Wave and Fracture Phenomena in Impacted Ceramics
Abstract
Experiments have been performed to investigate the fracture behaviour of pressure wave loaded alumina tiles. The waves were produced by impacting steel projectiles at a speed range between 100 and 1200m/s. The investigation of the damage generation phase was made possible by a newly developed special loading and observation arrangement. The tiles were impacted edge on and observed was one of the large surfaces by a photographic high speed technique in combination with the shadow optical method. The aim was to observe the fracture appearance and, based on this, to understand energy absorbing processes. The results were compared with those of earlier experiments with glass slabs. It was found that alumina behaves quite different than glass. From a fracture mechanics point of view it was most surprising that no distinct terminal crack velocity could be found as was expected and was experienced with glass. Keywords: Alumina; High speed photography; Shadow optical method; Terminal crack velocity; Specific wave energy; Energy absorption mechanism; Crack nucleation; Fractography.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 10, 1989
- Accession Number
- ADA213454
Entities
People
- H. Rothenhausler
- H. Senf
- S. Winkler