Macro-micro analysis of mechanical properties of high-strength anchor cable steel under static and dynamic loading

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-06-10 DOI:10.1016/j.matlet.2025.138906

Junchen Li , Guoli Zu , Heng Zhang , Zhuoyue Sun , Sifeng He , Penghe Zhou

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Abstract

To reveal the static and dynamic fracture mechanisms of high-strength anchor cables commonly used in rockburst-prone roadways, this study conducted mechanical performance tests on three types of coal mine anchor cables using a computer-controlled electro-hydraulic servo testing machine and a self-developed drop hammer impact test apparatus. Scanning electron microscopy (SEM) analysis of fracture surfaces under static and dynamic loading revealed a transition in fracture mechanisms under high strain rates. Test results showed: Under high-speed impact, fractures occurred more rapidly, with significantly reduced plastic cracking and increased brittle failure. Under high-speed impact, the fracture of anchor cables occurs more rapidly, with an average reduction in elongation after fracture exceeding 40%. Key factors influenced dynamic mechanical performance included static load-bearing capacity, ductility, and brittleness. The findings provided valuable insights for the design and protection of anchor cables in rockburst-prone roadways.

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静、动荷载作用下高强锚索钢力学性能的宏微观分析

为揭示易冲击地压巷道常用高强锚索的静、动断裂机理，本研究利用计算机控制的电液伺服试验机和自行研制的落锤冲击试验装置对三种煤矿锚索进行了力学性能试验。静态和动态载荷下断口的扫描电镜（SEM）分析揭示了高应变率下断裂机制的转变。试验结果表明：在高速冲击下，断裂发生速度加快，塑性开裂明显减少，脆性破坏增加。在高速冲击作用下，锚索断裂速度更快，断裂后伸长率平均下降幅度超过40%。影响动态力学性能的关键因素包括静承载能力、延性和脆性。研究结果为易冲击地压巷道锚索的设计和保护提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive