Peridynamic Simulation to Fracture Mechanism of CBN Grain in the Honing Wheel Dressing Process.
Peridynamic Simulation to Fracture Mechanism of CBN Grain in the Honing Wheel Dressing Process.
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珩磨轮修整过程中CBN晶粒断裂机理的近场动力学模拟
DOI：
10.3390/mi12101186
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发表时间：
2021-09-29
期刊：
影响因子：
3.4
通讯作者：
Liu L
中科院分区：
文献类型：
--
作者：
Wang F;Chen Y;Gao Y;Liang Y;Su J;Liu L
对CBN珩磨轮进行定期修整是保证其在珩磨过程中保持刃口锋利和几何形状正确的有效方法。本研究旨在了解CBN单晶粒在珩磨轮修整过程中的断裂机理。将珩磨轮修整过程简化为砂轮修整过程，建立了考虑结合剂旋转效应的基于结合剂的周动力学方法，研究了CBN晶粒在此过程中的渐进断裂演化、应力特征和断裂模式。结果表明，CBN晶粒的断裂演化主要经历了弹性变形、损伤萌生、裂纹形成和宏观断裂四个阶段。此外，裂缝的起裂和扩展主要由拉应力和剪切应力决定，拉应力导致I型断裂，剪切应力导致II型断裂。I型断裂的扩展是稳定的，II型断裂的扩展是不稳定的。结果表明，在预测CBN晶粒在珩磨砂轮修整过程中的断裂机制方面，周动力学方法具有很大的潜力。
Regularly dressing of CBN honing wheel is an effective way to keep its sharpness and correct geometry during honing process. This study aims to understand the fracture mechanism of single CBN grain in the dressing process of honing wheel. The honing wheel dressing process was simplified into the dressing process of grinding wheel, and the bond-based Peridynamic method considering bond rotation effect was developed to investigate the progressive fracture evolution, stress characteristics, and fracture modes of CBN grains in this process. It was found that fracture evolution of CBN grains mainly underwent four stages: elastic deformation, damage initiation, crack formation, and macro fracture. In addition, the fracture initiation and propagation were mainly determined by the tensile and shear stress, where the former led to mode I fractures and the latter led to mode II fractures. The propagation of mode I fractures was stable while the propagation of mode II fracture was unstable. The results show that the Peridynamic approach has great potential to predict the fracture mechanism of CBN grain in the dressing process of honing and grinding wheels.
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影响因子：
5.4
作者：
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DOI：
10.1016/j.precisioneng.2017.12.001
发表时间：
2018-04-01
影响因子：
3.6
作者：
Mao, Cong;Lu, Ji;Bi, Zhuming
通讯作者：
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