Compression springs are the most common spring configuration that product manufacturer's turn to when enhanced product functionality is required. You are required to design a compression spring that is made of oil-tempered wire of 4-mm diameter with a spring index of C=10. The spring will operate inside a pipe, so buckling is not a problem and select the ends to be plain. The free length of the spring should be 80 mm. A force of 50 N should deflect the spring 15 mm. a) Calculate the spring rate and the solid length. b) Calculate the total number of coils needed. c) Calculate the minimum pipe diameter for the spring to operate in. d) Calculate a static factor of safety based on the yielding of the spring if it is compressed to its solid length.

Compression springs are the most common spring configuration that product manufacturer's turn to when enhanced product functionality is required. You are required to design a compression spring that is made of oil-tempered wire of 4-mm diameter with a spring index of C=10. The spring will operate inside a pipe, so buckling is not a problem and select the ends to be plain. The free length of the spring should be 80 mm. A force of 50 N should deflect the spring 15 mm. a) Calculate the spring rate and the solid length. b) Calculate the total number of coils needed. c) Calculate the minimum pipe diameter for the spring to operate in. d) Calculate a static factor of safety based on the yielding of the spring if it is compressed to its solid length.

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 A gas engine valve spring is to have a mean diameter of 55 mm. The maximum load it will have to sustain is 584 N with a corresponding deflection of 7.18 mm. The spring is to be made of tempered wire. Since the material is to be subjected to repeated loading and fatigue must be considered a low working stress of 650 N/mm? will be used. Find the size for wire and number of coils used. Take modulus of rigidity as 0.84 x 105 N/mm? .Assume the spring coil is squared and ground. Take shear stress Concentration factor as 1.15.
Subject: mechanical
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Q3. Design a compressive helical spring which was made of alloy steel. The maximum applied load to the spring is 1000 N. The total number of the coils should be no more than 10 turns if a squared and ground ends spring used. The solid length is 60 mm. Neglecting the effect of stress concentration. What is (1) the energy stored in the spring. (2) axial deflection. (3) The mean diameter of coil. (4) The wire diameter. (5) Spring rate. If the applied load is shifted to the edge of the spring, farthest point from the centre of the spring, determine the load that the spring can carry it without failure.
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QUESTION 11 If a spring is made of OQ&T wire and has a wire diameter of 0.1 inch, what is ultimate strength in psi of the spring materials? QUESTION 12 A plain and ground helical compression spring has a free length of 6 inch. Calculate the pitch in inch if the spring has total 12 coils. QUESTION 13 Which of the following is not a recommended design condition for a helical compression spring? O a. E≤ 0.15 Ob.4≤ C≤ 12 Ocn 21.2 Od.3≤ ≤15
Spring stiffness is important as it is the measurement of the resistance offered by the elastic body to deform as such state TWO effects of spring stiffness in a helical compression springs when its original length is cut into half.
Two concentric springs are constructed with squared and ground ends from oil-hardened 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 lbf/in². The springs support a static force of 150 lbf. The spring dimensions and properties are as follows: Inner spring Wire diameter: 0.177 in Mean coil diameter: 1.5 in Total number of coils: 12.75 Free length: 4.5 in Outer spring Mean coil diameter: 2.0 in Wire diameter: 0.2253 in Free length: 3.75 in Total number of coils: 10.25 1. The deflection of the inner spring is most nearly A. 2.0 in B. 2.4 in C. 2.9 in D. 3.1 in 2.The maximum force exerted by the inner spring is most nearly A. 57 lbf B. 67 lbf C. 79 lbf D. 86 lbf 3. The maximum shear stress in the inner spring is most nearly A. 47 kips/in² B. 52 kips/in² C. 57 kips/in² D. 64 kips/in² 4. The factor of safety in shear for the inner spring is most nearly…
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.
! Required information A helical compression spring is made of hard-drawn spring steel wire of diameter 0.0773in. and has an outside diameter of 0.85 in. The ends are plain and ground, and there are 8 coils. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Will the spring buckle in service? The value of (LO)cr is
Solve it pls.