2) The extension spring shown in figurehas full-twisted loop ends. The materialInside dia. 50 mmis BS 5216 Grade 2. The spring has 84coils and is close-wound with a preloadof 80 N.a) Find the closed length of the spring.b) Find the torsional stress in the spring5 mmcorresponding to the preload.c) Estimate spring rate.5 mmd) What load would cause permanentdeformation?e) What is the spring deflectioncorresponding to the load found in partSunning length= 100 mmAssembled length= 180 mmFree length= 200 mm

(a) no. of coils in spring, n=84 Dia. of wire, d =5mm inside dia. of spring coil, Di =50mm…

2) The extension spring shown in figure has full-twisted loop ends. The material is BS 5216 Grade 2. The spring has 84 coils and is close-wound with a preload of 80 N. a) Find the closed length of the spring. b) Find the torsional stress in the spring corresponding to the preload. c) Estimate spring rate.

2) The extension spring shown in figure has full-twisted loop ends. The material is BS 5216 Grade 2. The spring has 84 coils and is close-wound with a preload of 80 N. a) Find the closed length of the spring. b) Find the torsional stress in the spring corresponding to the preload. c) Estimate spring rate.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter6: Stresses In Beams (advanced Topics)

Section: Chapter Questions

Problem 6.3.1P: Repeat Problem 6.2-17 but now use a transformed-section approach.

See similar textbooks

Similar questions

Homework 1. Solve the problem by starting with origin at ground? Hint: you should get the same results with t= 2sec and s= 20.4 m
A spring leaf is made with an unknown material and has a width of 2.7 inches, a thickness of 5/16 inches, and a length of 1 yard. The leaf spring has 2 full-length leaves and 5 graduated leaves. For a load of 1.5 kN, the leaf spring deflects 115 mm. A.) Find the modulus of elasticity of the spring steel used in the leaf spring in ksi. B.) Using the modulus of elasticity, find the stress experienced by the material in MPa of the strain is 0.015. Answer in the Given-Required-Solution format. Show the unit analysis and the answer should be at least in 4 decimals. Subject: Machine Design
(5) A gas engine valve spring is loaded to 35kgf when the valve is closed & 52kgf hen the valve is open. The valve lift is 8mm. The outside diameter is to be from 38mm~45mm, & the permissible stress is 413N/mm2 . Determine: (a) the wire & outside diameter; (b) the number of effective coils; (c) the free length when it is squared & ground.
Repeat Problem 6.2-17 but now use a transformed-section approach.
Three extension springs are hooked in series and supports a weight of 70 kg. One spring has a rate of 0.209 kg ∕mm and the other two have equal spring rate of 0.643 kg ∕mm. Find the deflection.
5.1 Determine the spring constant of the spring arrangement if all springs have the same spring constant. 5.2 In a compound helical spring, the inner spring is concentric with the outer spring, but is 9 mm shorter. The outer spring has ten coils of mean diameter 24 mm, and the wire diameter is 3 mm. Find the stiffness of the inner spring if an axial load of 150 N causes the outer spring to compress 18 mm. If the mean coil diameter for the inner spring is 15.94 mm, find the wire diameter of the inner spring when it has eight coils. Both the springs are made of the same material having G = 77 GPa.
Find the number of active coils of a No. 10 wire Helical Spring index of 7, steady load with spring rate of 46.5 lb/in. maximum allowable stress is 70 ksi. The stiffness of a spring is 98 N/mm of axial compression. Find the Joules of work to increase the compression from 60 mm to 90 mm.
mechanical engineering (Machine design) (1)Find the torque and power that a shaft with a diameter of d=50 mm can safely carry at n=200 rpm. (safe shear stress value will be taken as Sem-80N/mm² for the shaft material).
A spring sustains 200 ft-lb of energy with a deflection of 3’’. Assume that the mean coil diameter is 7 times the wire diameter and that the allowable stress is 100ksi. Determine the wire diameter.
Two coaxial closed coil springs make up a standard compound helical spring. When both springs are unloaded, they are not of equal length. If each spring's working stress is to be the same. The wire material has an 80 GPa modulus of rigidity. Find the diameter of steel wire for inner spring and stiffness of inner spring. Also find the stiffness of the compound spring. Outer spring a: Mean coil diameter = 100 mm No. of turns = 15 Wire diameter = 12.5 mm Inner spring b: mean coil diameter = 75 mm No. of turns = 20
Please solve all I give thumb up A drive system consists of single strand chain running on a 22 tooth drive sprocket at 1600 rpm. The pitch of the chain is 1/2". The driven sprocket and shaft must turn at 280 rpm. Using center distance = D + (0.5)d, find the a) required number of teeth on driven sprocket b) sprocket pitch diameters (driver and driven) c) total chain length in inches d) chain velocity in feet per minute
A helical compression spring having 14 active coils is close coiled. It has a spring stiffness of 400lb/in. It is cut into two springs having 6 and 8 turns. Determine the spring stiffnesses of resulting springs.