Il giorno 20 apr 2021, alle ore 11:02, Yves Renard <Yves.Renard@insa-lyon.fr>
Through its Python interface, GetFEM offers generic tools for complex modeling
and evolutionary equations, even non-linear ones, can be taken into account
using the weak form language (GWFL). Practical tools for managing meshes,
regions in these meshes, meshes cut by level-sets complete the system, as well
as post-processing functions. These tools allow to build complex static or
transient codes, but of course, GetFEM is above all a toolbox, not a ready-made
code allowing to do simulations quickly.
Examples are given in the interface/src/python directory on basic modeling. In
particular, it may be interesting to follow the tutorial example
http://getfem.org/tutorial/index.html on the thermo-elastic problem.
On 19/04/2021 18:48, Lorenzo Ferro wrote:
I need to simulate a flash-butt welding process, where two steel bars are
welded together, head to head, applying electrical current (flash welding)
until the bar heads reach the melting temperature, eventually pushing them
together to make the joint.
During this process, some metal reaches the melting point (almost evaporation)
and bursts away, so some metal is lost during the heating phase and the two
bars must be brought closer together to keep the current flowing and the
process going on.
So the model would include (at least):
A) a transient thermal simulation with external convection and radiation
B) internal heat generated by joule effect
C) non-linear material properties
D) elements removal from the simulation once the melting temperature has been
reached, with consequent change of boundary elements on the heads of the bars
E) moving the bars closer, step-by-step, to restore the surface contact and
current flow (no need of a real contact function, contact can be estimated
based on the boundary elements distance, since some current can flow also when
the faces are enough close).
To do so I've two options:
1) making a simulation model with a programming language like Python, etc...
2) exploring the usage of the GetFEM library. At the end of the work, a new
scientific article will follow. The simulation is only the first part, the
article will also include a part related to the automation control of the
i) can GetFEM be convenient for the implementation of the above mentioned
ii) does GetFEM allows to implement all of the above features?
iii) principally, can you give me guidance about the needed GetFEM native
I've never used GetFEM before but I'd like to learn how to use it, also in view
of other future projects and publications.
Thank you in advance.
Yves Renard (Yves.Renard@insa-lyon.fr) tel : (33) 04.72.43.87.08
20, rue Albert Einstein
69621 Villeurbanne Cedex, FRANCE