Simulation of self-healing processes in microcapsule based self-healing polymeric systems
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/191933
Tipus de documentText en actes de congrés
Data publicació2015
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
Self healing materials are becoming more and more important for the construction of
mechanical components due to their ability to detect and heal failures and cracks autonomously.
Especially in polymers and polymer-composites, where the component can loose a high rate of
strength and durability due to micro cracks, those damages are nearly impossible to repair from
outside. Thus, self healing ability is a very effective approach to extend the lifetime of polymermade
components.
In view of the numerical simulation of such self healing effects we develop a thermodynamically
consistent macroscopic 5-phase model within the theoretical framework of the Theory of
Porous Media. The model consists of the following different phases: solid (matrix material)
with dispersed catalysts, liquid (healing agents), healed material and gas (air inside the cracks).
The increase of damage is driven by a discontinuous damage evolution equation. Furthermore, a
mass exchange between the liquid-like healing agents and the solid-like healed material, i.e. the
change of the aggregate state from liquid healing to solid healed material, describes the healing
process. The onset of the healing process is associated with the break open of the microcapsules
in connection with the subsequent motion of the liquid healing agents. A numerical example of
the simulation of damage and healing processes in polymers, is presented in order to show the
applicability of the model.
ISBN978-84-943928-3-2
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