I am not interested in stresses in and around bolts. I am only looking for a good method to model contactig surfaces in modal analysis. Some softwares have linear contact (glued) which you can run modal analysis. Actually, I believe that this contact is nothing but a lot of RBE2s generated...
Hi,
I used RBE2s to connect two bolted structures together and run frequency response analysis (shell-solid). Ofcourse, the regions where there is no RBE2, structures may penetrate each other in modal analysis as well as in frequency response. My collegue suggest that I should use glued contact...
Hi all,
We simplify our FE model (shell and beam elements) for welded constructions to analyze the entire system. That means we model welded parts as uni-block (i.e. continous parts). After this global analysis, we will analyze the welded parts by incorporating the weld as well in detail. But...
Thanks tankman,
I understand your point for weld radius. However, my question is general about shell elements and their behaviour at sharp corners. Assume that I have box beam modeled with shell elements. I am interested in global stress values instead of local ones. Is it enough just to use...
Dear All,
Many structures are made of plates that are welded together. How are we going to model these structures in FE. Assume that I am using shell elements. And I have 90degree corner (crosssection is L shape). I used to use same nodes at the corners of the shell elements (coincident)...
Dear All,
I wonder whether pipeline analysis programs such as Ceasar, AutoPipe etc are enough to satisfy the requirements stated by standards like BS7159, ANSI31.3,ANSI31.3 etc. In other words, would anyone need detailed finite element analysis or analytical calculations to meet the criteria...
I will use Dytran. The fluid side (blast gas waves) of the problem is another story. I am more interested in basics like true material behaviour, dynamics involved in the deformation etc. Since we are quite new to subject I want to start with very simple problems like point shock loading on a...
We will perform FEA analysis of a plate under blast load. In order to verify our analysis, we need theoretical or experimental solution of a plate under shock loading. This load can be distributed load or a point load. Our aim is to compare our FEA results by changing material data (yield stress...
Dear Sirs,
We are going to develope valves actuated by earthquake. Sensing part may send signal to valve electrically or mechanically.
Do you know any helpful articles, books, web sites about this subject. We are open to collobration with other companies in this project.
A.Kuntay
if you would like to get flange stresses and interested in bolted area, you have to either use tying to give same displacement b.c. to both flanges at bolt points or model even bolt. If you are not interested in flanges but in far area than just use tying or even you can combine those nodes...
I am using standard 3D shell elements. I will also use beams but currently i am concentrated in plate joints. This drilling dof problem as bradth mentioned appears in Nastran practical guide and also in one of Aerospace company's ýnternal research group documentation. Do you think solid elements...
I am trying to model a structure made from plates and supporting bars. Think about 2 rectangular plates connected to each other by supporting plates and bars that are perpendicular to 2 plates. As far as I know, if I connect plates perpendicular directly on the same node, I end up with very...
