Abaqus Modelling - Troubleshooting Tutorial for Beginners

In summary, the tutorial says that the parts of the assembly that are too complex to be meshed with those mesh settings are the zones between the two solder-1 and the cap, and between the solder-1 and the body. In order to mesh the parts, the user must merge the edges of the two disconnected zones. However, the user ran into trouble when trying to do so. My model is made from randomly placed particles, and I need to take into account the isotropic case when simulating the cracks propagated throught the material.
  • #1
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 !
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  • #2
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.
  • #3
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 ?
  • #4
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.
  • #5
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 throught particle boundary, but as I "scented" already, that fact could be studied only experimentaly.

Related to Abaqus Modelling - Troubleshooting Tutorial for Beginners

1. What is Abaqus modelling and why is it important?

Abaqus modelling is a finite element analysis software used for simulating and analyzing the behavior of structures and materials under various loading conditions. It is important because it allows researchers and engineers to understand how a structure or material will react under different scenarios, without the need for physical testing.

2. What are some common issues that beginners face when using Abaqus?

Some common issues that beginners face when using Abaqus include difficulty with creating and meshing models, errors in the input file, and convergence problems during analysis. These issues can often be resolved by carefully reviewing the input file and making sure all parameters are correctly defined.

3. How can I troubleshoot errors in Abaqus?

To troubleshoot errors in Abaqus, it is important to carefully review the error message and identify the source of the problem. This can often be done by checking the input file for any errors or incorrect parameters. Additionally, using the Abaqus documentation and online forums can provide helpful tips and solutions to common errors.

4. Is it necessary to have a background in programming to use Abaqus?

While having a background in programming can be helpful when using Abaqus, it is not necessary. Abaqus has a user-friendly interface and provides a variety of tools and options for creating and analyzing models. However, having some knowledge of programming can be beneficial in understanding and customizing the software for specific needs.

5. Can Abaqus be used for all types of simulations?

Abaqus is a versatile software and can be used for a wide range of simulations, including structural, thermal, and fluid analysis. However, it is important to ensure that the material models and boundary conditions used in the simulation are appropriate for the specific type of analysis being performed.

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