Mechanical model for failure modes of rock and soil under compression

Tang, Liansheng; Sang, Hanfei; Song, Jing; Luo, Zhengxiu; Yi, Sun

doi:10.1016/s1003-6326(16)64366-2

Cited by 17 publications

(10 citation statements)

References 12 publications

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“…With this model, the failure modes of rock and soil under compression can be easily explained. The research results also find (Tang et al , 2016): shear failure and tension failure can co-exist at the same time in the porous rock and soil under compressive loading, and the failure modes (shear failure, tensile failure or hybrid failure) depend on whether the stress state of the geotechnical materials first meets the Mohr–Coulomb yield criterion, the tensile failure criteria or both at almost the same time based on the tensile joint shear strength criterion. This can be simply determined by the mechanical criterion set up for the failure modes of rock and soil under compression.…”

Section: Other Analysis and Discussionmentioning

confidence: 77%

“…The inner tensile stress and the dissipation and conversion of energy are analyzed for the porous structure of rock and soil under compression, and the tensile failure criterion of this structure under compression is established in Ref (Tang et al , 2016). Combined with the shear strength criterion of Mohr–Coulomb, a tensile joint shear strength criterion is built, and thus a mechanical criterion model concerning the failure modes of rock and soil under compression is established.…”

Section: Other Analysis and Discussionmentioning

confidence: 99%

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Special review: Mechanical investigation on failure modes of reticular porous metal foams under different loadings in engineering applications

Liu

2021

MMMS

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PurposeThe purpose of this paper is to provide a summarization and review of the present author's main investigations on failure modes of reticular metal foams under different loadings in engineering applications.Design/methodology/approachWith the octahedral structure model proposed by the present authors themselves, the fundamentally mechanical relations have been systematically studied for reticular metal foams with open cells in their previous works. On this basis, such model theory is continually used to investigate the failure mode of this kind of porous materials under compression, bending, torsion and shearing, which are common loading forms in engineering applications.FindingsThe pore-strut of metal foams under different compressive loadings will fail in the tensile breaking mode when it is brittle. While it is ductile, it will tend to the shearing failure mode when the shearing strength is half or nearly half of the tensile strength for the corresponding dense material and to the tensile breaking mode when the shearing strength is higher than half of the tensile strength to a certain value. The failure modes of such porous materials under bending, torsional and shearing loads are also similarly related to their material species.Originality/valueThis paper presents a distinctive method to conveniently analyze and estimate the failure mode of metal foams under different loadings in engineering applications.

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Section: Other Analysis and Discussionmentioning

confidence: 77%

Section: Other Analysis and Discussionmentioning

confidence: 99%

Special review: Mechanical investigation on failure modes of reticular porous metal foams under different loadings in engineering applications

Liu

2021

MMMS

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“…You and Hua [38] presented four failure modes of rock under uniaxial compression conditions: tension failure, penetrating shear failure, approximately conical tension failure, and fracture failure of rock fragments. Tang et al [39] indicated that the failure modes of rock and soil in uniaxial and triaxial compression tests can be divided into five failure types: splitting, tension shear, shear, dilatancy, and bulging. Niu et al [40] believed that the main failure mode of sandstone under uniaxial compression was splitting, and a few samples exhibited shear failure.…”

Section: Experimental Systemmentioning

confidence: 99%

Study on Failure Modes and Energy Evolution of Coal-Rock Combination under Cyclic Loading

Song

Liu

Tan

et al. 2020

Shock and Vibration

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The loading modes and roof lithology have a significant influence on the mechanical properties of coal seams. To reveal the failure modes and energy evolution law of underground coal during the mining process, conventional uniaxial and uniaxial cyclic loading tests were carried out on three types of samples: coal, rock, and coal-rock combinations. The results show that the samples mainly behave with three failure modes (shear slip, tensile splitting, and fracture), and all the coal sections in the coal-rock combinations fail, whereas most rock sections remain intact. The compressive strength of the coal-rock combination is higher than coal and much smaller than rock. Compared with the conventional uniaxial loading condition, both the maximum deformation before failure and Young’s modulus under the cyclic loading condition are greater, and the latter increases quadratically with the cycle index. The energy densities are also calculated, and their variations are analysed in detail. The results show that with increasing cycle index, both the elastic energy stored in the sample and the dissipated energy increase in a quadratic function, and the failure process becomes more intense. This research reveals the failure modes, deformation characteristics, and energy evolution of the coal-rock combination under different loading conditions, which can provide strong support for controlling underground surrounding rocks of the coal face and roadway in coalmines.

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“…Considering the analysis of rock, soil, and concrete against shear strength, the Mohr-Coulomb criterion (equation 1) can be used to analyse the shear resistance of CGCAB [38][39][40].…”

Section: Shear Strengthmentioning

confidence: 99%

Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill

Wang

Feng

et al. 2020

Advances in Materials Science and Engineering

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To reduce the amount of cement used in cemented coal gangue backfill (CCGB, a mixture of coal gangue, cement, fly ash, and water), mechanical and deformation properties of CCGB in which CSFA partially replaces the cement (0, 10, 20, 30, and 40 wt%) were studied. Compressive strength, acoustic emission during uniaxial loading, shear strength, and drying shrinkage were analysed. The compressive strength, shear strength, and drying shrinkage tests were performed at different curing times. The results showed that cemented coal gangue and corn stalk fly ash backfill (CGCAB) presented better performance, and the CGCAB with a 20% substitution rate had the best performance at day 28. Despite having the largest drying shrinkage value, 20% is the best choice for the substitution rate of CSFA. A 20% CSFA addition can enhance the bearing capacity of CGCAB and improve its failure mode, which is of great significance to support the upper overburden load and maintain the surface stability of the goaf.

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Mechanical model for failure modes of rock and soil under compression

Cited by 17 publications

References 12 publications

Special review: Mechanical investigation on failure modes of reticular porous metal foams under different loadings in engineering applications

Special review: Mechanical investigation on failure modes of reticular porous metal foams under different loadings in engineering applications

Study on Failure Modes and Energy Evolution of Coal-Rock Combination under Cyclic Loading

Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill

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