Experimental and numerical study of the dynamic crack propagation behavior of mortar-granite specimens with different inclination interfaces

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2024-12-18 DOI:10.1016/j.tafmec.2024.104831

Hao Qiu , Rongyuan Chen , Yichao Wang , Ruifeng Liu , Dade Lai , Feiyu Liao , Yisheng Fang , Fei Wang

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引用次数: 0

Abstract

An in-depth investigation into the dynamic fracture behavior at the interface between high-strength mortar and rock was performed in this study. Utilizing a side material cleavage triangle (SMCT) configuration, this research integrated the experimental–numerical method, and crack propagation gauge (CPG) to explore the effects of varying loading speeds, interfacial inclination angles, and high-strength mortar strength on interfacial crack propagation behavior. The microstructure and thickness of the interfacial zone were analyzed. Additionally, Python scripting was employed to enable the batch embedding of cohesive elements into ABAQUS models. The results indicated that with an increase in high-strength mortar strength from 80 MPa to 100 MPa, there was a significant decrease in the thickness of the interfacial transition zone. In addition, as the interfacial inclination angle of the specimens increased from 90° to 106°, the average fracture toughness and energy in the high-strength mortar region increased by 16 % and 44 %, respectively, while the granite region increased by 15 % and 25 %, respectively. In the models, where cohesive elements were systematically embedded in batches, the crack propagation paths were found to align closely with the test results. During crack extension, the tensile stress at the crack tip was observed to be significantly greater than the shear stress.

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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.