Micromechanics-based damage model for liquid-assisted healing

Micromechanics-based damage model for liquid-assisted healing

This work presents a damage evolution framework including liquid-assisted healing. The model incorporates contributions from void size, void pressure, surface tension and liquid pressure. Experimental motivation for the damage-healing model is provided with in-situ melting experiments, where the evo...

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Veröffentlicht in:International journal of damage mechanics 2021-01, Vol.30 (1), p.123-144
Hauptverfasser: Siroky, Georg, Kraker, Elke, Kieslinger, Dietmar, Kozeschnik, Ernst, Ecker, Werner
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container_issue 1
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container_title International journal of damage mechanics
container_volume 30
creator Siroky, Georg
Kraker, Elke
Kieslinger, Dietmar
Kozeschnik, Ernst
Ecker, Werner
description This work presents a damage evolution framework including liquid-assisted healing. The model incorporates contributions from void size, void pressure, surface tension and liquid pressure. Experimental motivation for the damage-healing model is provided with in-situ melting experiments, where the evolution of the void distribution under monotonic tension is illustrated. The damage evolution is based on nucleation and growth of voids, which are modeled in a unified creep and plasticity framework. The proposed damage formulation introduces a void collective, which computes the void distribution in the material and allows to describe void collapse using the Rayleigh-Plesset equation. The necessary conditions for healing are discussed with use of model results. Particularly, the role of external load during healing, the dependence on liquid viscosity and surface tension are investigated.
doi_str_mv 10.1177/1056789520948561
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