using LIGGGHTS for modelling continuous materials

Submitted by dxvn818 on Mon, 08/20/2018 - 08:31

Hello all,

I would like to ask whether LIGGGHTS can be used for modelling continuous materials ? For example, modelling tensile test of aluminium specimen, then compare the stress-strain diagram with experimental data. Has anybody had experience with it ?

Thank you.
Vinh

Forums:

paul | Mon, 08/20/2018 - 19:55

Using the BONDS fork, you may have success in modelling material fatigue / breakage. Check out the work of Antonyuk for an example.

Otherwise, why not use FEM like a normal person? If you only look for deformation without breakage you won't exploit the advantage of using discrete elements.

dxvn818 | Tue, 08/21/2018 - 03:33

Hi Paul,

Yes, the main reason I use DEM is that I must deal with material failure and the material structure with coating layer and reinforcement is too complicated to use FEM or XFEM.

I am new to LIGGGHTS, could you please show me how to check out the Antonyuk 's work ? Is it available in LIGGGHTS-PUBLIC ?

Thank you.
Vinh

dxvn818 | Wed, 08/22/2018 - 06:24

Hi Paul,

Thanks for your references. I have solved my problem by cohesive beam approach in GranOO, which is another DEM open source software, however, I need the coupling ability of LIGGGHTS and want to test spring-dashpot approach, that 's why I only focus on LIGGGHTS at this time. I will look for LIGGGHTS with BONDS to see how it works.

Vinh