Abstract :
Finite element modelling of processes, where geometry of the component evolves with time, usually involves
checks/computations for contact between objects. Examples of these kinds of processes are sheet forming,
bulk forming (forging, extrusion, rolling), etc. In some cases, it may be acceptable not to perform any speciÞc
analysis on the dies and treat them as being rigid. In such cases, it is best to represent mesh models for the
rigid objects with as few elements as possible. This signiÞcantly reduces the time spent by the solver in
geometric checks for contact between objects. Hence, a module has been developed to read an existing
discrete representation (mesh or STL facets) and coarsen it based on certain user speciÞed criteria. This
module can be used as a Þlter before running the analysis. Other beneÞts of using a compact mesh model to
represent the rigid object include (a) reduced memory usage by the application, (b) a smaller results database,
(c) faster visualization algorithms, and (d) faster transmission of mesh model data across networks. Results
from the Þnite element analysis of a forging process, performed with a commercial solver, are presented.
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