It is required to design a helical torsion spring and Cold-drawn steel wire of Groele 4. The yitld strength the ultimate tensile strength, and the factor of Safety is 2. from space Considerations, the...

Extracted text: It is required to design a helical torsion spring and Cold-drawn steel wire of Groele 4. The yitld strength the ultimate tensile strength, and the factor of Safety is 2. from space Considerations, the spring Per a window-shade. The is made of patented of the material is 60l. mean Coil. diameter is kept as 18 mm. The maximum be- Inding moment asting on the spring is e5oN-mm. The modulng of elas ticity of the kNlmm?). The stiffness of the rad). Determine the wire diameter and the um Coils. Also, detesmine the deflectino and stored struin.energy. spring spring moterial is (207 should be(3 N-mm/ berof active