1. A safety valve must start opening when the force is equal to 777.48N, and be fully openwhen (20mm spring compression) at a force of 812.82N. The spring should not be more than90mm outside diameter, with the maximum shear stress under 1100MPA. The material usedhas a shear modulus of (G = 77.2 GPa). Determine the springs Mean Diameter, Wirediameter, Number of active coils and unloaded Length.DC =d4С — 10.6158FDKwT = K,-nd³+4С — 4C-8FD³Ny =8FD³NdªG1+2C²dªG

Answered: Image /qna-images/answer/c286cdf8-59e6-467b-9cb0-673bed14cd97.jpg

Answered: A safety valve must start opening when…

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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The ratio of stress to bulk modulus for compression of the material. Select the correct response. Dilatation Modular ratio Bulk's ratio Deformation < Previous
A helical compression spring is wound using 4 mm-diameter Chrome-vanadium wire. The spring has an outside diameter of 28 mm with squared and ground ends, and 14 total coils: (a) What should the free length be to ensure that when the spring is compressed solid the torsional stress does not exceed the yield strength, that is, that it is solid-safe? (b) What force is needed to compress this spring to closure? (c) Estimate the spring rate. (d ) Is there a possibility that the spring might buckle in service?
Compute the minimum vine diameter to provide a desired factor of safety of 1.7 against yield-type failure. Assume a yield stress of 300 MPa, and that the mass of the monkey is 65 kg. Hint Weight (N) = Mass (Kg) X g (9.81 m/s2)
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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.
The material is a spring wire has a shear modulus of 1.2 x 107 lbf/in2. The maximum allowable stress under design conditions is 50,000 lbf/in2. The spring index is 7. Assume the maximum stress is experienced when a 700 lbm object falls from a height of 46 in above the tip of the spring, impacts squarely on the spring, and deflects the spring 10 in. Determie:1. The minimum wire diameter is most nearlyA. 0.58 in B. 0.88 in C. 1.4 in D. 1.8 in2. The mean coil diameter is most nearlyA. 8.6 in B. 10 in C. 13 in D. 16 in3. The number of active coils is most nearlyA. 8 B. 11 C. 12 D. 14
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For Hibiscus and Rose Groups A steel helical spring is wound from No. 14 music wire with a mean helix diameter of 0.6 in. The load varies continuously between 10 and 4 Ib. Find the factor of safety.

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