Analytical Modeling of Subsonic Particle Erosion

摘要

An analytical approach to particle erosion of solid surfaces is developed based on a model of erosion pit nucleation and growth. The Hertzian theory of impact is used to introduce the kinematic and material parameters into this general statistical formulation of erosion processes. In order to minimize the number of unknown factors in the initial development of a predictive erosion theory, the particular case of solid spherical particles impacting directly on the plane surface of an elastic half-space is investigated. Erosion tests were conducted on the AFML-Bell erosion apparatus in conjunction with the modeling studies. The erosion mechanisms in fused silica was identified when eroded by multiple impacts of spherical glass beads. (Author)