Correlation between the electric and acoustic signals emitted during compression of brittle materials

Ermioni D Pasiou,Dimos Triantis

doi:10.3221/igf-esis.40.04

Abstract

An experimental protocol is described including a series of uniaxial compression tests of three brittle materials (marble, mortar and glass). The Acoustic Emission (AE) technique and the Pressure Stimulated Currents (PSC) one are used since the recordings of both techniques are strongly related to the formation of cracking in brittle materials. In the present paper, the correlation of these techniques is investigated, which is finally proven to be very satisfactory.

Highlights

Monitoring the mechanical response of various brittle materials under compressive loading is of great interest in a range of application fields
Damage process is well detected by the Pressure Stimulated Currents (PSC) technique [4] and more specific by the weak electric signals emitted during the generation of micro-cracks in brittle materials when they are subjected to mechanical loading [5,6]
EAE EPSC m, where m~0.8 for both marble and glass specimens while m~0.7 for mortar specimens (Figs.6(a-c)). The correlation of both experimental techniques used in the present experimental protocol is highlighted

Summary

Introduction

Monitoring the mechanical response of various brittle materials under compressive loading is of great interest in a range of application fields. Damage process is well detected by the Pressure Stimulated Currents (PSC) technique [4] and more specific by the weak electric signals emitted during the generation of micro-cracks in brittle materials when they are subjected to mechanical loading [5,6].

Results

Conclusion