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Robert Vier replied to j koeken's discussion Delete shell elements/points from isolines in the group karamba

"so that could end up in an iterative procedure cause the internal stresses change, and therefore the isolines change as well. further, it very much depends on which points you define to calculate the isolines through. if you want to do this anyway,…"

Dec 11, 2012

j koeken replied to j koeken's discussion Delete shell elements/points from isolines in the group karamba

"Yes, i wanted to create holes in the surface, but i want the position of the holes be dependent from the isolines. So i create holes in the surface but only on the places where the material is the less needed for the construction. Regards"

Dec 11, 2012

Robert Vier replied to j koeken's discussion Delete shell elements/points from isolines in the group karamba

"what do you mean? delete shell elements based on some isoline information?"

Dec 11, 2012

j koeken added a discussion to the group karamba

Delete shell elements/points from isolines

Hello,Does anywone know how to delete ellements of my shell from the isolines? Regards, JeroenSee More

Dec 10, 2012

3 Comments

j koeken replied to j koeken's discussion my id modelview works on the displacement, but not on the princ stress in the group karamba

"Dear Clemens, Thanks for your answer. I really can get out the peak stresses, and i`m running out of time for my school project. I have the question if i please can get the old version of Karamba but with the one error of the bug fixed so i…"

Nov 13, 2012

karamba replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"Sorry I can not dig into your definition for lack of time. Take the lines at the perimeter of your shell and feed them into a LineToBeam-component. You can either strengthen only the corner regions at the supports or all free shell edges. Doing the…"

Nov 12, 2012

karamba replied to j koeken's discussion my id modelview works on the displacement, but not on the princ stress in the group karamba

"Hello, thank you very much for your bug report. I found the error. An updated release will be published soon. Best, Clemens"

Nov 12, 2012

j koeken replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"Hello Clemens, Thanks for your reaction, but I don`t understand how i can make the short edge beams near the corners. Do you have an example or can you show it in my gh. file? See the attachement Best, Jeroen"

Nov 12, 2012

karamba replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"You should add small edge beams near the four corners of your shell. In this way you can avoid the stress singularity that results from supporting a surface structure in a point. Otherwise the resulting deflections are mesh dependent and increase…"

Nov 12, 2012

karamba replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"You can test the principal stress directions calculated by karamba by considering a plate under various, in-plane boundary loads. Best, Clemens"

Nov 12, 2012

j koeken replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"Is it possible that i can get a lest of how the program is calculating the princ. stress in the shell structure. There is only a list of a beam structure in the manual Best, Jeroen"

Nov 12, 2012

Robert Vier replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"it's easily avoided when just replacing the model-view component by a new one or alternatively playing around with the id's you feed in.. i dont really know which one didnt have the bug. a release version is not currently there."

Nov 12, 2012

j koeken replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"Hello Robert, Thanks for your reaction. Is there a version of Karamba where these bug is not in the id-handeling. Otherwise i can use that version. Best Jeroen"

Nov 12, 2012

Robert Vier replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"depending on the version of karamba there is a bug in the id-handling of the model view, this is being fixed at the moment. generally the best way is to avoid those singularities. e.g. by inserting two spring-beams on each corner of your shell that…"

Nov 12, 2012

j koeken added a discussion to the group karamba

my id modelview works on the displacement, but not on the princ stress

Hello,I only want to see the stress results in the top of my shell structure. I splitt the mesh in 2 ID`s, when i want to view only one ID it works on the displacement, but it isn`t working on the stress princ. Does anyone know what i do wrongSee the attachement Regards JeroenSee More

Nov 12, 2012

2 Comments

j koeken replied to j koeken's discussion Karamba principal stresses are not correct in the group karamba

"Hello Robert, I think i got the solution. I split the mesh in two, a mesh on the top (id c) and a mesh on the bottem (id b). I want to view the results of the mesh on the top (id c) in the modelview and in the shellview, is this…"

Nov 12, 2012