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

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-12-19 DOI:10.1111/ffe.14543

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

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引用次数: 0

Abstract

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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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.