In Fig. P9.11 is shown a cast iron frame with a U-shaped cross section. The ultimate tensile strength of the case iron is o, = 320 MPa.

Elements Of Electromagnetics
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9.11. In Fig. P9.11 is shown a cast iron frame with a U-shaped cross section. The
ultimate tensile strength of the case iron iso = 320 MPa.
70 mm
300 mm-
180 mm
-240 mm-
C
60 min
30 mm
**
30 mm
Figure P9.11
(a)
Determine the maximum value of P based on a factor of safety SF =
4.00 which is based on the ultimate strength.
(b)
Neglecting the effect of stress concentrations at the fillet at the junc-
tion of the web and flange, determine the maximum radial stress when
this load is applied.
(e) Is the maximum radial stress less than the maximum circumferen-
tial stress?
Transcribed Image Text:9.11. In Fig. P9.11 is shown a cast iron frame with a U-shaped cross section. The ultimate tensile strength of the case iron iso = 320 MPa. 70 mm 300 mm- 180 mm -240 mm- C 60 min 30 mm ** 30 mm Figure P9.11 (a) Determine the maximum value of P based on a factor of safety SF = 4.00 which is based on the ultimate strength. (b) Neglecting the effect of stress concentrations at the fillet at the junc- tion of the web and flange, determine the maximum radial stress when this load is applied. (e) Is the maximum radial stress less than the maximum circumferen- tial stress?
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