Stress calculations, load characteristics, and manufacturing considerations for leaf springs.
| Identifier | ExFiles\Box 43\2\ Scan199 | |
| Date | 28th September 1937 guessed | |
| - 4 - Stress = Et/2Rx = Et/2Ro {C. C. Rose - Export Manager} Hence the load per plate can be found as before. Finally, the numbers of each thickness of plate are selected by trial as given below. Note (1). It is found that the normal load is actually about 5% and the stiffness about 15%, higher than the calculated load and stiffness. We think this may be due to the fact that the metal does not deflect in bending exactly in accordance with the elastic diagram, thus:- But rather thus:- I have seen some published articles to this effect. Note (2). Also it is necessary to bend the plates to a smaller radius than the desired initial radius, because they "let go" a little in the first bouncing under the hydraulic ram. We are hoping to reduce this effect by reducing the hand-hammering of plates after quenching. The first radius for a desired permanent unstressed radius is found by trial, and is given on the spring sheets. A typical case is given for A.9809, 1150 lbs. front spring, 43.5" centres :- | ||
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).