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

See similar textbooks

Similar questions

Solve it
Solve 5,6
subject: statics of rigid bodiesPlease be tidy and readable, as well as presenting your solutions.
NO CURSIVE
A hollow circular shaft of inner radius 10mm, outer radius 20mm and length 1m is to be used as a torsional spring. If the shear modulus of the material of the shaft is 150 GPa, Calculate the torsional stiffness of the shaft (in kN-m/rad).
TOPIC: Machine Design Multiple choice Note: Please also provide a solution that proves the correct answer.
Pravinbhai
A helical compression spring is needed to fit over a 0.5 in. diameter rod. To allow for some clearance, the inside diameter of the spring is to be 0.6 in. To ensure a reasonable spring size, assume a spring index of 10. The spring is to be used in a machine where it will be repeatedly compressed from a free length of 5 in. to its solid length of 2 in. and then released. The spring should have squared and ground ends and is to be made from a cold-drawn A227 wire. (a) Determine a suitable wire diameter. (b) Determine a suitable total number of coils. (c) Determine the spring rate. (d) Where is the maximum stress in the wire of the spring? (e) Determine the static factor of safety when compressed to its solid length. (f) If the spring is to be designed for infinite life, what will be the mean stress and alternating stress on the spring. (g) Calculate the weight of the spring.
A bracket shown in Fig.(2) is fastened to the wall by four bolts equispaced on a (10 cm) diameter bolt circle. The bracket is subjected to a fluctuating force (0-50 N) . Find the forces acting on each bolt and then choose a suitable bolt size and a preload that will give minimum safety factor (1.5) for any mode of failure.
Required information A helical compression spring is wound using music wire of diameter, d, 2.16 mm. The spring has an outside diameter, OD, of 27 mm with plain ground ends and 14 coils. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. What is the force needed to compress this spring to closure assuming that the spring will reach its shear strength at its solid length? The force needed to compress this spring to closure is |N.