Problem 7.4
Given:
The cross section of the modified boxsection
beam is shown.
A positive bending moment Mx = 80
kNm is applied.
Determine the maximum flexural stress.
Solution:
A
150mm 200
⋅
mm
⋅
100 mm
⋅
100
⋅
mm
⋅
−
20000 mm
2
⋅
=
:=
find centroid relative to the bottom edge
y
c
150 mm
⋅
200
⋅
mm
⋅
100
⋅
mm
⋅
100 mm
⋅
100
⋅
mm
⋅
125
⋅
mm
⋅
−
A
87.5 mm
⋅
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This note was uploaded on 01/11/2011 for the course MAE 3040 taught by Professor Mechanicsofsolids during the Spring '10 term at Utah State University.
 Spring '10
 MechanicsofSolids
 Stress

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