Investigation on Earing Behavior of AA 2024-T4 and AA 5754-O Aluminum Alloys

Deep drawn parts usually have different wall heights because of earing behavior. This behavior is due to the planar anisotropy (Delta r) of sheet metals. A measure of the variation of normal anisotropy with the angel to the rolling direction in sheet plane is known as planar anisotropy. If the magnitude of the planar anisotropy is relatively large as absolute value, the earing behavior becomes more effective so larger ears occur. Furthermore, the orientation of the sheet with respect to the die or the part to be formed will be important. In addition, cutting of scraps in the parts which have ears leads to material waste.