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An Experimental Study of Crack Coalescence Behaviour in Rock-Like Materials Containing Multiple Flaws Under Uniaxial Compression

Experiments on man-made flawed rock-like materials are applied extensively to study the mechanical behaviour of rock masses as well as crack initiation modes and crack coalescence types. A large number of experiments on specimens containing two or three pre-existing flaws were previously conducted....

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Published in:Rock mechanics and rock engineering 2014-11, Vol.47 (6), p.1961-1986
Main Authors: Zhou, X. P., Cheng, H., Feng, Y. F.
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Language:English
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cited_by cdi_FETCH-LOGICAL-a472t-db96e052df77cc2b74b1c53ce1da9b24d8a7cc61ff3ee2a7255c770ed2abe9e63
cites cdi_FETCH-LOGICAL-a472t-db96e052df77cc2b74b1c53ce1da9b24d8a7cc61ff3ee2a7255c770ed2abe9e63
container_end_page 1986
container_issue 6
container_start_page 1961
container_title Rock mechanics and rock engineering
container_volume 47
creator Zhou, X. P.
Cheng, H.
Feng, Y. F.
description Experiments on man-made flawed rock-like materials are applied extensively to study the mechanical behaviour of rock masses as well as crack initiation modes and crack coalescence types. A large number of experiments on specimens containing two or three pre-existing flaws were previously conducted. In the present work, experiments on rock-like materials (formed from a mixture of sand, plaster, limestone and water at mass ratio of 126:9:9:16) containing multiple flaws subjected to uniaxial compression were conducted to further research the effects of the layout of pre-existing flaws on mechanical properties, crack initiation modes and crack coalescence types. Compared with previous experiments in which only three types of cracks were found, the present experiments on specimens containing multiple flaws under uniaxial compression revealed five types of cracks, including wing cracks, quasi-coplanar secondary cracks, oblique secondary cracks, out-of-plane tensile cracks and out-of-plane shear cracks. Ten types of crack coalescence occurred through linkage among wing cracks, quasi-coplanar secondary cracks, oblique secondary cracks, out-of-plane shear cracks and out-of-plane tensile cracks. Moreover, the effects of the non-overlapping length and flaw angle on the complete stress–strain curves, the stress of crack initiation, the peak strength, the peak strain and the elastic modulus were also investigated in detail.
doi_str_mv 10.1007/s00603-013-0511-7
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P.</creatorcontrib><creatorcontrib>Cheng, H.</creatorcontrib><creatorcontrib>Feng, Y. F.</creatorcontrib><title>An Experimental Study of Crack Coalescence Behaviour in Rock-Like Materials Containing Multiple Flaws Under Uniaxial Compression</title><title>Rock mechanics and rock engineering</title><addtitle>Rock Mech Rock Eng</addtitle><description>Experiments on man-made flawed rock-like materials are applied extensively to study the mechanical behaviour of rock masses as well as crack initiation modes and crack coalescence types. A large number of experiments on specimens containing two or three pre-existing flaws were previously conducted. 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identifier ISSN: 0723-2632
ispartof Rock mechanics and rock engineering, 2014-11, Vol.47 (6), p.1961-1986
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1434-453X
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source Springer Nature
subjects Applied sciences
Building failures (cracks, physical changes, etc.)
Buildings. Public works
Civil Engineering
Coalescence
Coalescing
Compressing
Crack initiation
Cracks
Defects
Durability. Pathology. Repairing. Maintenance
Earth and Environmental Science
Earth Sciences
Exact sciences and technology
Fracture mechanics
Geological engineering
Geophysics/Geodesy
Geotechnics
Limestone
Mechanical properties
Original Paper
Rocks
Sand
Soil mechanics. Rocks mechanics
Strain
Strength of materials (elasticity, plasticity, buckling, etc.)
Stress-strain curves
Structural analysis. Stresses
title An Experimental Study of Crack Coalescence Behaviour in Rock-Like Materials Containing Multiple Flaws Under Uniaxial Compression
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