Application of Probability to Mechanical Design
Brittle
/’c
Material
Temperature, °F
Figure 2.22 Typical cha~py or Izod test of steel.
87
O’y¥ m
~’XXm
Figure 2.23
1;Xy m
Plane
Stress
~YYm
Mean plane stress.
(YXXm
When the shaft is not rotating (co = O)
l +M.c
O" r ~ --~
(2.87)
1 -tMm¢
(2.88)
O" m ~
!
B. Fatigue Properties of Materials
Fatigue life of a material is not a property like modulus, which, under normal conditions, is a material constant. The endurance limit of a material