They are not important for the given question. You can continue excluding and ignoring them. Good call.Woopydalan said:... but I also am not considering the internal forces F_DE and F_FE. I'm not sure how to go about finding those, if they are important for solving.
The purpose of determining internal force with section cut on a structure is to analyze the distribution of forces within a structure. This allows engineers to understand how the structure will behave under various loads and to ensure that it is able to withstand these loads without failure.
Internal force is calculated by applying the principles of equilibrium and using the equations of statics. The section cut is used to isolate a portion of the structure and analyze the forces acting on it. By summing the forces and moments acting on the section, the internal forces can be determined.
The accuracy of determining internal force with section cut can be affected by several factors, such as the accuracy of the structural model, the assumptions made in the analysis, and the type and magnitude of the loads applied. It is important to carefully consider these factors and validate the results to ensure the accuracy of the analysis.
Yes, there are limitations to determining internal force with section cut. This method is most accurate for statically determinate structures, meaning those that can be fully analyzed using the principles of equilibrium. In addition, it may not accurately capture the effects of complex structural behavior, such as non-linear or dynamic behavior.
The results of determining internal force with section cut can be used to ensure that the structure can safely withstand the expected loads and to optimize the design. Engineers can use the internal force values to select appropriate materials and dimensions for the structure, and to identify areas of high stress that may require additional reinforcement.