A helical compression spring is required to exert a force of 200N when compressed to a length of 70 mm. At a length of 85 mm, the force must be 80 N. A spring mean diameter is 35 mm. The application involves slow cycling, and a total life of 150 000 cycles is required. The maximum temperature of operation is 60°C. ASTM A401 chromium-vanadium steel with ferrous without pre-setting condition is used. 2.1 Determine the Design Shear Stress. 2.2 Calculate the WAHL factor and comment on the calculated value of the spring index.

A helical compression spring is required to exert a force of 200N when compressed to a length of 70 mm. At a length of 85 mm, the force must be 80 N. A spring mean diameter is 35 mm. The application involves slow cycling, and a total life of 150 000 cycles is required. The maximum temperature of operation is 60°C. ASTM A401 chromium-vanadium steel with ferrous without pre-setting condition is used. 2.1 Determine the Design Shear Stress. 2.2 Calculate the WAHL factor and comment on the calculated value of the spring index.

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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Question

A helical compression spring is required to exert a force of 200N when compressed to a
length of 70 mm. At a length of 85 mm, the force must be 80 N. A spring mean diameter is
35 mm. The application involves slow cycling, and a total life of 150 000 cycles is required.
The maximum temperature of operation is 60°C.
ASTM A401 chromium-vanadium steel with ferrous without pre-setting condition is used.
2.1
Determine the Design Shear Stress.
2.2
Calculate the WAHL factor and comment on the calculated value of the spring
index.

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