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FEM simulation on damage of brittle materials with Abaqus on mesoscale

Submitted by yoyo Li on

Hi,

I'm a fresher in abaqus. Now I'm trying to simulate the damage of brittle kind of materials, like concrete with abaqus on mesoscale. But there are some problems now...

The random meso-structure has already been generated by matlab, but I don't know how to import the information of the geometry which are some coordinates? I find the file formats which could be read by abaqus, like Autocad .dxf,.step...but I'm not sure how to do it exactly since geometry information are in terms of coodinates in matlab.

I also tried to write the coordinates into .inp, but I found the geometry can only be generated with mesh including nodes and elements. So does that mean I need to mesh it manually firstly?

Actually, I want to use lattice model with beam elements in abaqus. however, the beams can only be made on wires target. Does that mean  the mesostructure should be replaced by lattices or wires firstly?

Now, I'm confused completely. Could you help me if you'd like?

You are sincerely appreciated!

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multiscale damage evolution in composites
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phunguyen

Hi Li,

 I do not know Abaqus, however I think you have a geometry created with Matlab. But in which format? The geometry must be in the geometry format that Abaqus understands. 

There is another way of meshing the geometry using for example Gmsh (it's a free meshing program) and convert the gmsh mesh file to a Abaqus file. 

Hope it was a bit of help.

 I am working on meso-concrete as well. Could you tell me about the material models that you're using? Continuum damage or discrete crack failure for example?

 

 

 

Sat, 05/22/2010 - 15:51 Permalink
yoyo Li

Hi,nguyen

Thanks for your kind help. I'm trying with Gmsh.

The material model I use is continuum damage cause what I want to simulate is just initiation of cracks. That seems easier to go.

I have another question: do you know how to apply initial strain on solid element whatever in abaqus or ansys?

Thanks

Tue, 05/25/2010 - 20:00 Permalink