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).
Photographic analysis of stress concentration on a plate with a hole under increasing tensile loads.
| Identifier | ExFiles\Box 142\2\ scan0475 | |
| Date | 16th December 1939 guessed | |
| 11 .0010 9 8 7 6 .0005 4 W.P. a.{Mr Adams} b. c. d.{John DeLooze - Company Secretary} e.{Mr Elliott - Chief Engineer} a.{Mr Adams} Calibration strip in scale which is marked in inches per inch strain. b. Plate with hole; 5000 lb.load. c. Plate with hole; 9000 lb.load. d.{John DeLooze - Company Secretary} Plate with hole; 14000 lb.load. e.{Mr Elliott - Chief Engineer} Plate with hole; 17000 lb.load. Concentration Factor = load at e / load at b = 2.4 Figure 3. - Plate With Hole, Loaded in Tension | ||