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Strenght material problem

Kaszluga

Aerospace
Joined
Jul 2, 2025
Messages
4
The degree of indeterminacy of this system is one — it is uniquely indeterminate (or indeterminate of the first degree). But why?
 

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Hello. Aren't both foundations of this framework sometimes solidified? Then there is a statically indeterminate system. You can learn more in the mechanics manual
 
Hello. Aren't both foundations of this framework sometimes solidified? Then there is a statically indeterminate system. You can learn more in the mechanics manual
Yes, the ends of the rods are fixed. In my opinion, this is a three-time statically indeterminate system. According to my lecturer - one-time statically indeterminate
 
The degree of indeterminacy of this system is one — it is uniquely indeterminate (or indeterminate of the first degree). But why?
Assuming both supports fixed, and the frame is 2D , there are 3 support reactions at each support . If the system is not symmetric , total unknowns will be 6 and you have 3 equilibrium equations , so the system will be indeterminate of 3
degree.
If the members identical and symmetry is satisfied , the reactions will be symmetric and degree of indeterminacy would be 1.

You may look structural analysis books.
 

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