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).
Explanatory notes on the distribution of stresses for the 'Stabifix' shock absorber system.
| Identifier | ExFiles\Box 15\6\ Scan158 | |
| Date | 1st January 1931 guessed | |
| S T A B I F I X . Explanatory notes on the distribution of stresses. When a vehicle is proceeding in a straight line Stabifix functions solely as a shock absorber. Its effect in this capacity is easily regulated by the nut on the central bolt of the apparatus, according to the special instructions given in the general description. The forces that come into play in that case and which re-act on the Stabifix and its housing on to the chassis are so small as to be negligible. It is otherwise when a rear wheel receives a shock or when the vehicle enters a turn. We shall then have a lateral surcharge during the progress of the vehicle, it is the effect of a falling mass -- ΔA = F . Δx that makes itself felt then, the smaller the path Δx the smaller shall be in that case the force F.{Mr Friese} If one designates the mean value of the force that causes the compression of the spring - x -, one can admit approximately that the maximum value of that force shall be - F max = 2 F m One can allow that height with a very small error because the springs certainly absorb the shocks. If that should not be the case the force Fmax would be three or four times greater than the force Fm. As the stress acting on the Stabifix attains its maximum value Fr = F when x = 0, we will examine the distribution of stresses in the Stabifix in the case represented by Fig. No. 1, that is to say when the apparatus is loaded unilaterally by a force F.{Mr Friese} We shall have then at the point Or of the upper bar the stress - F2 = F ( 1 + b/a ) | ||