A helical compression spring has a scale of 500 lb/in., an outside diameter of 2.75 in, a free length of 8 inches and with squared and ground ends. The load is 1,000 lbs and the working stress on the wire material is 65000 psi. If the Wahl factor of 1.25 is to be used, calculate the following: A. The standard wire diameter B. The number of active coil if G = 10 800 000 psi C. The solid height D. The stress at solid height

A helical compression spring is required to provide a minimum force of 150 lb at installation and have a working deflection of 1 in. The spring rate is 75 lb/in. The coil must fit in a 2.1-in-dia hole with 0.1 in total clearance. Use 0.25-in diameter unpeened music wire and squared/ground ends. Use a 15% clash allowance, shear modulus G = 11.5 Mpsi, and weight density γ = 0.285 lb/in3. Assume Sys = 0.6Sut. Part A Find the shear stress at the initial deflection. Express your answer in pounds per square inch to three significant figures.         τiτi =       Part B Find the mean stress. Express your answer in pounds per square inch to three significant figures.     Part C Find the alternating stress in the coil. Express your answer in pounds per square inch to three significant figures.     Part D Find the fatigue safety factor for infinite life in shear. Express your answer using three significant figures.…

A helical compression spring has (8 total coils) is inserted in a hole of diameter (76.5 mm).The spring is made of (12.5 mm) diameter hard drawn steel wire. The spring supports an axial load of (5 kN). Determine maximum stress and total deflection in the spring. Use closed and ground ends.

Pravinbhai