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Phase‐field model for erosion processes
Author(s) -
Henning Carla,
Brodbeck Maximilian,
Koch Christian,
Staudacher Stephan,
Ricken Tim
Publication year - 2021
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.202000282
Subject(s) - erosion , gas compressor , mechanics , materials science , dissipative system , phase (matter) , field (mathematics) , jet (fluid) , particle (ecology) , mechanical engineering , geology , engineering , physics , thermodynamics , mathematics , paleontology , oceanography , quantum mechanics , pure mathematics
Solid particle erosion is one of the main damage mechanisms in high‐pressure compressors of jet engines. The significant shape change of the compressor blades leads to performance degradation over lifetime. To enhance predictive capabilities of erosive wear measurements under conditions, related to high pressure compressors, were performed. Even if there is no general model to describe erosive wear, it is understood that the transfer of kinetic energy from the impacting particle into the material is a central aspect in modelling erosion. In order to predict erosive wear of general geometries, Schrade et al. [9] developed a numerical model, based mainly on experimentally determined erosion rates. The shortcoming of such modelling approaches is the limited applicability in situations deferring to the measurement conditions. In the following, we will describe a physically based damage model, closing the gap between measurement and calculating shape changes of general specimens. Based on the phase‐field approach for predicting crack evolution presented by Miehe et al. [6], an overall energy balance of the considered specimen is constructed. A dissipative portion describes the influence of propagating damage, while special boundary conditions provides information about the energy transfer between impinging particles and specimen.