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).
Analysis of material failures, comparing fractures from high-stress bench tests to those occurring from repeated low-stress on the road.
| Identifier | ExFiles\Box 78\2\ scan0071 | |
| Date | 7th June 1912 guessed | |
| -5- latter seems too small to be of any account. The fractures we have obtained are not such neat failures as those that have occured on the road but I think this may be put down to the fact that on the road the stress is probably less, but repeated many thousands of times, while in the case of the bench tests the stresses were made high in order to obviate the necessity of repeating them so many times. I think the enormous number of times the stress is reversed in these links when the pin seizes on the road is the most important factor in these failures. The links are never actually still on the road and although the stress may be comparatively low I think it is quite a possibility for the metal to get Tired and in consequence give the very | ||