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    Influence of Two Cross-Flaws Geometry on the Strength and Crack Coalescence of Rock-Like Material Specimens under Uniaxial Compression

    Source: International Journal of Geomechanics:;2020:;Volume ( 020 ):;issue: 008
    Author:
    B. Zhang
    ,
    Y. Li
    ,
    X. Y. Yang
    ,
    S. C. Li
    ,
    B. Liu
    ,
    Z. H. Xu
    ,
    Y. Pei
    DOI: 10.1061/(ASCE)GM.1943-5622.0001757
    Publisher: ASCE
    Abstract: Cross-flaws are very common in natural rocks. To date, the understanding of the failure process of rocks with cross-flaws is very limited. In this research, we study the influence of the cross-flaws geometry on the rock strength and coalescence modes with rock-like specimens. In this work, three groups of specimens with pre-existing cross-flaws are investigated: two aligned cross-flaws, two step cross-flaws, and two collinear primary flaws. The crack propagation and strength of specimens containing two parallel flaws are also studied to compare the results with those of specimens with cross-flaws. The results demonstrate that the cross-flaw geometry influences the rock bridge coalescence patterns in rock-like specimens. Specimens with two aligned cross-flaws and two step cross-flaws coalesce with tensile cracks in the rock bridge areas, while specimens with two collinear primary flaws coalesce with shear cracks. Specimens containing two cross-flaws may have a higher uniaxial compressive strength than specimens containing two parallel flaws, and the number of specimens with a higher uniaxial compressive strength is influenced by the cross-flaws geometry in the different groups. The cross-flaws geometry influences the strength of the specimens. In this research, specimens in the group containing two aligned cross-flaws have the highest mean uniaxial compressive strength, and specimens in the group with two step cross-flaws have the lowest strength.
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      Influence of Two Cross-Flaws Geometry on the Strength and Crack Coalescence of Rock-Like Material Specimens under Uniaxial Compression

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4268740
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    • International Journal of Geomechanics

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    contributor authorB. Zhang
    contributor authorY. Li
    contributor authorX. Y. Yang
    contributor authorS. C. Li
    contributor authorB. Liu
    contributor authorZ. H. Xu
    contributor authorY. Pei
    date accessioned2022-01-30T21:43:51Z
    date available2022-01-30T21:43:51Z
    date issued8/1/2020 12:00:00 AM
    identifier other%28ASCE%29GM.1943-5622.0001757.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4268740
    description abstractCross-flaws are very common in natural rocks. To date, the understanding of the failure process of rocks with cross-flaws is very limited. In this research, we study the influence of the cross-flaws geometry on the rock strength and coalescence modes with rock-like specimens. In this work, three groups of specimens with pre-existing cross-flaws are investigated: two aligned cross-flaws, two step cross-flaws, and two collinear primary flaws. The crack propagation and strength of specimens containing two parallel flaws are also studied to compare the results with those of specimens with cross-flaws. The results demonstrate that the cross-flaw geometry influences the rock bridge coalescence patterns in rock-like specimens. Specimens with two aligned cross-flaws and two step cross-flaws coalesce with tensile cracks in the rock bridge areas, while specimens with two collinear primary flaws coalesce with shear cracks. Specimens containing two cross-flaws may have a higher uniaxial compressive strength than specimens containing two parallel flaws, and the number of specimens with a higher uniaxial compressive strength is influenced by the cross-flaws geometry in the different groups. The cross-flaws geometry influences the strength of the specimens. In this research, specimens in the group containing two aligned cross-flaws have the highest mean uniaxial compressive strength, and specimens in the group with two step cross-flaws have the lowest strength.
    publisherASCE
    titleInfluence of Two Cross-Flaws Geometry on the Strength and Crack Coalescence of Rock-Like Material Specimens under Uniaxial Compression
    typeJournal Paper
    journal volume20
    journal issue8
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/(ASCE)GM.1943-5622.0001757
    page11
    treeInternational Journal of Geomechanics:;2020:;Volume ( 020 ):;issue: 008
    contenttypeFulltext
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