5.1 Calculate the final bend radius for a 3 mm thick 6061 T6 aluminum plate that is formed using a forming punch with an 8 mm radius, as shown in Figure 3. R 8 Figure 3: Bend profile that is formed using a V-block die and a punch with a 8 mm radius 5.2 Explain why there would be a difference between the initial and final bend radius during the bending process and how this occurrence depends upon material properties, sheet thickness and the bend radius.

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