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ASTM Selected Technical Papers
Manual on Low Cycle Fatigue Testing
By
RM Wetzel
RM Wetzel
1
Ford Motor Co.
Search for other works by this author on:
LF Coffin, Jr Jr
LF Coffin, Jr Jr
2
Metallurgy and Ceramics Laboratory, General Electric Co.
,
Schenectady, N.Y.
;
Chairman
, Subcommittee VIII, ASTM Committee E-9
Search for other works by this author on:
ISBN-10:
0-8031-0035-3
ISBN:
978-0-8031-0035-0
No. of Pages:
209
Publisher:
ASTM International
Publication date:
1969

The purpose of this paper is to outline a method for evaluating the low cycle fatigue resistance of a metal from the mechanics of materials viewpoint. This includes a discussion of the fatigue properties and the effect of repeated plastic straining on the mechanical properties of metals. The cyclic stress-strain curve is defined as the locus of tips of several stable hysteresis loops obtained at different cyclic strain ranges. An expression is presented for mathematically representing the locus of their tips, and a number of experimental methods are discussed for determining the stable cyclic stress-strain properties.

Experimental techniques for low cycle fatigue testing and methods of interpreting results are presented. The equations which relate the elastic and plastic components of cyclic strain amplitude to fatigue life are developed. A means of approximating the strain-life curve using these relations is presented.

1.
Dieter
,
G. E.
Mechanical Metallurgy
,
McGraw-Hill
,
New York
,
1961
, p. 287.
2.
Polakowski
,
N. H.
and
Palchoudhuri
,
A.
, “
Softening of Certain Cold-Worked Metals Under the Action of Fatigue Loads
,”
Proceedings, American Society for Testing and Materials, ASTEA
, Vol.
54
,
1954
, pp. 701–716.
3.
Benham
,
P. P.
, “
Fatigue of Metals Caused by a Relatively Few Cycles of High Load or Strain Amplitude
,”
Metallurgical Review
, Vol.
3
, No.
11
,
1958
, pp. 203–234.
4.
Lazan
,
B. J.
and
Wu
,
T.
, “
Damping, Fatigue, and Dynamic Stress-Strain Properties of Mild Steel
,”
Proceedings, American Society for Testing and Materials, ASTEA
, Vol.
51
,
1951
, p. 649.
5.
Coffin
,
L. F.
, Jr.
, “
A Study of the Effects of Cyclic Thermal Stresses on a Ductile Metal
,”
Transactions of the American Society of Mechanical Engineers
 0097-6822, Vol.
76
,
08
1954
, pp. 931–950.
6.
Morrow
,
JoDean
, “
Cyclic Plastic Strain Energy and Fatigue of Metals
,”
Internal Friction, Damping, and Cyclic Plasticity
, ASTM STP 378,
American Society for Testing and Materials
,
1965
, pp. 4–83.
7.
Landgraf
,
R. W.
,
Morrow
,
JoDean
and
Endo
,
T.
, “
Determination of the Cylic Stress-Strain Curve
,”
Journal of Materials, JMLSA
, Vol.
4
, No.
1
,
03
1969
, pp. 176–188.
8.
Feltner
,
C. E.
and
Mitchell
,
M. R.
, “
Basic Research on the Cyclic Deformation and Fracture Behavior of Materials
,”
Manual on Low Cycle Fatigue Testing
, ASTM STP 465,
American Society for Testing and Materials
,
1969
, pp. 27–66.
9.
Feltner
,
C. E.
and
Landgraf
,
R. W.
, “
Selecting Materials to Resist Low Cycle Fatigue
,” ASME Publication No. 69-DE-59,
American Society of Mechanical Engineers
,
1969
.
10.
Basquin
,
O. H.
, “
The Exponential Law of Endurance Tests
,”
Proceedings, American Society for Testing and Materials, ASTEA
, Vol.
10
,
1910
, pp. 625–630.
11.
Endo
,
T.
and
Morrow
,
JoDean
, “
Cyclic Stress-Strain and Fatigue Behavior of Representative Aircraft Metals
,”
Journal of Materials, JMLSA
, Vol.
4
, No.
1
,
03
1969
, pp. 159–175.
12.
Building a System for Testing Small Metal Specimens
,”
Closed Loop
,
MTS System Corp.
,
Minneapolis, Minn.
, Vol.
1
, No. 8,
1968
, pp. 3–6.
13.
Landgraf
R. W.
, “
Cyclic Deformation and Fatigue Behavior of Hardened Steels
,” TAM Report No. 320,
Department of Theoretical and Applied Mechanics, University of Illinois
, Urbana, Ill., November, 1968.
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