科研之友
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摘要
The edge milling process of carbon fiber-reinforced plastics (CFRPs) is often accompanied by delamination and burrs on slot edges of the top layer. These damages impact on processing quality, processing efficiency, strength, and fatigue life of the materials, etc. To investigate the occurrence of these damages, the analytical cutting model for a single fiber of the top layer is established based on the Winkler elastic foundation beam theory. The critical fiber cutting angles and the corresponding engagement angles with different initial fiber orientations are predicted. Then, the milling experiments with the initial fiber orientations theta (0) = 90A degrees are carried out. The results show that the occurrences of the burrs and delamination can be correctly predicted. The suitable initial fiber orientations are chosen in the range from 30 to 60A degrees for the smoother slot edges. There are two burr occurrence zones (BOZs) when theta (0) = 90A degrees. The delamination-inhibited zone (DIZ) is usually in the burr occurrence zone (BOZ).
