Hi Borek,

I was wondering how can element removal be done. Is it controllable at the material level?

Thanks
Alireza

Dear Borek,

It seems that the damping implemented for the explicit dynamic is a mass-proportional damping that affects the low frequency modes specially the rigid body motion.
I use the explicit solver to solve the highly non-linear quasi-static problems. When you're dealing with a quasi-static problem, unless you apply the load/disp very slowly, you'll see a lot of (high-frequency) noise in the system (as shown in the attached figure).
And the global damping cannot damp these noises. I was wondering if in the next version of your could you could implement a stiffness proportional damping as well to solve this problem.

Thanks
Alireza

Hi Borek,

I used to use the old extractor but seems that it's incompatible with the arbitrary numbering.
So I switched to the new extractor.
The problem that I'm facing is  it seems that it has a problem to open the input file.
here is the error:

It seems that it thinks the return character is included in the file name and because of that it cannot locate the file.

I would appreciate it if you could help me with this.
Alireza

Dear Borek,

I'm implementing my Orthotropic Averaging scheme in OOFEM.
To do so, I have made new nonlocal interface and structural nonlocal interface classes to deal with an array of weights not an scalar weight.

The problem is in the StructuralElement class, the "StructuralNonlocalMaterialExtensionInterface" class is called to handle the preparations for non-local averaging and this is not the interface that my non-local scheme belongs to.

I was wondering what's your suggestion.
Shall I modify the existing non-local interfaces and make them capable of dealing with both isotropic and orthotropic averaging?

Thanks
Alireza

Hello,

It seems that there is a problem with the built-in materials idm1 and its non-local version. Both of these materials return

Using the debugger, I checked the values of variables related the Gp and they don't seem to be right. Like its numberOfGp=0 and materialMode=_Unknown!!

When I switch to any other material model, they work fine.

Regards,
Alireza

Dear Borek,

I'm running the damage propagation problem with my own material model that uses non-local averaging.
The problem is when I use under integration in my explicit dynamic analysis the damage pattern changes significantly.

Since the results of fully integration totally makes sense both in terms of load-displacement that I get and the damage pattern, I was wondering if you have any idea how under integration would change the response that dramatically?
I have attached a figure showing the damage patterns in the fully integrated (top) and under integrated (bottom).

Thanks for your helps,
Alireza

Hi Borek,

I have a model where the node numbering has some gaps in it. When I tried to report the displacement and reactions in the output file, it didn't save the reactions.
It seems that the arbitrary numbering procedure doesn't work properly.
I have attached the input file and part of the output.

Regards,
Alireza

Output:

Hi Borek,

I was going through the "nonlocalmaterialext.C" using the KDE's KDevelop editor and also MSVS. It seems that 'buildNonlocalPointTable" member lacks a "}" at its end. This is version 1.9. Version 1.8 seems fine. Would you please take a look at it.
It's weird though since it compiles with no errors.

Many thanks,
Alireza

Hello Everybody,

Recently, I tried Intel's icpc (the c++ compiler) to compile OOFEM. My experience was that it improved the running time performance of my code for about 10% (reduced the computation time by about 10% on an Intel64 based CPU). I know although Intel's compilers are free to download and install on Linux, but they're not open source and under GNU/GPL license. But I thought if you're using OOFEM for heavy and time consuming calculations, it might worth trying.

Cheers
Alireza