Finding Axial Forces in a Truss to Solving for BC, BD, and BE

AI Thread Summary
To determine the axial forces in truss members BC, BD, and BE, start by calculating the support reactions and identifying any zero force members. It is suggested to use the method of sections, cutting through members CE and BD to analyze the forces. The x-component of the reaction at joint B is equivalent to the force in member BD. Summing moments around the appropriate points in the free body diagram will help solve for the unknown forces in members BE and BD. Properly applying these methods will lead to the correct determination of the axial forces in the truss.
Isimanica
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Homework Statement


1154516.jpg

The truss shown is part of an
airplane’s internal structure.
Determine the axial forces in
members BC, BD, and BE.

Homework Equations





The Attempt at a Solution


Ok I am trying to figure out how or where to divide this truss up and forces to draw when I do. I don't know where to cut to get started.
 
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First determine the support reactions. Then identify zero force members. Then use method of joints or sections to solve for the member forces.
 
So I should divide right down the middle of CE and BD correct?
And that the the two forces reacting at B the x force is also the force of BD, that they are one and the same.
 
Isimanica said:
So I should divide right down the middle of CE and BD correct?
And that the the two forces reacting at B the x force is also the force of BD, that they are one and the same.
You should first determine the force reactions and zero force members before cutting sections. Then, if you prefer the method of sections over the method of joints, you can do the cut as you described and sum moments about appropriate points in the appropriate free body diagram, to solve for the unknown forces in members BE and BD.
 
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