Example: 2. A compression helical spring is made from alloy steel wire of 5 mm diameter and has outside diameter of 80 mm . If the permissible shear stress is 375 MPa and modulus of rigidity \( 85 \mathrm{kN} / \mathrm{mm}^{2} \), determine the axial load which the spring can carry and the deflection per active turn.Take all the factors into account. Given : d \[ \begin{array}{ll} \mathrm{d} & =5 \mathrm{~mm} \\ \mathrm{D}_{0} & =80 \mathrm{~mm} \end{array} \]
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- Wire diameter, \( d = 5 \, \text{mm} \) - Outside diameter, \( D_0 = 80 \, \text{mm} \) - Permissible shear stress, \( \tau = 375 \, \text{MPa} \) - Modulus of rigidity, \( G = 85 \, \text{kN/mm}^2 = 85,000 \, \text{N/mm}^2 \) Show more…
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A helical compression spring made of oil tempered carbon steel, is subjected to load which varies from 500 N to 1000 N. The spring index is 6 and the design factor of safety is 1.25. For calculation purpose consider the yield stress in shear is 770 MPa and endurance stress in shear is 350 MPa, compression of the spring at the maximum load is 30 mm and modulus of rigidity for the spring material is 80 GPa. find Size of the spring wire; Diameters of the spring; Number of turns of the spring; and Free length of the spring:
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