ON THE CRACK PROPAGATION ANALYSIS OF ROCK LIKE BRAZILIAN DISC SPECIMENS CONTAINING CRACKS UNDER COMPRESSIVE LINE LOADING

Authors

  • HADI HAERI PHD CANDIDATE OF ROCK MECHANICS, DEPARTMENT OF MINING ENGINEERING, SCIENCE AND RESEARCH BRANCH, ISLAMIC AZAD UNIVERSITY, TEHRAN, IRAN
  • KOUROSH SHAHRIAR PROF., DEPARTMENT OF MINING AND METALLURGICAL ENGINEERING, AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN
  • MOHAMMAD FATEHI MARJI ASSOCIATE PROF., HEAD OF MINE EXPLOITATION ENGINEERING DEPARTMENT, FACULTY OF MINING AND METALLURGY, INSTITUTION OF ENGINEERING, YAZD UNIVERSITY, YAZD, IRAN
  • PARVIZ MOAREFVAND ASSISTANT PROF., DEPARTMENT OF MINING AND METALLURGICAL ENGINEERING, AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN

Keywords:

CRACK PROPAGATION, CRACKS COALESCENCE, HIGHER ORDER DISPLACEMENT DISCONTINUITY METHOD, BRAZILIAN DISC SPECIMENS, ROCK-LIKE MATERIALS

Abstract

THE PRE-EXISTING CRACKS IN THE BRITTLE SUBSTANCES SEEM TO BE THE MAIN CAUSE OF THEIR BREAKAGE UNDER VARIOUS LOADING CONDITIONS. IN THE PRESENT PAPER, A SIMULTANEOUS ANALYTICAL, EXPERIMENTAL AND NUMERICAL ANALYSIS OF CRACK PROPAGATION, CRACKS COALESCENCE AND BREAKAGE PROCESS OF BRITTLE SUBSTANCES HAS BEEN PERFORMED. BRAZILIAN DISC TESTS ARE BEING ACCOMPLISHED TO EVALUATE THE FINAL BREAKAGE PATH IN ROCK-LIKE BRAZILIAN DISC SPECIMENS CONTAINING SINGLE AND DOUBLE CRACKS (USING ROCK-LIKE SPECIMENS SPECIALLY PREPARED FROM PORTLAND POZZOLANA CEMENT (PPC), FINE SANDS AND WATER IN A ROCK MECHANICS LABORATORY). THE BREAKING LOAD OF THE PRE-CRACKED DISC SPECIMENS ARE MEASURED SHOWING THE DECREASING EFFECTS OF THE CRACKS AND THEIR ORIENTATION ON THE FINAL BREAKING LOAD. THE SAME SPECIMENS ARE NUMERICALLY SIMULATED BY A HIGHER ORDER INDIRECT BOUNDARY ELEMENT METHOD KNOWN AS DISPLACEMENT DISCONTINUITY METHOD. THESE NUMERICAL RESULTS ARE COMPARED WITH THE EXISTING ANALYTICAL AND EXPERIMENTAL RESULTS PROVING THE ACCURACY AND VALIDITY OF THE RESULTS OBTAINED BY THE NUMERICAL METHOD. THE NUMERICAL AND EXPERIMENTAL RESULTS OBTAINED FROM THE TESTED SPECIMENS ALSO SHOW A GOOD AGREEMENT AND DEMONSTRATE THE ACCURACY AND EFFECTIVENESS OF THE PROPOSED APPROACH.

Author Biographies

HADI HAERI, PHD CANDIDATE OF ROCK MECHANICS, DEPARTMENT OF MINING ENGINEERING, SCIENCE AND RESEARCH BRANCH, ISLAMIC AZAD UNIVERSITY, TEHRAN, IRAN

DEPARTMENT OF MINING ENGINEERING

KOUROSH SHAHRIAR, PROF., DEPARTMENT OF MINING AND METALLURGICAL ENGINEERING, AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN

DEPARTMENT OF MINING ENGINEERING

MOHAMMAD FATEHI MARJI, ASSOCIATE PROF., HEAD OF MINE EXPLOITATION ENGINEERING DEPARTMENT, FACULTY OF MINING AND METALLURGY, INSTITUTION OF ENGINEERING, YAZD UNIVERSITY, YAZD, IRAN

DEPARTMENT OF MINING ENGINEERING

PARVIZ MOAREFVAND, ASSISTANT PROF., DEPARTMENT OF MINING AND METALLURGICAL ENGINEERING, AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN

DEPARTMENT OF MINING ENGINEERING

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Published

2014-03-18

Issue

Vol. 11 No. 8 (2014)

Section

Articles

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