Determine the state of stress at point A on the cross of the pipe at section a-a. Show the results in a ntial element at the point.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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F8-7. Determine the state of stress at point A on the cross
section of the pipe at section a-a. Show the results in a
differential element at the point.
a
300 mm
'A
300 mm
a
6 kN
50 mm
A
40 mm
Section a - a
F8-7
Transcribed Image Text:F8-7. Determine the state of stress at point A on the cross section of the pipe at section a-a. Show the results in a differential element at the point. a 300 mm 'A 300 mm a 6 kN 50 mm A 40 mm Section a - a F8-7
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This is a follow up to my question and the answer you submitted.

The equation you used for J is wrong, not sure how you got J=π32×Do4-Di4,

the equation should be J=π/2×ro4-ri4 which is J=pi/2(50^4-40^4) = 5.8e+6 mm^4

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Follow-up Question

The problem I am solving shows a point B on the OD of the pipe that lies on the z-axis.  When using the equation tau =(Mr)/J, I get 15.5 MPa, not 124 MPa

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