A MECHANISM FOR THE PRODUCTION OF ELECTROMAGNETIC-RADIATION DURING FRACTURE OF BRITTLE MATERIALS

Authors
OKEEFE SG THIEL DV
Citation
Sg. Okeefe et Dv. Thiel, A MECHANISM FOR THE PRODUCTION OF ELECTROMAGNETIC-RADIATION DURING FRACTURE OF BRITTLE MATERIALS, Physics of the earth and planetary interiors, 89(1-2), 1995, pp. 127-135
Citations number
19
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Physics of the earth and planetary interiors → ACNP
ISSN journal
00319201
Volume
89
Issue
1-2
Year of publication
1995
Pages
127 - 135
Database
ISI
SICI code
0031-9201(1995)89:1-2<127:AMFTPO>2.0.ZU;2-P
Abstract
The feasibility of the charge separation model as the source of electr omagnetic radiation received from the fracture of brittle materials is demonstrated. An analytical expression and a finite difference method enable the calculation of currents flowing around the tip of a crack. Results from the model compare favourably with fracture events record ed from ice samples. Changes in material conductivity affect pulse sha pe although changes in crack surface conductance and not crack apex co nductance cause most variation in the received signal.