88
Chapter 2
T, XYa
(~XXa
I
Figure 2.24
O" YYa
I
Stress I
Amplitude plane stress.
O" XXa
1
3
Rotation position
irrt
Rotating beam stress
1
tension 3
Figure 2.25 A reversal stress from a constant bending moment in a rotating beam.
is influenced by the type of test used and numerous other variables, of which
many have already been mentioned. Therefore for any particular material it
is necessary to examine fatigue data with respect to the end use conditions.
Nevertheless, as a guide, a few properties are presented here to assist in
the selection of materials for particular applications. More detailed property
information on specific materials should be obtained from the fabricator or
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