Title :
Isothermal depolarization currents in marble rocks subjected to different stress modes before fracture
Author :
Stavrakas, I. ; Anastasiadis, C. ; Triantis, D. ; Vallianatos, F.
Author_Institution :
Dept. of Electron., Technol. Educ. Inst. of Athens, Greece
Abstract :
The technique of isothermal depolarization currents (IDC) was applied on natural polycrystalline marbles collected from Mt. Penteli (Greece) in order to investigate the changes of IDC relaxation parameters when the samples have suffered previously uniaxial compressional stress of various magnitudes, up to fracture. Experimental results manifest a differentiation in the shape of the depolarization current curves when the geo-material has suffered stress adequate to cause microcracks in its structure.
Keywords :
compressive strength; dielectric depolarisation; dielectric relaxation; fracture; internal stresses; microcracks; rocks; depolarization current curves; fracture; geomaterial; isothermal depolarization current relaxation parameters; microcracks; polycrystalline marble rock structure; stress modes; uniaxial compressional stress; Conductivity; Delay; Dielectrics; Educational institutions; Educational technology; Isothermal processes; Permittivity; Polarization; Solids; Stress;
Conference_Titel :
Solid Dielectrics, 2004. ICSD 2004. Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8348-6
DOI :
10.1109/ICSD.2004.1350541
