Rotating bending fatigue tests on En 40B steel gave a fatigue limit for surface failure of 30·5 tonf/in2. With nitrided test-pieces sub-surface failures were produced and, with no allowance being made for residual stresses, a fatigue limit of 34·5 tonf/in2 was obtained for sub-surface failure. In the absence of residual stresses this fatigue limit would probably have been higher.
Get full access to this article
View all access options for this article.
References
1.
BeechingR.NichollsW.‘Theoretical discussion of pitting failures in gears’, Proc. Instn mech. Engrs1948158, 317.
2.
ForrestP. G.Fatigue of metals1962, 193 (Pergamon Press, Oxford).
3.
GroverH. J.GordonS. A.JacksonL. R.Fatigue of metals and structures1956, 91 (Thames and Hudson, London).
FrostN. E.‘A note on the behaviour of fatigue cracks’, J. Mech. Phys. Solids19619, (No. 3), 147.
6.
SinesG.WaismanJ. L.Metal fatigue1959, Ch. 7, 145 (McGraw-Hill, New York).
7.
JohnsonJ. B.ObergT. T.‘Effect of notches on nitrided steel’, Metals and Alloys19345, 129.
8.
BardgettW. E.‘Factors affecting the influence of nitriding on fatigue strength’, Metal Treatment194310, (No. 34), 87.
9.
PetersonR. E.LessellsJ. M.‘Effects of surface-strengthening on shafts having a fillet or transverse hole’, Proc. S.E.S.A.19442, (No. 1), 191.
10.
CazaudR.Fatigue of metals1953, Ch. 7, 157 (Chapman and Hall, London).
11.
ColemanE. P.‘The flow of fluids in a venturi tube’, Trans. Am. Soc. mech. Engrs190728, 483.
12.
PurdyH. D.‘Model experiments for the design of a 60 inch water tunnel. Part I—Description of apparatus and test procedure’, St Anthony Falls Hydraulic Laboratory, 1948 (September), University of Minnesota Project Report No. 10.
13.
FosterD. V.‘The performance of the 108 compressor fitted with low stagger free vortex blading’, unpublished.
14.
LindleyD.‘Venturi-meters and boundary layer effects’, Ph.D. Thesis, University of Wales, 1966 (September).
15.
SpencerE. A.ThibessardG.‘A comparative study of four classical venturi-meters’, Paper C-3 from the Symposium on Flow Measurement in Closed Circuits, held at M.E.L. in September 1960.
16.
‘Methods for the measurement of fluid flow in pipes. Part I. Orifice plates, nozzles and venturi tubes’, BSS. 1042, Part I, 1964.
17.
SpencerE. A.HaywardA. J.TudhopeJ. S.‘The calibration of a 4-inch classical venturi-meter’, M.E.R.L. Fluid Report No. 24, 1954 (December).
18.
LindleyD.‘Venturi-meters and boundary layer effects’, Ph.D. Thesis, University of Wales, 1966.
‘Measurement of fluid flow by means of venturi tubes’, Draft ISO Rec.1157, 1967 (International Organization for Standardization, Geneva).
30.
HuttonS. P.‘The prediction of venturi-meter coefficients and their variation with roughness and age’, Proc. Instn civ. Engrs, Part 3, 19543 (1), 216; and (3), 922.
31.
HallG. W.‘Application of boundary layer theory to explain some nozzle and venturi flow peculiarities’, Proc. Instn mech. Engrs1959173, (No. 36), 837.
