- #1
lizzyb
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Question
Given that the tube is given a shear force V = 8 kip, what is the shear flow at points A and B?
http://img268.imageshack.us/img268/144/scannedimage031.jpg
Work Completed Thus Far
I determined I:
http://img187.imageshack.us/img187/9821/scannedimage033.jpg
Q for a circle in general (second moment of inertia of an area for a circle):
http://img43.imageshack.us/img43/2042/scannedimage034.jpg
Q for this particular problem:
http://img30.imageshack.us/img30/5831/scannedimage035.jpg
Q for point B:
http://img257.imageshack.us/img257/6681/scannedimage036.jpg
q for point B:
http://img21.imageshack.us/img21/5307/scannedimage037.jpg
Yet the solution is twice what is in the back of the book.
The Big Question
It seems that for some problems we take into account that the shear force in a specific part of the object (pipe, or wooden structure) as being, say half or a third of the entire V - like in this question, take V = P/2 where P is the original, given V (P = 8 kip). But other times I've arrived at the correct answer by using the original, unmodified V.
What gives?
Given that the tube is given a shear force V = 8 kip, what is the shear flow at points A and B?
http://img268.imageshack.us/img268/144/scannedimage031.jpg
Work Completed Thus Far
I determined I:
http://img187.imageshack.us/img187/9821/scannedimage033.jpg
Q for a circle in general (second moment of inertia of an area for a circle):
http://img43.imageshack.us/img43/2042/scannedimage034.jpg
Q for this particular problem:
http://img30.imageshack.us/img30/5831/scannedimage035.jpg
Q for point B:
http://img257.imageshack.us/img257/6681/scannedimage036.jpg
q for point B:
http://img21.imageshack.us/img21/5307/scannedimage037.jpg
Yet the solution is twice what is in the back of the book.
The Big Question
It seems that for some problems we take into account that the shear force in a specific part of the object (pipe, or wooden structure) as being, say half or a third of the entire V - like in this question, take V = P/2 where P is the original, given V (P = 8 kip). But other times I've arrived at the correct answer by using the original, unmodified V.
What gives?
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