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A Study on Microscopic Fractrue Behavior of Mortar Using Acoustic Emission

음향방출을 이용한 mortar 재료의 미시적 파괴거동에 관한 연구

  • 이준현 (부산대학교 기계공학부) ;
  • 이진경 (부산대학교 기계설계공학과) ;
  • 장일영 (금오공과대학교 토목공학과) ;
  • 윤동진 (한국표준과학연구원 방재기술센터)
  • Published : 1998.12.01

Abstract

It is well recognized recently that acoustic emission, which is an elastic wave generated from rapid release of elastic energy in steressed solids, is very useful tool for on-line monitoring of microscopic behavior of deformation of material. In this study, three point bend test was performed to evaluate the microscopic damage progress during the loading and failure mechanism of mortar beam by monitoring the characteristic of AE signal. The relationship between AE characteristic and microscopic failure mechanism is discussed. In addition 2 dimensional AE source location based on triangular method was also done to monitor the intiation and propagation of micro crack around notch tip of mortar beam. It was shown that AE source location was very effective to predict the growth behavior of micro crack in mortar beam specimen.

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