The purpose of polishing into rounded corners during carbon fiber sheet reinforcement is to reduce stress concentration and enhance the structural performance of the material. The following are the main reasons why carbon fiber sheet reinforcement needs to be polished into rounded corners:

Stress dispersion: Sharp edges or corners can lead to stress concentration, increasing the stress and strain of the material in that area. This may lead to material damage or cracking. By grinding the edges into rounded corners, stress can be dispersed and stress concentration reduced, improving the strength and durability of the structure.

Optimizing load transfer: The purpose of carbon fiber sheet reinforcement is to transfer loads from damaged or weak areas to the reinforcement material. Polishing into rounded corners can provide a better load transfer path, allowing force to be more evenly distributed in the reinforcement area and reducing stress concentration in the material.

Prevent damage: Sharp edges and corners may cause damage to carbon fiber sheet during installation or use. Polishing into rounded corners can reduce the risk of damage to carbon fiber sheet and avoid fiber breakage or cracking at edges or corners.

Improving appearance: Polishing to rounded corners can also improve the appearance of reinforced areas. The rounded edges are smoother and more uniform, making the reinforced structure look more aesthetically pleasing.