Prediction of Indentation Size Formed by a High-Velocity Impingement of a Solid Sphere Based on an Expanding Cavity Model

Kiyohiro Ito; Masayuki Arai

doi:10.4028/www.scientific.net/KEM.827.355

Paper Titles

Photoelastic Analysis of the Stressed State of a Flat Element with Geometrical Stress Concentrators (Cutout and Cuts)
p.330

Low Cycle Fatigue Behavior of Superalloy GH4169 in High Temperature Gas Environment
p.336

Comprehensive Numerical Simulation on Thermally Grown Oxide and Internal Stress Evolutions in Thermal Barrier Coatings
p.343

Damage Analysis of Thermal Barrier Coatings Subjected to a High-Velocity Impingement of a Solid Sphere
p.349

Prediction of Indentation Size Formed by a High-Velocity Impingement of a Solid Sphere Based on an Expanding Cavity Model
p.355

Damage Evaluation of TBC by Rapid Thermal Cycling Test Utilizing a Laser Irradiation
p.361

Numerical Simulation of Volcanic Ash Infiltration into Thermal Barrier Coatings
p.367

Morphology Evolution and Probability Characteristic of γ' Phase in Single Crystal Superalloy during Creep Rafting
p.373

An Approach for Predicting the Initiation of Ductile Fracture in Plane Strain Rolling
p.379

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Prediction of Indentation Size Formed by a High-Velocity Impingement of a Solid Sphere Based on an Expanding Cavity Model

Abstract:

The fan blades and turbine blades in a jet engine are seriously damaged by high velocity impingements of various foreign objects. In this study, a prediction method of indentation size formed by a high-velocity impingement of a solid sphere (PMIS) was developed from a theoretical model based on an expanding cavity model and energy conservation before and after impingement. The Johnson-Cook constitutive equation was employed to introduce effects of work hardening, strain rate hardening and thermal softening into the cavity model. As a result, the distribution of equivalent plastic strain, equivalent plastic strain rate, temperature and equivalent von Mises stress estimated using the expanding cavity model was in good agreement with the data obtained from the finite element analysis. In addition, it has been demonstrated that PMIS can accurately predict the radius of indentation formed on various metallic materials subjected to the impingement of a solid sphere with the radii of 0.75, 1.5 and 3 mm at several impact velocities from 50 to 300 m/s.