elasto-plastic contact force

Hello, Christophe, Hello all,
Is elasto-plastic pair style implemented in Liggghts? Thank you
Cheers,
Zyan

Forums:

LIGGGHTS® - User Forum

ckloss | Wed, 10/22/2014 - 11:00

Hi zyan,

which model do you mean in particular?

Christoph

ZYan | Tue, 10/28/2014 - 10:09

Hi Christoph,

Hi Christoph,
i mean elastic-plastic model counts for plastic deformation at contact for soft particles. not the epsd model for rolling torque.

Here i gave one example:
the contat force Fp = 6c^2*σy*R0*h; where the constant c^2 = 1.43 for ideally plastic material behavior, σy: yeild stress.
Ref. C.L. Martin, Elasticity, fracture and yielding of cold compacted metal powders,Journal of the Mechanics and Physics of Solids, vol. 52, pp. 1691-1717, 2004.

Do you have someting similar?

Cheers,
Zilin

ckloss | Thu, 10/30/2014 - 14:59

At the moment we're working

At the moment we're working with the developers of this model
http://www.sciencedirect.com/science/article/pii/S0032591014005415
to get this into LIGGGHTS, but there is no time-tine for release yet.

But simple plastic deformation models should be pretty easy/straight forward to implement

best wishes
Christoph

ZYan | Fri, 10/31/2014 - 11:30

Hi Christophe, Thank you for

Hi Christophe, Thank you for your answer and the reference as well. Cheers, Zyan