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Problem 1: Steel rod AC (E=200GPA) having a cross sectional area of 250 mm?, jointly support the 10 kN load with spring DE having a flexibility of 0.0005mm/N and an unstretched length of 9m. Bar BCE is rigid. Assuming that there was no slack or stress in rod AC or spring DE before the load was applied; a. Determine the ratio of the deformation of rod AC to spring DE. b. Determine the force on rod AC in kN. 12m 9m c. Determine the force on spring DE (kN). w 12m Problem 2: A shaft is to be fitted with a flanged coupling having 6 bolts on a circle of diameter 150 mm and 4 bolts on a circle of diameter 100 mm. The shaft may be subjected to either a direct tensile load of 400 KN or a twisting moment of 18 kN-m. If the maximum direct tensile and shearing stresses permissible in the bolt material are 125 MPa and 55 MPa respectively. Find the minimum diameter of the bolt required. Assume that each bolt takes an equal share of the load or torque. Outer bolm Shaft circle Shaft Bolt Inner bolt Flange circle Brass - Copper Problem 3: A composite bar is made by attaching a copper rod of length 900 mm and diameter 30 mm and a brass rod of length 600 mm and diameter 45 mm as shown. A load of 20 kN is applied at 20°C. For unyielding supports, find the stresses in the materials when the temperature rises to 50°C. For copper, E = 120 GPa and +20 kN 900 mm 600 mm

Problem 1: Steel rod AC (E=200GPA) having a cross sectional area of 250 mm?, jointly support the 10 kN load with spring DE having a flexibility of 0.0005mm/N and an unstretched length of 9m. Bar BCE is rigid. Assuming that there was no slack or stress in rod AC or spring DE before the load was applied; a. Determine the ratio of the deformation of rod AC to spring DE. b. Determine the force on rod AC in kN. 12m 9m c. Determine the force on spring DE (kN). w 12m Problem 2: A shaft is to be fitted with a flanged coupling having 6 bolts on a circle of diameter 150 mm and 4 bolts on a circle of diameter 100 mm. The shaft may be subjected to either a direct tensile load of 400 KN or a twisting moment of 18 kN-m. If the maximum direct tensile and shearing stresses permissible in the bolt material are 125 MPa and 55 MPa respectively. Find the minimum diameter of the bolt required. Assume that each bolt takes an equal share of the load or torque. Outer bolm Shaft circle Shaft Bolt Inner bolt Flange circle Brass - Copper Problem 3: A composite bar is made by attaching a copper rod of length 900 mm and diameter 30 mm and a brass rod of length 600 mm and diameter 45 mm as shown. A load of 20 kN is applied at 20°C. For unyielding supports, find the stresses in the materials when the temperature rises to 50°C. For copper, E = 120 GPa and +20 kN 900 mm 600 mm

Elements Of Electromagnetics
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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Problem 1: Steel rod AC (E=200GPA) having a cross sectional area of 250 mm2, jointly support the 10 kN load with spring DE having a flexibility of 0.0005mm/N and an unstretched length of 9m. Bar BCE is rigid. Assuming that there was no slack or stress in rod AC or spring DE before the load was applied; a. Determine the ratio of the deformation of rod AC to spring DE. b. Determine the force on rod AC in kN. c. Determine the force on spring DE (kN). 12m 9m 12m 4m Problem 2: A shaft is to be fitted with a flanged coupling having 6 bolts on a circle of diameter 150 mm and 4 bolts on a circle of diameter 100 mm. The shaft may be subjected to either a direct tensile load of 400 kN or a twisting moment of 18 kN-m. If the maximum direct tensile and shearing stresses permissible in the bolt material are 125 MPa and 55 MPa respectively. Find the minimum diameter of the bolt required. Assume that each bolt takes an equal share of the load or torque. Outer bolt Shaft circle Shaft Bolt Inner bolt Flange circle Brass Problem 3: A composite bar is made by attaching a copper rod of length 900 mm and diameter 30 mm and a brass rod of length 600 mm and diameter 45 mm as shown. A load of 20 kN is applied at 20°C. For unyielding supports, find the stresses in the materials when the temperature rises to 50°C. For copper, E = 120 GPa and a = 18 x 10€ °C. For brass, E = 90 GPa and a = 20 x 106 °C. Copper 20 kN 900 mm 600 mm
Transcribed Image Text:Problem 1: Steel rod AC (E=200GPA) having a cross sectional area of 250 mm2, jointly support the 10 kN load with spring DE having a flexibility of 0.0005mm/N and an unstretched length of 9m. Bar BCE is rigid. Assuming that there was no slack or stress in rod AC or spring DE before the load was applied; a. Determine the ratio of the deformation of rod AC to spring DE. b. Determine the force on rod AC in kN. c. Determine the force on spring DE (kN). 12m 9m 12m 4m Problem 2: A shaft is to be fitted with a flanged coupling having 6 bolts on a circle of diameter 150 mm and 4 bolts on a circle of diameter 100 mm. The shaft may be subjected to either a direct tensile load of 400 kN or a twisting moment of 18 kN-m. If the maximum direct tensile and shearing stresses permissible in the bolt material are 125 MPa and 55 MPa respectively. Find the minimum diameter of the bolt required. Assume that each bolt takes an equal share of the load or torque. Outer bolt Shaft circle Shaft Bolt Inner bolt Flange circle Brass Problem 3: A composite bar is made by attaching a copper rod of length 900 mm and diameter 30 mm and a brass rod of length 600 mm and diameter 45 mm as shown. A load of 20 kN is applied at 20°C. For unyielding supports, find the stresses in the materials when the temperature rises to 50°C. For copper, E = 120 GPa and a = 18 x 10€ °C. For brass, E = 90 GPa and a = 20 x 106 °C. Copper 20 kN 900 mm 600 mm
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