The modified Findley line is proposed by using ultimate strength and endurance limit as parameters to obtain a good initial approximation of an acceptable design. Comparing with experimental data, the modified Findley line could be a strong candidate for fatigue design criterion for parts made of a nonferrous materials, and be conservative for ferrous material parts.

Issue Section:
Technical Briefs
Topics:
Fatigue design, Stress, Approximation, Design, Endurance limit, Tensile strength
1.
Brown
M. N.
, and
Miller
K. J.
,
1973
, “
A Theory for Fatigue Failure under Multiaxial Stress-Strain Condition
,”
Proceedings of Institution of Mechanical Engineers
, Vol.
187
, pp.
745
–
755
.
2.
Findley, W. N., Coleman, J. J., and Hanley, B. C., 1956, “Theory for Combined Bending and Torsion Fatigue with Data for SAE 4340 Steel,” Proceedings of International Conference on Fatigue on Metals, London, pp. 150–157.
3.
Findley, W. N., 1959, “A Theory for the Effect of Mean Stress on Fatigue of Metals under Combined Torsion and Axial Load or Bending,” ASME Journal of Engineering for Industry, pp. 301–306.
4.
Flavenot, J., and Skilli, N., 1984, “A Critical Depth Criterion for the Evaluation of Long-Life Fatigue Strength under Multiaxial Loading Stress Gradient,” Proceedings of the 5th European Conference on Fatigue, ECF, Lisbon, Portugal, pp. 335–343.
5.
Forrest, P. G., 1962, Fatigue of Metals, Pergamon Press Inc., London.
6.
Grover, H. J., Bishop, S. M., and Jackson, L. R., 1951, “Axial Load Fatigue Tests of Unnotched Sheet Specimens of 24S-T3 and 75S-T6 Aluminum Alloys and SAE 4130 Steel,” National Advisory Committee for Aeronautics Technical Notes, 2324.
7.
Little
R. E.
,
1969
, “
A Note on the Shear Stress Criterion for Fatigue Failure under Combined Stress
,”
Aeronaut. Q.
, Vol.
20
, p.
57
57
.
8.
Schwartz, R. T., 1948, “Correlation of Data on the Effect of Range of Stress on the Fatigue Strength of Metals for Tensile Mean Stress,” Master Thesis, Ohio State University.
9.
Stanfield
G.
,
1935
,
Written discussion of the “The Strength of Metals under Combined Alternating Stresses,” by Gough, H. J.
,
Proceedings of The Institution of Mechanical Engineers
, Vol.
131
, p
93
93
.
10.
Stulen
F. B.
, and
Cummings
H. N.
,
1954
, “
A Failure Criterion for Multi-axial Fatigue Stresses
,”
Proceedings of ASTM
, Vol.
54
, pp.
822
–
835
.
11.
Wang, Shyh-Jen, 1995, “Fatigue of Ductile Materials Subjected to Non-Zero Mean Stresses,” Ph. D. Dissertation, Clemson University, SC.
This content is only available via PDF.
Copyright © 1997
 by The American Society of Mechanical Engineers
You do not currently have access to this content.