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.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

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P1
F
h1
P2
P2
E
t2
d2
h2
B
A
h3
D
C
12
Figure 1

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