethora of methods available, only a few are capable of providing quantitative data that can be readily used in design calculations.