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

Determine the loading on the beam, Determine the loading on the beam: ...

Determine the loading on the beam: Shear force diagram for a loaded beam is illustrated in Figure. Determine the loading on the beam & therefore, draw the bending moment diagr

Resistance seam welding, Resistance Seam Welding This is similar to spo...

Resistance Seam Welding This is similar to spot welding except that the copper alloy electrodes are in the form of circular rollers. The overlapping sheets are held under const

Factors affecting the selection of boiler, F AC T OR S AFFECTING THE SE...

F AC T OR S AFFECTING THE SELECTION OF BOILER: -     Working Pressure and amount of steam needed. -     Floor area required. -     Operating and Maintenance Required

Working of a four-stroke engine , Working of a Four-stroke Engine: To unde...

Working of a Four-stroke Engine: To understand the working of a four-stroke motorcycle engine, the whole operation can be divided into four parts, known as strokes. The strokes ar

Define the binary vapour cycle, Write brief notes on the following : (a)...

Write brief notes on the following : (a) Draught System (b) Binary Vapour Cycle (c) Cooling Towers (d) Governing of steam turbines

Plate clutch movement on center clutch-clutch jerking, Plate clutch movemen...

Plate clutch movement on center clutch : Place plate clutch on centre clutch as shown in the picture and move the plate clutch up and down, while moving the plate clutch in the ce

energy method, A semi circular frame of flexural rigidity EI is built at A...

A semi circular frame of flexural rigidity EI is built at A and caries a vertical load W at B. calculate the magnitude of the vertical and horizontal deflection at B and hence the

Define the project scope, Q. Define the project scope? The Design Basis...

Q. Define the project scope? The Design Basis Memorandum defines the project scope. This includes basic design concepts and the basis and philosophies upon which the project s

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