Applied load shall elongate the spring, Mechanical Engineering

Applied load shall elongate the spring:

Design a close coiled helical spring which shall deflect 100 mm under a load of 600 N. The radius of the coil is 6 times the wire diameter. The maximum shear stress is not to exceed 8 MPa. G = 80 GPa. What suddenly applied load shall elongate the spring by 100 mm?


Δ = 100 mm, W = 600 N, R = 6d, τmax  = 80 N/mm2 ,

G = 90 GPa = 80 × 103 N/mm2

τmax      = 16 W R / π d3

⇒         80 = 16 × 600 × (6d )/ π d 3

∴          d = 15.14 mm

R = 6d = 90.84 mm

Δ= 64 W R3 n / Gd 4

⇒         100 =64 × 600 × 90.843 × n/(80 × 103 ) (15.14)4

                        = n = 14.6

A suddenly applied load shall cause double the stress caused by same load if applied gradually. Therefore, in this case if same stress is to be induced in spring wire cross-section by suddenly applied load it shall be W/2  = 600/2 = 300 N .

Posted Date: 1/21/2013 1:14:22 AM | Location : United States

Related Discussions:- Applied load shall elongate the spring, Assignment Help, Ask Question on Applied load shall elongate the spring, Get Answer, Expert's Help, Applied load shall elongate the spring Discussions

Write discussion on Applied load shall elongate the spring
Your posts are moderated
Related Questions
(Buoyancy; force & moment balance) A partially submerged, homogeneous timber is 0.15m by 0.35m in cross-section. What is the specific weight of the timber and the tension in the r

Q. What do you mean by Shell and Tube Exchangers? Shell and tube exchanger piping shall be arranged to provide clearance overhead at both bonnet and channel ends. Piping shall

Find out bulk modulus: A steel bar of 25 mm diameter was tested on a gauge length of 250 cm in tension and in torsion. A tensile load of 50 kN generated an extension of 0.13 m

(a) What is the use of ball race drive? (b) How should one install the bottom cone race? (c) What is the use of front fork oil seal driver body and its attachment? (d) Wha

steam boilar

Explain the Principle of screw conveyer When materials are feed into the fixed chutes, due to action of gravity of materials and the friction force between material and chute t

Q. Define Carbon steel? At ambient temperatures and under dry conditions, caustic is not particularly corrosive and can be handled in carbon steel. However, stress corrosion c

Q .  Determine MI of unequal angle section 15cm × 10cm × 1.5cm with longer leg vertical and is flange upwards. Figure Sol. :                      A 1 = 10 ×

General Resource Models In  computer  controlled scheduling,    material,  machine handling  equipment,  tooling  and  buffer  space  should  be comprised. The explicit consid

Suspension System, Wheels and Tyres:  There are numerous types of suspensions for connecting the wheels to frame body. The suspension plays the vital role in handling and driving