Fracture pattern

A fracture pattern describes the appearance of a fracture after the destruction of the bond (cf. adhesion, cohesion, bonded fracture or mixed fracture).

In addition to a value for the bond strength (lap shear strength, peel resistance), which is determined differently depending on the test, the course of the fracture provides important information.

A distinction is made, among other things:

• Fracture between adhesive and adherend: adhesive fracture (adhesion)
• Fracture in the adhesive: cohesive fracture (cohesion)
• Breakage of the adherend: Breakage of the adherend
• Various forms of mixed herd
• Material tearing, material delamination (e.g. with fiber-reinforced plastic).

Fracture pattern analysis is an important part of all materials science and is used to monitor the quality and integrity of materials.