A locomotive semi-elliptical laminated spring has an overall length of 1 m and sustains a load of 70kN at its centre. The spring has 3 full length leaves and 15 graduated leaves with a central band of 100 mm width. All the leaves are to be stressed to 400 N/mm2 when fully loaded. The ratio of the total spring depth to that of width is 2. E = 0.2 x 106 N/mm2. Design leaf spring.
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