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Great Blas! Thanks again for your advices! Kind regards, Julio

Dear Blas! Thanks a lot for your reply, you've given me really good tips to hex mesh this kind of geometry. The symmetry tip is also very good, thanks! I have applied some times but in some cases I cannot apply symmetry since the loads are not symmetric (when applying seismic loads to only one...

Hi HTURKAK, Thanks for your reply! The tank is simple supported to the ground at its four support legs. There is no other mechanism to hold the tank. Inner dimensions of this tank are: 5 meters length; 2 meters heigth, 1 meter width; internal and external radious equal to 0,25 m. The distance...

Dear Blas, You are right, I do not know why I did not do it before. Here you can find 2 donwload links: https://we.tl/t-7TWoAuOKpW ---- The same model (but all the geometry as one single body) with a tet mesh and results. https://we.tl/t-l2B3mDkOn2 ---- The same model with a hex mesh and...

HI Blas! Thanks again for your reply and for your willing to help. There is the file. I had to make it again because I was only allowed to upload up to 20 MB files, so this file contains the geometry, material, property, loads and constraints, but not the mesh (even thought it is ready to be...

Hello everybody! I did not write too much in the Civil Engineering forum since I am not a Civil Engineer, however, I am needing some help on the analysis of concrete (actually, it is polymer concrete, but let's imagine is conventional concrete to be able to use the standard) tanks. I was doing...

Thanks for your reply rb1957! The material is polymer concrete, let's say it is a brittle material, so no able to discard red areas due to plasticiy. The tank I posted here is just an example, there are multiple designs are yes, they are big but maybe no so much. Normally, I meshed them by...

Hi Blas! Thanks for your reply! Definitely, you are right about trying to avoid using RBE2 and RBE3 unless extremely needed (BTW, could you tell me a case when this is totally needed?). I tried to solve this problem by using RBE's, Surface-to-Surface Glue connections, one single body TET mesh...

Thanks a lot, retired13! I will check if I can get something from it! It is a great contribution! Thanks again!

Hi everybody, I am wondering if anyone can help me to know if there is any standard to design liquid-containing tanks (on-ground) using cement bricks (or any other brick would be Ok). Thanks!

I ran other simulations with the same model but with small changes in its geometry. It seems that those small red areas are due to geometry and not to CTE or meshing issues. Abrupt changes in geometry, especially in some areas with a 90 degree change produce this red areas. The next figure show...

Thanks TG_eng, For thermal analyses I have not this problem. The issue arises when I have to perform a thermal stress analysis. Anyway, I am trying to figure out hot to properly hex-mesh the whole structure. I will let you know if I find a solution. Thanks! Julio

Hi Thomas, In fact I am not looking for a very accurate simulation at this time, I just wanted to get the maximum principal stress on the floor at the moment of the impact. Thanks for your recommendation! Julio

Thank you karachun, this guide will help me a lot, for sure. The object I am thinking to hit the floor has a flat bottom surface, in fact, it is a sheet. I may suppose that the object does not rotate before and after the impact, since I am only seeking for obtain the maximum principal stresses...

Hi everybody! I'm using Femap with NX Nastran 2019.1, Basic Module, and I'm wondering if the software is capable of perform impact analyses. I'm thinking on a heavy object (maybe 500 kg) falling from about 2 meters height to hit, for example, the concrete floor. Is SOLVER 129 (Basic Non-linear...

Hello everybody! I am wondering if the function glue surface-to-surface of FEMAP provides an option to set up the Coefficient of Thermal Expansion when defining the Connection Property. I am doing some simulations where the thermal load is critical (and I have solids joining) but I am getting...

Thanks rb1957! I will try by meshing the connecting surfaces as you suggested before, since meshing a single solid would lead to a not good-quality mesh, unless refining too much locally.

Definitely, it is better if I try to explain myself with an example (the file and images)... The geometry looks like the one in the next image: I divided it into 9 pieces by using Femap's slice function, so I was able to mesh the solid easily in a better way (Jacobian less than 0.7). Next...

Amazing! Thanks a lot, karachun!

Thanks rb1957! I will try a new model by constraining only one node in all 6 DOF's as you told me! Thanks again!