Equivalent Force Systems: Statics Review

In summary, the approach to solving this problem involves finding reactions at the supports, using the Joint or Section Cut Method, and applying the Euler Buckling equation to determine if member b0b1 will buckle. The force applied on the ternary link will affect joints a1 and b1, and there will be reactions in both the x and y directions at the fixed joint a0. It is important to consider all forces and moments in analyzing the stability of a structure. Seeking help from a structural engineer or professor may also be beneficial.
  • #1
JoshL
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Screenshot2012-08-04at124555PM.png


I know how to approach this problem. First, I will need to find the reactions at the supports. Then apply Joint or Section Cut Method to find the forces acting between the members. Then take the force acting on member b0b1 and plug in Euler Buckling equation, while choosing the correct effective length for the situation and determining the critical force. All the variables are given. Basically, I need to know if member b0b1 will buckle according to Euler buckling method.

The problem I am having is the force applied on the ternary link. How does that force affect joints a1 and b1. Do I have to convert that force into moments about these two joints? Also for the fixed joint a0, will there be reaction in the x and y directions along with a moment. I think the orientation of member a0a1 and of the ternary link is what is throwing me off.

Any help or suggestions would be greatly appreciated. Thanks.
 
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  • #2

It seems like you have a good approach to solving this problem. Finding the reactions at the supports and using the Joint or Section Cut Method to determine the forces between members are important steps in analyzing a structure.

To answer your questions, the force applied on the ternary link will indeed affect joints a1 and b1. You do not necessarily have to convert the force into moments, but you will need to consider the force as a load acting on both joints. This force will cause tension or compression in the members connected to these joints, which will in turn affect the overall stability of the structure.

For the fixed joint a0, there will indeed be reactions in both the x and y directions, as well as a moment. The orientation of member a0a1 and the ternary link will also play a role in determining these reactions. It is important to consider all forces and moments acting on a joint in order to accurately analyze the stability of a structure.

I would suggest reviewing the basics of statics and mechanics of materials to better understand how forces and moments affect structures. Additionally, consulting with a structural engineer or professor may also be helpful in solving this problem.

I hope this helps. Best of luck with your analysis.
 

Related to Equivalent Force Systems: Statics Review

1. What is the concept of equivalent force systems in statics?

Equivalent force systems refer to a method used to simplify complex systems of forces into a single force or couple that has the same effect on a body as the original system. This is based on the principle of equilibrium, where the sum of all forces and moments acting on a body must be equal to zero.

2. How do you determine the equivalent force and couple for a given system?

To determine the equivalent force and couple for a given system, you must first identify all the external forces and moments acting on the body. Then, using the principles of equilibrium, you can solve for the equivalent force and couple by setting the sum of all forces and moments equal to zero. This can be done through graphical or mathematical methods.

3. What is the importance of equivalent force systems in engineering?

Equivalent force systems are important in engineering because they allow for the analysis and design of structures and machines under different loading conditions. By simplifying complex systems into a single equivalent force, engineers can accurately predict the behavior and stability of structures and ensure they can withstand various forces and moments.

4. Can equivalent force systems be used for non-rigid bodies?

Yes, equivalent force systems can be used for both rigid and non-rigid bodies. However, the analysis may be more complex for non-rigid bodies as they can undergo deformations and changes in shape when subjected to external forces.

5. Are there any limitations to using equivalent force systems?

While equivalent force systems are a useful tool in statics, they do have some limitations. They can only be used for systems in equilibrium, and they do not take into account the internal forces and stresses within a body. Additionally, the assumptions made in simplifying a complex system may not always accurately reflect the real-world behavior of a structure or machine.

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