Open coiled helical spring, Mechanical Engineering

Assignment Help:

Open coiled helical spring:

In an open coiled helical spring along with α = 38o, if the inclination of the coil is ignored, determine the percentage by which the axial extension is under estimated.

E = 200 GPa, G = 80 GPa.

Solution

Δ= (64 W R3 n / d 4 cos α)( (cos2 α/G)+(2 sin 2 α /E))

            = K/ cos α[cos2 α/G     +2 sin 2 α/E]

α= 38o , Δ = K × (0.115/0.866) × 10- 4  = K × 0.0147

If α is neglected,

α= 0, Δ2  = K × 0.0125

% Error = ((Δ1 - Δ2 ) / Δ1 )× 100

= (0.0147 - 0.0125/0.0147) × 100 = 14.96%


Related Discussions:- Open coiled helical spring

Design of connecting rod, Design of Connecting Rod: Design and analyse...

Design of Connecting Rod: Design and analyse the stress distribution in a connecting rod as shown in Figure 5. The axial load which the connecting rod carries is 1kN and the m

What is vibration?, Describe vibration, How to calculate vibration?

Describe vibration, How to calculate vibration?

Evaluate the springs force necessary to set the brake, A Double shoe brake ...

A Double shoe brake is capable of absorbing a torque of 1400 N-m. The diameter of the brake drum is 350 mm and the angle of contact for each shoe is 100 o . if the coefficient of f

Slider crank mechanism, What is the mathematical displacement equation and ...

What is the mathematical displacement equation and its derivatives?

Calculate change in internal energy of the gas, (a) Illustrate First Law of...

(a) Illustrate First Law of Thermodynamics for a Closed System undergoing a change of state and show that ‘Energy' is a property of the system. (b) A cylinder contains 1 m 3 of

Motion on the inclined plane when the surface is smooth, Motion on the incl...

Motion on the inclined plane when the surface is smooth: Sol:  WHEN THE SURFACE SMOOTH   The Figure given shows a body having weight W, sliding down on a smooth in

Inspection of fasteners of motorcycle, Inspection of Fasteners: The motorc...

Inspection of Fasteners: The motorcycle carries number of nuts and bolts. They should be properly tightened for the smooth running of motorcycle. All fasteners are checked

Calculate the tension t in the rope, Calculate the tension T in the rope: ...

Calculate the tension T in the rope: Q: A man raises 10 Kg joist of length 4m by pulling on rope, Find out the tension T in the rope and reaction at point A for the posit

Describe law of gearing, Determine an expression for the minimum number of ...

Determine an expression for the minimum number of teeth on a pinion which is in mesh with a rack in order to avoid interference and show the minimum number of teeth needed on a pin

Process selection in making a simple part, Process Selection in Making a Si...

Process Selection in Making a Simple Part You should first determine the part's function, the types of load and environment to which it would be subjected, the dimensional to

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd