Study on Determination Method of Rock Tensile Modulus of Brazilian Disc Splitting Test Based on Digital Speckle Correlation Method (DSCM)

Zhao, Tianfeng; Zhang, Wei; Xing, Minglu; Qiu, Yue; Yao, Jinpeng

doi:10.1007/s13369-021-06038-z

Cited by 8 publications

(1 citation statement)

References 36 publications

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“…The Brazilian disc is the most widely used approach to test the tensile strength σ t of rocks [8][9][10], and was first used by Guo et al in testing the open fracture toughness of rocks [11]. The difference between this approach and other fracture tests is that it is unnecessary to introduce the crack or the pre-opened groove in the test piece [12]. Nevertheless, due to the high compressive stress generated between the indenter and the specimen, the rock may yield and fracture near the loading point, which is inconsistent with the test principle [13].…”

Section: Introductionmentioning

confidence: 99%

Calculation Derivation and Test Verification of Indirect Tensile Strength of Asphalt Pavement Interlayers at Low Temperatures

Zhang

Fang

et al. 2021

Materials

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When the direct tensile test is adopted to determine the interlayer tensile strength of the asphalt pavements, specimen separation or internal cracking often occurs at the bonding area of the loading head, rather than at the interlaminar bonding interface. In view of the tedious and discrete data of the direct tensile test, this paper attempts to introduce an indirect tensile test to determine the interlayer bond strength of asphalt pavement to solve this problem. However, the indirect tensile test method of a binder lacks the corresponding mechanical theory. This paper deduces the calculation formula of the indirect tensile strength of a binder based on elastic theory. A mechanical model of the test was established with the finite element method. In accordance with the two-dimensional elastic theory and the Flamant solution, an analytical solution of tensile stress in the indirect tensile test is proposed through the stress superposition. On this basis, the calculation formula for the indirect tensile strength of the interlaminar bonding is derived according to Tresca’s law. A low-temperature indirect tensile test was designed and conducted to verify the correctness of the formula. By comparing the results of the indirect tensile test and direct tensile test, it is found that the interlaminar strength of the mixture measured by them is similar, and the dispersion of indirect tensile test results is small. The results show that the indirect tensile test can replace the direct tensile test to evaluate the interlaminar tensile strength.

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Section: Introductionmentioning

confidence: 99%

Calculation Derivation and Test Verification of Indirect Tensile Strength of Asphalt Pavement Interlayers at Low Temperatures

Zhang

Fang

et al. 2021

Materials

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Gray Characteristics Analysis of Strain Field of Coal and Rock Bodies Around Boreholes During Progressive Damage Based on Digital Image

Zhang

et al. 2023

Rock Mech Rock Eng

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Investigation of Phyllite-based Brazilian tests and fracture failure patterns via AE and PFC3D

Bai,

He,

et al. 2024

Bull Eng Geol Environ

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Study on Determination Method of Rock Tensile Modulus of Brazilian Disc Splitting Test Based on Digital Speckle Correlation Method (DSCM)

Cited by 8 publications

References 36 publications

Calculation Derivation and Test Verification of Indirect Tensile Strength of Asphalt Pavement Interlayers at Low Temperatures

Calculation Derivation and Test Verification of Indirect Tensile Strength of Asphalt Pavement Interlayers at Low Temperatures

Gray Characteristics Analysis of Strain Field of Coal and Rock Bodies Around Boreholes During Progressive Damage Based on Digital Image

Investigation of Phyllite-based Brazilian tests and fracture failure patterns via AE and PFC3D

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