Question: Made from ASTM A313 spring wire operating under 0 to 1400N fluctuating load and 1500N load buckling between two parallel plates, which become solid by

Made from ASTM A313 spring wire operating under 0 to 1400N fluctuating load and 1500N load buckling between two parallel plates, which become solid by shortening 60mm in length when applied It is desired to design a closed-end helical compression spring that will operate without spring index 7, the average wire diameter of the spring with a load repetition number of 2 million and a factor of safety between 1-2 Find its diameter, number of active coils.

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