I wo concentric springs are constructed with squared and ground ends from Oll-nardened steel. The ultimate strength for the steel is 204,000 lbf/in2. The steel's yield strength is to be estimated as 75% of the ultimate strength. The shear modulus for the steel is 11.5 x 106 bf/in? . The springs support a static force of 150 Ibf. The spring dimensions and properties are as follows: Inner spring Mean coil diameter: 1.5 in Total number of coils: 12.75 Wire diameter: 0.177 in Free length: 4.5 in Outer spring Mean coil diameter: 2.0 in Free length: 3.75 in Total number of coils: 10.25 Wire diameter: 0.2253 in A,The deflection of the inner spring is most nearly В. 2.4 in А. 2.0 in C. 2.9 in D. 3.1 in B. The maximum shear stress in the inner spring is most nearly B. 52 kips/in2 A. 47 kips/in2 C.57 kips/in2 D.64 kips/in2 C.The factor of safety in shear for the inner spring is most nearly С. 1.8 А. 1.2 В. 1.5 D. 2.2

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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1. Two concentric springs are constructed with squared and ground ends from oil-hardened steel.
The ultimate strength for the steel is 204,000 Ibf/in2 . The steel's yield strength is to be estimated
as 75% of the ultimate strength. The shear modulus for the steel is 11.5 x 106 bf/in? . The springs
support a static force of 150 Ibf. The spring dimensions and properties are as follows: Inner spring
Mean coil diameter: 1.5 in
Wire diameter: 0.177 in
Free length: 4.5 in
Outer spring
Mean coil diameter: 2.0 in Free length: 3.75 in
Total number of coils: 10.25
Total number of coils: 12.75
Wire diameter: 0.2253 in
A,The deflection of the inner spring is most nearly
А. 2.0 in
B. The maximum shear stress in the inner spring is most nearly
B. 2.4 in
C. 2.9 in
D. 3.1 in
A. 47 kips/in2
B. 52 kips/in2
C.57 kips/in2 D.64 kips/in2
C.The factor of safety in shear for the inner spring is most nearly
С. 1.8
В. 1.5
D. Specify the winding helix direction for each spring.
А. 1.2
D. 2.2
norallel
right hond R
C olockwice
roverce
OPEN IN...
Transcribed Image Text:1. Two concentric springs are constructed with squared and ground ends from oil-hardened steel. The ultimate strength for the steel is 204,000 Ibf/in2 . The steel's yield strength is to be estimated as 75% of the ultimate strength. The shear modulus for the steel is 11.5 x 106 bf/in? . The springs support a static force of 150 Ibf. The spring dimensions and properties are as follows: Inner spring Mean coil diameter: 1.5 in Wire diameter: 0.177 in Free length: 4.5 in Outer spring Mean coil diameter: 2.0 in Free length: 3.75 in Total number of coils: 10.25 Total number of coils: 12.75 Wire diameter: 0.2253 in A,The deflection of the inner spring is most nearly А. 2.0 in B. The maximum shear stress in the inner spring is most nearly B. 2.4 in C. 2.9 in D. 3.1 in A. 47 kips/in2 B. 52 kips/in2 C.57 kips/in2 D.64 kips/in2 C.The factor of safety in shear for the inner spring is most nearly С. 1.8 В. 1.5 D. Specify the winding helix direction for each spring. А. 1.2 D. 2.2 norallel right hond R C olockwice roverce OPEN IN...
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