Polarization-depolarization process in glass during percussion drilling

A. Rabinovitch, V. Frid, J. Goldbaum, D. Bahat

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In addition to short individual high-frequency signals and their strings, which are well known and analysed, electromagnetic radiation measured during percussion drilling of glass showed a group of lengthy pulses usually appearing in pairs (denoted a-b). In order to understand their origin a polarization-depolarization process is invoked. Thus it is assumed that, during drilling, stress is accumulated in the sample, its increase being accompanied by a polarization increase, which is undetected by the equipment. When stress reaches a critical value, large crack propagation ('chip' fragmentation) begins, and a group a signal is emitted. Crack propagation causes stress and polarization relaxation, and the latter is detected as a group b signal.

Original languageEnglish
Pages (from-to)2929-2940
Number of pages12
JournalPhilosophical Magazine
Issue number25
StatePublished - 1 Sep 2003

ASJC Scopus subject areas

  • Condensed Matter Physics


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