Zeinah Mohamad Elnassar I think its warning not an error...so i think it will acceptable if warning message...& about values,: In most cases this msg will occur if ur model is improperly constrained or extremely large load magnitudes r applied relative to the model size😊 . First check that the applied boundary conditions are correct...

-Regards

Hi,

Since you element is shell, in the element shell, we have the assumption of plane stress. To get the normal stress Sigmaz you should use 3D element.

Thank u Saeed Khadem Moshir

but here I am looking at sigmaX Not z

Dear Zeinah Mohamad Elnassar

The stresses are computed for each finite element as it is shown in the theoretical formulas.

You need to list the stresses values in the elements menu.

It is possible to get different stresses values at one node. In this case, you have to calculate the mean stress value at the considered node for neighboring elements

Dear Zeinah Mohamad Elnassar,

In completion of what Prof. Mohammed Lamine Moussaoui described, as you know, the finite element method takes the inputs (like force or displacements) and obtains the unknown parameters by theoretical formulations. Based on the solution, FE calculates the stress values in the integration points and then interpolates them through the nodes. At this level, it can also show you the results on the elements. But the solution is the same. It’s just a matter of “displaying the results”. So perhaps you are seeing a list of stress shares of each node from the adjacent integration points as the neighboring elements are converging in that node. We know that we only get one displacement/force vector (not stress) per node (as an answer), but if you need only one stress for each node, you need to check the “mean stress” values on the nodes. As for elements, it is called “elemental mean”.

Yes Ms. Zeinah Mohamad Elnassar

the stresses are computed per element such that only one value per stress type is obtained. And the displacements are obtained from the global system of equations solving using the elements assembly. The nodal stresses values are then deducted.