Limit on macroscopic Poisson's Ratio
Hello!
In a recently defended doctoral dissertation
(available online - https:/
I found an information that the maximum value of Poisson’s ratio that can be obtained with discrete element model
is 0.25 for bonded spherical elements and 0.33 for bonded disc elements:
"(...) Predominantly in discrete element formulation, particles are treated
as rigid and overlap between particles is allowed, assuming it to be equivalent to the particle
deformation at the contact. This approach is known as the soft contact approach.
The particle overlap is used in an appropriate contact model which offers an advantage
of obtaining the desired macroscopic behaviour. However, despite using the soft-contact
approach, assumed particle rigidity makes the accurate representation of macroscopic
properties in DEM a great challenge and even impossible in some cases. For instance,
the maximum value of Poisson’s ratio that can be obtained with discrete element model
is 0.25 for bonded spherical elements and 0.33 for bonded disc elements. (...)"
I am curious if it is a general rule, valid also in ESyS-Particle simulations?
I would like to ask also about variability of microscopic Poisson's ratio. Does it change in range 0-0.5, like macroscopic Poisson's ratio, or maybe higher values are also available?
Best wishes,
Piotr Klejment
Question information
- Language:
- English Edit question
- Status:
- Solved
- Assignee:
- No assignee Edit question
- Solved by:
- Dion Weatherley
- Solved:
- Last query:
- Last reply: