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Visualization of Impact Damage in Ceramics Using the Edge‐On Impact Technique
Author(s) -
Strassburger E.
Publication year - 2004
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2004.tb00175.x
Subject(s) - projectile , materials science , ceramic , brittleness , fracture mechanics , hypervelocity , enhanced data rates for gsm evolution , fracture (geology) , composite material , computer science , physics , metallurgy , telecommunications , thermodynamics
Projectile impact generates severe fragmentation in ceramics which propagates at high velocities and precedes the penetration of the projectile. The high‐speed photographic technique of the Edge‐On Impact (EOI) has been developed at the Ernst‐Mach‐Institute (EMI) in order to visualize dynamic fracture in brittle materials. In a typical EOI test the projectile hits one edge of a specimen and fracture propagation is observed during the first 20 us after impact by means of a Cranz‐Schardin highspeed camera. EOI tests allow a characterization of different ceramics by the macroscopic fracture patterns, single crack velocities, and crack front velocities (damage velocities). The phenomenology of damage propagation in several ceramics and a ceramic‐metal composite is discussed. The EOI technique is useful for the evaluation of damage models for brittle materials because it enables a direct comparison of model predictions to experimental data obtained during the impact process.