3- (10 pts) A helical compression spring with squared and ground ends is to be made of unpeened music wire. The load on

[answerhappygod]

3 10 Pts A Helical Compression Spring With Squared And Ground Ends Is To Be Made Of Unpeened Music Wire The Load On 1 (32.1 KiB) Viewed 16 times

3- (10 pts) A helical compression spring with squared and ground ends is to be made of unpeened music wire. The load on the spring varies between 10 and 50 N. The maximum shearing stress in the spring should occur at a solid length of 20 mm under load of 55 N and must not exceed 0.4 sy. Inside diameter and wire diameter are 20 mm and 2.5 mm, respectively. The spring held between flat parallel plates. - Determine values for the spring index, number of active coils, the spring constant, and the free length of the spring, - Make all necessary checks regardless of whether or not any of the requirements are satisfied. - What is the maximum frequency of the applied load for safe operation? - Find the factor of safety for fatigue (use Goodman) and yielding. For steel: unit weight = 78000N/m', modulus of rigidity = 79 GPa. Assume S,,=0.41S. and Sn=310 MPa.