Dear LIGGGHTS experts
I have just started using Liggghts and have two questions regarding the bod models:
(1) Like elastic bonds, can we also model plastic or elastoplastic bonds between the atoms. A typical bi-linear elastoplastic stress strain curve is attached.
(2) Can we model cohesive-zone based bond failure, an example traction-separation curve is attached.
Thanks
| Attachment | Size |
|---|---|
 Q1_Elastoplastic | 27.3 KB |
| Q2_cohesive zone | 13.64 KB |
mschramm | Thu, 09/24/2020 - 00:59
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Hello,
Currently, I believe the only other type of bond available to be used (outside of what is used in LAMMPS) is the linear granular bond.
You could certainly start with this granular bond and implement this type of bond as the granular bond makes use of history values per bonded atom pair already.
You would simply extend the history value number to be able to store the directional data needed.