Fracture surface morphology characteristics study of marble containing randomly distribution fracture under 3D digital reconstruction

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-02-07 DOI:10.1016/j.tafmec.2025.104870

Dan Huang , Zilong Xiao , Qingping Jin , Zheng Wu

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引用次数: 0

Abstract

Fractured rocks, common in engineering materials, are significantly influenced by fissure distribution. This paper presents a series of experiments conducted to quantitatively evaluate the fracture surface morphology of marble specimens with different fracture network angles (30°, 45°, 60°, and 75°). Subsequently, the fracture surfaces of the failed specimens were digitally reconstructed from point cloud data obtained via three-dimensional (3D) laser scanning. A high-speed camera and scanning electron microscopy (SEM) were used to observe the rupture evolution and study the fracture micromorphology, respectively. The Joint Roughness Coefficient (JRC) quantitatively evaluated the two-dimensional morphology, while Skewness (S_sk), Kurtosis (S_ku), Interface Expansion Area Ratio (S_dr), and Maximum Volume Capacity (VMF) assessed the three-dimensional morphology of the fracture surface. A comparative analysis of two-dimensional and three-dimensional fracture surface morphology was conducted. The results indicate that the roughness of tensile crack is smaller than shear crack, the fractal dimension of tensile crack is smaller than shear crack. As the dip angle of prefabricated fractures increases, the primary failure mode of marble specimens transitions from tensile to mixed tensile and shear, and finally to shear failure. The JRC value for shear fracture surfaces exceeds that for tensile failure surfaces. Regression analysis revealed a high correlation between S_dr and JRC for both two-dimensional and three-dimensional fracture surface morphologies.

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.