Open coiled helical spring, Mechanical Engineering

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.


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%

Posted Date: 1/21/2013 1:29:00 AM | Location : United States

Related Discussions:- Open coiled helical spring, Assignment Help, Ask Question on Open coiled helical spring, Get Answer, Expert's Help, Open coiled helical spring Discussions

Write discussion on Open coiled helical spring
Your posts are moderated
Related Questions
sir, you are doing such a great thing.but my suggestion is that please u put some engineering problems to solve. for engineering student like me.

have assignment in FEM calculation and ANSYS are you able to solve this kind of assignment

Cast Al Alloys Low melting temperature, good surface finish and insolubility to gases except H 2 are characteristics of these alloys. Significant drawback of cast aluminium a

Q. Show PMI testing of alloy materials? Suppliers and Construction Subcontractors are required to verify or conduct PMI testing of alloy materials that they procure and use and

Nominal Stress and True Stress: Nominal stress is the ratio of force per initial cross sectional area (original area of cross section). Nominal stress = Force / initial ar

A lifting shackle in a glass-making factory is made from a special high-temperature stainless steel. It is expected that the shackle will experience a tensile load of 5kN and th

Improvements Required - Industrial Safety The outlining of association of safety engineering, as done above, with quality, productivity, profit etc. has also tended to make im

The 70m microwave transmission tower is steadied by three guys cable. Cable AB carries a tension of 12kN. Express the corresponding force on point A as a vector

Define the nature of force in a member of truss: How can you define the nature of force in a member of truss? Sol.: We know that whenever force is applied on a cross se

Initial Graphics Exchange Specifications (IGES) The basic concept of IGES is concerned with the exchange of product description data from one CAD system to another one. The CAD