Machine Design
The ultimate strength of steel in tension in comparison to shear is in the ratio of

0.085416666666667
0.042361111111111
0.084027777777778
0.12638888888889

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Make M/I constant throughout the length of the leaf
Permit each leaf to act as an overhanging beam
Obtain variable moment of inertia (I) in each leaf
Have variable bending moment (M) in each leaf

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