4. The rigid slab is supported by two identical copper rods as shown. The copper rod has an area of 500 mm? with a = 16.8 µm/ ( m°C ) and E = 120 GPa. There is a gap of 0.18 mm between the slab and the aluminum rod. The aluminum rod has an area of 400 mm? with a = 23.1 µm/ ( mºC ) and E = 70 GPa. %3D Compute the stress developed in each rod when the temperature is raised to 85°C. Assume that the weight of the slab is negligible. Answer: OAI = 16.80 MPa Aluminum Copper -750 mm -

4. The rigid slab is supported by two identical copper rods as shown. The copper rod has an area of 500 mm? with a = 16.8 µm/ ( m°C ) and E = 120 GPa. There is a gap of 0.18 mm between the slab and the aluminum rod. The aluminum rod has an area of 400 mm? with a = 23.1 µm/ ( mºC ) and E = 70 GPa. %3D Compute the stress developed in each rod when the temperature is raised to 85°C. Assume that the weight of the slab is negligible. Answer: OAI = 16.80 MPa Aluminum Copper -750 mm -

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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Free Body Diagram

The system of forces acting on a body tends to either rotate it or make the body undergo motion. In general, when an external agent exerts a force on a body, the body undergoes translational motion and rotational motion. The body has six degrees of freedom under the influence of that force. Here, three degrees of freedom are from the translational motion while the other three are from the rotation motion. However, sometimes the bodies are not allowed to undergo any motion and are fixed, under such conditions the body is said to be constrained.

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4. The rigid slab is supported by two identical copper rods as shown. The copper rod has an area of 500
mm? with a = 16.8 µm/ ( m°C ) and E = 120 GPa. There is a gap of 0.18 mm between the slab and the
aluminum rod. The aluminum rod has an area of 400 mm? with a = 23.1 µm/ ( mºC ) and E = 70 GPa.
Compute the stress developed in each rod when the temperature is raised to 85°C. Assume that the
weight of the slab is negligible.
Answer: OAI = 16.80 MPa
Copper
Aluminum
Copper
-750 mm

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