SPRINGSANDFLYWHEELE S M E C H A N I C A L E N G I N E E R I N G R E V I E W
ADDITIONAL PROPERTIES OF MATERIALS1.Fatigue2.Creep3.Impact4.Failure5.Buckling6.Ductile Fracture7.Brittle Fracture8.Residual Stress9.Warping
CLASSIFICATION OF SPRINGACCORDING TO FORCE APPLICATION1.Push Type•Helical Compression Spring•Belleville Spring•Torsion Spring: Force acting at the end of thetorque arm•Flat Spring, such as a cantilever or leaf spring2. Pull Type•Helical extension spring•Torsion Spring: Force acting at the end of thetorque arm•Flat Spring, such as a cantilever or leaf spring•Drawbar spring(special case of thecompression spring)/ Constant force spring3. Radial Torque Type•Garter spring•Elastomeric band•Spring clamp4. Torque Type•Torsion Spring•Power Spring
TYPES OF SPRING•Helical Compression Spring•Helical Extension Spring•Drawbar Spring•Torsion Spring•Leaf Spring•Belleville Spring•Garter Spring•Constant Force Spring•Wave Spring
SPRINGS•C = spring index•
SPRING CORRECTIONFACTORS•K = Wahl’s Factor
Wahl Stress Factor __________very rapidly as the spring indexdecreases.
Get answer to your question and much more
SPRING DEFORMATION,?=8? ?3??? ????=number of active coils
SPRING WORKW = Weighth = heightF = forcek = spring constantm = massv = velocity
1. A helical spring has a mean coil diameter of 1 inch and a wire diameter of1/8 inch. Determine the Bergstrasser factor of the spring.PROBLEM 1
2. A Coiled spring with 1 ¾ in outside diameter is required to work under load of140lb. Wire diameter used is 0.192 in spring with seven active coils, and the endsare to be closed and ground. Determine the safe shearing stress and the unitdeflection. Assume G equal to 12 million psi and mean radius to be 0.779 inches.