From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Page 2 of a report on spring mechanics, discussing the effects of curvature, stress, and deflection with formulas.
| Identifier | ExFiles\Box 168\3\ img320 | |
| Date | 26th May 1943 guessed | |
| - 2 - (3) Effect of curvature on deflection. The curvature also effects the spring rate S; but the effect is much smaller, and the discrepancies between the correction factors calculated by different investigations suggest that the effect may safely be neglected. (4) Relations between stress and deflection. It is convenient in many cases to calculate the stress from the deflection of the spring without determining the load. The stress and stiffness formulas may be combined giving. q = G/π x 8d/nD^2 x (c + 0.2)/(c - 1) = G/E x δ/l x (c + 0.2)/(c^2(c-1)) Where δ = deflection l = effective solid length of spring = nd (Issued by ...............) The department of the Controller General of research and development, Ministry of Supply, Shell Mex House, Strand, London W.C.2.) Em/KC. | ||