A helical compression spring is subjected to a maximum force, Fmax of 1250 N. The deflectionof the spring corresponding to the maximum force should be approximately 30 mm. The springindex is 6. The allowable shear stress is 350 MPa and the modulus of rigidity is 81 370 N/mm².Design the helical spring by calculating the wire diameter, mean coil diameter, number of activecoils and the total number of coils. State all assumptions and decisions in your design.

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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 length of 18 mm diameter steel wire is coiled to a close helical spring having 9 coils of 72 mm mean diameter, and the spring has a stiffness k. If the same length of wire is coiled to 9 coilsof 54 mm mean diameter, then the spring suffness will be
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.
Valne Parameter Whmade Shear Stress o Spring wire Modulus e ngidity e.SRing Smng Coil haanal chometes Deflection of Spring at allowable Shoar Stress Factor of Safe Wahl's shear Stress factor 800MPA 9AKN/mmf Wire 25mm 15mm K= HC-1+0:615 4C-4 Using he hafurmaton m table 1, desana helical Compresion Spring by detemindng; 9) Allowable Axial loudw turns n' of b) Actve number
Figure below shows a rod with mass M = 100 kg, cross section area A = 10 cm². The rod is supported by 4 springs having stiffnesses of k = 1 MN/m. A tip mass with m = 120 kg is attached to the rod. Assume x is the degree of freedom of the equivalent system. The Young's modulus, E, is not known. If the natural frequency of the equivalent mass-spring system is 40 Hz, determine the Young's modulus, E. Assume the length of the rod is L = 5 m. Find the nearest answer. k ww E, A, M k F @www.ww wint L 195 GPa 179 GPa 116 GPa 45 GPa 236 GPa 000 00
7. A spring is attached to the floor. When a 125 g mass is placed on top of the spring it compresses by 0.26 m. What is the spring constant of this spring?
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- 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. What is the pitch of this spring? What force is needed to compress the spring to its solid length? Estimate the spring rate. The pitch of the spring is in. The force needed to compress the spring to its solid length is lbf. The spring rate is lbf/in.
Write the global stiffness matrix of the spring assemblage shown. Assume that all springs remain horizontal, the vertical bars at nodes 2 and 3 are rigid and allowed to slide horizontally to the left or right. Node 1 K1 = 2000 lb/in K2 = 2000 lb/in Node 2 m K3 = 1500 lb/in K4 = 1500 lb/in Node 3 F = 250 lb ma K5 = 3000 lb/in Node 4
mass of 201bf of mass is hanging on a spring that is fixed on the ceiling. The spring used is Aluminum with a spring constant of 810 N/m. Solve for the a. Natural frequency, rad/s b. Frequency, Hz C. Period, s For Problem no. 3, which of the materials would give the minimum total deformation for the spring setup? Show your solution and compare the deformation for each material. Rank from material with least deformation to material with most deformation. a. Gold, 920 N/m b. Aluminum 8,10 N/m C. Titanium 1,450 N/m d. Platinum, 2,060 N/m
s 1c
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.

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