A helical spring made of hard-drawn wire having G = 29 GPa, supports a continuous load. Given: d = 6 mm, D = 30 mm, r. = 20% Design Requirements: The ends are squared and ground; one end is free to tip. In the most-compressed condition, the force is 600 N: after 13 mm of release, the minimum force is 340 N. Determine: a. The factor of safety based on the Soderberg criterion. b. The free height. c. The surge frequency. d. Whether the spring will buckle in service.

A helical spring made of hard-drawn wire having G = 29 GPa, supports a continuous load. Given: d = 6 mm, D = 30 mm, r. = 20% Design Requirements: The ends are squared and ground; one end is free to tip. In the most-compressed condition, the force is 600 N: after 13 mm of release, the minimum force is 340 N. Determine: a. The factor of safety based on the Soderberg criterion. b. The free height. c. The surge frequency. d. Whether the spring will buckle in service.

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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a helical compression spring with squared and ground ends is ti be made of a steel wire 79 gpa and presetting is to be used. the operation load of the spring can be considered static. If the maximum working force is 292 N and a force of 35 N is required when the spring is 30 mm longer, determine the spring constant k
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1/A coil spring with plain ends that are ground is to operate with a load that fluctuates between 200 and 400 N, during which the deflection is to vary by 13 mm. Steel spring wire is to be used with a mean coil diameter D of 51 mm as shown in figure (1). Determine appropriate value for safety factor for this case, and find the other dimensions of the spring. If the spring material is steel with the ultimate strength of 2010 MPa and the rigidity of 80 GPa.