Abaqus Modelling - Troubleshooting Tutorial for Beginners

[Moxica]

Hello ! I'm a beginner in Abaqus and for that I've tried to follow this tutorial http://fliiby.com/file/831535/i3rkmyhurs.html .

I was all ok until I tried to make the mesh (chapter 3.7.2 in tutorial). It said that they are parts of the assemby that are too complex to be meshed with those mesh settings.

The problematic zone is this:

http://dl.fisier.ro/files/fg5km1bnghh254k/1.JPG.html from a far away point,
http://dl.fisier.ro/files/5k75edol71l135e/2.JPG.html from a close point,
http://dl.fisier.ro/files/5e44hm5or1mkdhh/3.JPG.html from a more close point,
http://dl.fisier.ro/files/14je3hpgb1inldj/4.JPG.html from which it can be seen morea easily the problematic zone .

From my observation, even following the instruction given in tutorial, between the solder-1 and the cap, the is a empty space (they are not merged as it must normaly be).

I've tried to start over the entire execise, and, that empty spare appeared again.

Could anybody give me some advices ?

I use Abaqus 6.9 . Here http://dl.fisier.ro/files/3ncmfplel2kcbha/Saved_model.zip.html is my model .

Thanks, and have a nice day !

 

[nvn]

Moxica: Perhaps look for a Stitch (or maybe Merge) button somewhere. When you find it, select the two disconnected edges, and stitch them together. See if this helps.

 

[Moxica]

I did not made it yet, and for now I began to study more carrefully Abaqus documentations.

But, I have another questions.

My goal is study of cracks in ceramic composite bodies . The addition material is not made from laminae, but from particles; in other words, my ceramic composite is made by mixed powders and not from superimposed laminae. From what I know, in Abaqus can be defined layered composites, but when we want to use composite made from particles, what is the "phylosophy" ?
Can be defined even composite made from particles, or these are considered just simple homogenous and isotropic (continuous) materials ?

 

[nvn]

To my knowledge, completely random particles or completely random fibers can be modeled only as isotropic material. If, instead, the short fiber orientations are slightly biased, one could use orthotropic material properties. I think your particles are close to a spherical shape, not short fibers; therefore, it seems their orientation will be almost completely random.

By the way, if you add short fibers into your mixture, I think it will make it much stronger, because ceramic material without fibers tends to be brittle.

 

[Moxica]

You're right ! My material will be made from random particles, which have a spherical shape (most of it).

So, for my simulation I must take into acount the isotropic case.

The main reason I ask this, was the posibility to simulate the cracks propagated through particle boundary, but as I "scented" already, that fact could be studied only experimentaly.