QUESTION 1 A punch shown in Figure 1 is used to make a hole in a metal plate with thickness h3. The punch assembly is made of a hollow circular shaft with a material having a yield stress of oy = 400 MPa and Young's modulus E = 96 GPa. Load P, is acting at the top F while load P2 is uniformly distributed around the cap plate at E. Given that P, = 200 kN, P2 = 100 kN, I, = 80 mm, I2 = 120 mm, h, = 300 mm, h2 = 300 mm and h3 = 50 mm. a) Determine the minimum required dimensions d, and d2 to the nearest mm under the application of maximum allowable stress. Apply a factor of safety F.S. = 2 against yielding. Given that t, = 10 mm and t2 = 8 mm. b) Based on the values of d, and d2 in (a), evaluate the average compressive stress at section FE and EA as well as punching shear stress through a circular surface through AC dan BD. Assume that t, = 12 mm and t2 = 10 mm. c) Suggest one material that can be punched and explain why. Also, suggest the maximum thickness that can punched for a 6061-T6 aluminium alloy plate.

QUESTION 1 A punch shown in Figure 1 is used to make a hole in a metal plate with thickness h3. The punch assembly is made of a hollow circular shaft with a material having a yield stress of oy = 400 MPa and Young's modulus E = 96 GPa. Load P, is acting at the top F while load P2 is uniformly distributed around the cap plate at E. Given that P, = 200 kN, P2 = 100 kN, I, = 80 mm, I2 = 120 mm, h, = 300 mm, h2 = 300 mm and h3 = 50 mm. a) Determine the minimum required dimensions d, and d2 to the nearest mm under the application of maximum allowable stress. Apply a factor of safety F.S. = 2 against yielding. Given that t, = 10 mm and t2 = 8 mm. b) Based on the values of d, and d2 in (a), evaluate the average compressive stress at section FE and EA as well as punching shear stress through a circular surface through AC dan BD. Assume that t, = 12 mm and t2 = 10 mm. c) Suggest one material that can be punched and explain why. Also, suggest the maximum thickness that can punched for a 6061-T6 aluminium alloy plate.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.4.1P: The assembly shown in the figure consists of a brass core (diameter d:= 0.25 in.) surrounded by a...

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