High-Speed Photographic Study of Wave Propagation and Impact Damage in Fused Silica and AlON Using the Edge-On Impact (EOI) Method

Journal Article · Fri Jul 28 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2263465· OSTI ID:20875788

Strassburger, E ^[1]; Patel, P; McCauley, J W ^[2]; Templeton, D W ^[3]

---

1. Fraunhofer-Institut fuer Kurzzeitdynamik, Ernst-Mach-Institut (EMI), Am Klingelberg 1, 79588 Efringen-Kirchen (Germany)
2. US Army Research Laboratory, Aberdeen Proving Ground, MD 21005 (United States)
3. US Army TARDEC, Warren, MI (United States)

An Edge-on Impact (EOI) technique, developed at the Ernst-Mach-Institute (EMI), coupled with a Cranz-Schardin high-speed camera, has been successfully utilized to visualize dynamic fracture in many brittle materials. In a typical test, the projectile strikes one edge of a specimen and damage formation and fracture propagation is recorded during the first 20 {mu}s after impact. In the present study, stress waves and damage propagation in fused silica and AlON were examined by means of two modified Edge-on Impact arrangements. In one arrangement, fracture propagation was observed simultaneously in side and top views of the specimens by means of two Cranz-Schardin cameras. In another arrangement, the photographic technique was modified by placing the specimen between crossed polarizers and using the photo-elastic effect to visualize the stress waves. Pairs of impact tests at approximately equivalent velocities were carried out in transmitted plane (shadowgraphs) and crossed polarized light.

• OSTI ID: 20875788
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 845; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAMERAS
DAMAGE
FRACTURES
IMPACT TESTS
PHOTOGRAPHY
PRESSURE DEPENDENCE
SILICA
SILICON OXIDES
STRESSES
VELOCITY
VISIBLE RADIATION
WAVE PROPAGATION