Column Problem Help: Calculating Length of Conical Steel Column Under Load

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The discussion focuses on calculating the deformed length of a conical steel column under a normal axial load of 1450 kN. The column has an original length of 1000 mm, a head diameter of 90 mm, and a ground diameter of 190 mm. The correct approach involves integrating the strain along the length of the column, using the formula (F/E) ln[(π*d^2)/4] to determine the change in length. The integration must account for the varying diameter along the column's length.

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A straight conical column made of steal (original length 1000mm, head diameter 90 mm, ground diameter 190 mm) is loaded by a normal force F = 1450 kN. What is the length under load ?

for this ,the diameter is changing along the column,should i assume is as hollow and use the hollow formula for the area or any other ways??
 
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i get (force/E) (1/A(x)) dx = d(strain)

then i integrate to get (F/E) ln[(pi*d^2)/4] = deformed length - original lengh

am i correct??
 
When you say normal force, what do you mean? Axial or normal to the member? If it is axial, then yes, you have to integrate.
 

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