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Triaxial test for concrete specimen

Asked by Mike

Hello YADE users,
I want to simulate a trixial test for foam concrete. As I know there are two examples in source code to simulate the test, which are https://github.com/yade/trunk/tree/master/examples/triax-tutorial (1) and https://github.com/yade/trunk/blob/master/examples/concrete/triax.py#L143 (2)

When looking into the two scripts, I saw (1) using ThreeDTriaxialEngine while (2) just apply prestress for the facets.

Could any one please help me to show the advantages of each method? in my case, simulation of a trixial test for foam concrete, which method should be better?

Thank you so much!
Mike

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Jan Stránský (honzik) said : 		#1

Hi Mike,

I see the biggest difference, that the approach with facets can be applied to more general shapes (like cylinder). On box shaped sample, both approaches should give comparable results.

cheers
Jan

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Mike (ntthangvn) said : 		#2

Thank you for your quick response Jan,
That helps me alot. Also, I intend to improve the triax.py script (with facets) by apply the wall on the top and bottom instead of apply velocity for particles, in which I could control the force-->>deviatoric stress. Is that a good idea?
Cheers,
Mike

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Jan Stránský (honzik) said : 		#3

> Is that a good idea?

Sounds reasonable. But before an idea is tested and proved to be good, it is better not to guarantee it :-)
cheers
Jan

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Mike (ntthangvn) said : 		#4

thank you, Jan. that solved my problems!
regards,
Mike