Computational Simulation and Experimental Analysis on Wearing Mechanisms of Gypsum and Concrete Samples in Pin‐on‐Disk ASTM Abrasion Testing

IF 3.4 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL
Jinwei Fu, Vahab Sarfarazi, Hadi Haeri, Behzad Tolaminejad, Soheil Abharian, Haleh Rasekh, Manoj Khandelwal, Mohammad Fatehi Marji
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引用次数: 0

Abstract

Mechanical excavation machines, like continuous miners and road headers, have been broadly used in tunneling and underground and surface mines. The disc cutters are seated on the different cutter heads’ to cut different parts of the tunnel face. With the increase in the cutters’ size and power, the cutting disc cutters’ capacity has been extended to cut moderate and tough rock types. This experimental and numerical research includes the application of, “Pin‐on‐Disk” ASTM abrasion testing, in which the failure mechanism of an interface between both the rock‐like samples and (WC–Co) tungsten carbide has been investigated under different confining pressures. The research aims to investigate the wear mechanism of gypsum and concrete samples. The Particle Flow Code in three dimensions (PFC3D) was used for test simulations concurrently with the experimental setup. A drilling pin with a diameter of 0.4 m was positioned above the model. The pin was inserted into the model at speeds of 0.01 mm/s at depths of 1, 3, and 5 m. A total of nine lab tests were conducted. The tensile strength of the material was 2.5 MPa. The results show that the values of volume lost for the gypsum and concrete discs were detected as a function of sliding length, fitting to non‐linear behavior. The wearing depth increased by increasing the loading force. Under constant loading force, the gypsum sample wears more than the concrete sample because gypsum is less strong than concrete. The PFC generates useful findings that experimental tests cannot provide.
针盘 ASTM 磨损试验中石膏和混凝土样品磨损机理的计算模拟与实验分析
机械挖掘机,如连续采矿机和掘进机,已广泛应用于隧道、地下和地面矿山。圆盘铣挖机安装在不同的铣挖头上,用于铣挖隧道工作面的不同部分。随着铣挖机尺寸和功率的增加,圆盘铣挖机的铣挖能力已扩展到铣挖中等和坚硬的岩石类型。这项实验和数值研究包括应用 "盘上针 "ASTM 磨损试验,研究了在不同的约束压力下,类岩石样本和(WC-Co)硬质合金之间界面的破坏机制。该研究旨在调查石膏和混凝土样品的磨损机制。在实验设置的同时,还使用了三维粒子流代码(PFC3D)进行测试模拟。直径为 0.4 米的钻针被放置在模型上方。钻针以 0.01 毫米/秒的速度插入模型,深度分别为 1 米、3 米和 5 米。材料的拉伸强度为 2.5 兆帕。结果表明,石膏和混凝土圆盘的体积损失值是滑动长度的函数,符合非线性行为。磨损深度随着加载力的增加而增加。在恒定加载力下,石膏样品的磨损程度大于混凝土样品,因为石膏的强度低于混凝土。PFC 得出了实验测试无法提供的有用结论。
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来源期刊
CiteScore
6.40
自引率
12.50%
发文量
160
审稿时长
9 months
期刊介绍: The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.
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