Recent content by FEAnalyst

For now, I've only tried using the moment of inertia calculate for a single stiffener with respect to its centroid. The formulas only require a single moment of inertia for each side (a and b or x and y). But I guess it should include some section of a plate. Here's what I've found on this...

Hi, I'm looking for a way to find the maximum deflection of a simply-supported stiffened panel analytically (to validate the FEM result). I've found some literature on this topic and I have 3 different formulas from various sources. The problem is that neither of them gives me the expected...

Thermal simulations are quite common but thermal-electrical coupling is more tricky. FreeCAD FEM uses several solvers. Mainly CalculiX but it only supports purely thermal analyses. Elmer is also supported there and allows for electromagnetic and multiphysics simulations. But if you don’t want to...

@Lnewqban I updated my diagrams to include what you said plus the symmetry condition that I forgot about (although I'm still considering using this for the workshop crane problem where there would be no symmetry). What do you think about those 2 modified approaches? The problem with the updated...

Thank you for the reply. Do you mean something like this (assuming that I will only consider half of the frame, also because it's interesting by itself - could represent a workshop crane) and solving only the red and blue beam ? I'm also thinking about treating just the brace as rigid: But...

Hi, I'd like to find the easiest way to solve the following braced portal frame statically (at least for deflection and maybe stress if possible, no need to account for buckling here - reason explained below): Of course, I could utilize symmetry: But the problem is still that it's a...

I've already replied to the OP's questions about fe-sage usage on the eng-tips forum so let's see if there are any follow-up questions here or there.

Try with a single hex element first (like the examples in the Abaqus verification guide). You will find some tips (like gradually simplifying the model, checking incrementation and amplitude settings, making sure the results are properly read and so on) here...

As I've mentioned in the first reply, the best way is to build up the complexity gradually but if the model is already complete then you can do it the opposite way - simplify or remove features one by one and check the results. Thanks to this approach you have much bigger chances of finding the...

I guess that you mean increment size. But is it set for both initial and maximum increment size or are you using direct (fixed) incrementation (not recommended) ? Because you should make sure that the incrementation actually follows the amplitude resolution and that Abaqus is not using larger...

So that cyclic load is modeled as displacement boundary condition with amplitude ? Is incrementation and output frequency adjusted to the resolution of the amplitude ? Abaqus won't do it automatically, it could even solve the analysis in one increment if convergence allows, ignoring the...

I'm a bit late but it can still be of interest. First of all, user-defined material behavior (UMAT, USDFLD or other) should always be tested using a single-element model like in Abaqus Verification Guide. I guess that's what you mean by RVE but actual RVEs are much more complex with periodic BCs...

Thank you very much. Using this approach, I get: $$\delta=\frac{5qL^{4}}{384EI}=8.9705 \ mm$$ $$\delta - \delta_{s}=\delta_{R}$$ $$8.9705- \frac{R}{k}=\frac{RL^{3}}{48EI}$$ $$8.9705- \frac{R}{100}=\frac{R \cdot 500^{3}}{48 \cdot 210000 \cdot 1728}$$ $$R=522.26 \ N$$...

Well, I guess that I could use one of the standard methods to calculate the deflection of this statically indeterminate beam from scratch but I don’t know how to treat the spring. Also, the aforementioned simple approach based on the known formula for the deflection of a beam without a spring...

Hi, I'd like to calculate the maximum deflection of a simply supported beam with spring support in the middle and UDL (uniformly distributed load) acting on the whole beam: Here's my derivation, starting from the known formula for maximum deflection of a simply supported beam with UDL and no...