Study on the brittle failure of flawed concrete-sandstone based on entropy theory and AE crack classification

Deng, Xiaojiang; Shen, Mingxuan; Zhao, Yu; Bi, Jing; Wang, Chaolin; Zhang, Yongfa; Li, Yang; Ning, Lin

doi:10.1016/j.tafmec.2024.104773

Theoretical and Applied Fracture Mechanics

2025

DOI: 10.1016/j.tafmec.2024.104773

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Study on the brittle failure of flawed concrete-sandstone based on entropy theory and AE crack classification

Xiaojiang Deng,

Mingxuan Shen,

Yu Zhao

et al.

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Study on Mode I Fracture Characteristics and Fracture Surface Morphology of Concrete–Sandstone Under Different Loading Rates

Deng,

Shen,

Zhao

et al. 2024

Fatigue Fract Eng Mat Struct

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This paper studies the effect of various loading rates (0.02, 0.05, 0.5, and 1 mm/min) on the fracture characteristics of Mode I concrete–rock composites. Digital image correlation (DIC) and acoustic emission (AE) techniques are used to analyze cracked straight‐through Brazilian discs (CSTBD). Significant changes in Shannon entropy were observed before fracture failure, suggesting it as a reliable precursor indicator. The study found that as loading rates increased, the time for CSTBD to undergo plastic deformation decreased, leading to more transgranular and intergranular fractures. Surface morphology analysis revealed that fractal dimensions and surface roughness (Rrms) increased with higher loading rates. A MATLAB program, using power spectral density (PSD) to evaluate the joint roughness coefficient (JRC), demonstrated greater efficiency and accuracy compared with traditional visual assessment methods. This highlights the PSD method's superior performance in determining JRC values.

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Study on Mode I Fracture Characteristics and Fracture Surface Morphology of Concrete–Sandstone Under Different Loading Rates

Deng,

Shen,

Zhao

et al. 2024

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

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Study on the brittle failure of flawed concrete-sandstone based on entropy theory and AE crack classification

Cited by 1 publication

References 38 publications

Study on Mode I Fracture Characteristics and Fracture Surface Morphology of Concrete–Sandstone Under Different Loading Rates

Study on Mode I Fracture Characteristics and Fracture Surface Morphology of Concrete–Sandstone Under Different Loading Rates

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