Generally, somegreen cutting disc
will crack after being used for a period of time. Therefore, many users will ask why cracks appear. Can the cutting piece continue to be used after cracking? Today, the aurora abrasives are explained to you. .
The crack of the dicing sheet is mainly due to the fact that the dicing sheet cannot be plastically deformed like metal under the action of external force, but it is easy to concentrate the stress on a certain part, so that the part of the defect-crack source is rapidly transformed into a crack. Once the internal crack is formed and reaches a certain critical dimension, it is very easy to expand. The internal stress immediately concentrates on the tip of the crack and spreads to both sides of the tip. It cannot absorb the external force band by changing its shape like metal. The energy coming from can only absorb this part of the energy by forming a new surface. The expansion of the crack means the formation of two new surfaces.
That is to say, the crack spreads rapidly, and the new surface increases rapidly until the crack is formed or broken, and the applied energy is all converted into the energy produced by the new surface, so that the crack appears.