Particle finite element simulation of extrusion proceses of fresh concrete during 3d-concrete-printing
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Abstract
In this work, a numerical model based on the Particle Finite Element Method (PFEM)
for the simulation of extrusion-based additive manufacturing of fresh concrete is
presented. The balance of momentum and mass are solved with a mixed velocity-pressure formulation
in an updated Lagrangian framework. The constitutive law is based on a Bingham model, that is
approximated by a Perzyna formulation in order to account for the elastic regime
before yielding, which is relevant for the analysis of printed material at rest. The channel flow
test, a numerical benchmark for the flow of fresh concrete, is used to validate the model.
Finally, 2D examples of extrusion-based additive manufacturing processes of fresh concrete are
discussed.