Numerical Investigation of Stress and Strain Analysis in Rock Breaking of TBM Disk Cutters

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Strength of Materials Pub Date : 2024-05-08 DOI:10.1007/s11223-024-00640-w
Y. Yang, H. Cheng, J. Fu, H. Haeri, R. Hou
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Abstract

Disk cutters, as the main component of rock fragmentation, are prone to various types of breakages during rock cutting due to the unevenness of rocks in nature, which can affect rock breakage efficiency. This study has numerically simulated stress and strain changes for different rocks under rock breaking using disk cutters. This study has used several behavioral models, including elastic- plastic constitutive, plastic-kinematic, and elastic constitutive models, to analyze stress and strain in rock breakage. The aim was to determine different rocks’ strength and deformation ability under the action of TBM disk cutters. In three simulation models, the maximum stress in the elastic model exceeded those of plastic-kinematic and elastic-plastic models by 15.5 and 8.7 times, respectively. The plastic model is very susceptible to deformation and damage. On the other hand, the elastic model requires significant stresses to produce partial strains and releases the stress faster as the disk shear continues.

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隧道掘进机圆盘铣刀破岩过程中的应力和应变分析数值研究
圆盘切割机作为岩石破碎的主要部件,由于岩石在自然界中的不均匀性,在岩石切割过程中容易出现各种破损,从而影响岩石破碎效率。本研究对使用圆盘切割机破岩时不同岩石的应力和应变变化进行了数值模拟。本研究采用了多种行为模型,包括弹塑性组成模型、塑性运动学模型和弹性组成模型,来分析岩石破碎过程中的应力和应变。目的是确定不同岩石在 TBM 圆盘铣刀作用下的强度和变形能力。在三个模拟模型中,弹性模型的最大应力分别是塑性-机械模型和弹塑性模型的 15.5 倍和 8.7 倍。塑性模型非常容易变形和损坏。另一方面,弹性模型需要很大的应力才能产生部分应变,并且随着圆盘剪切的继续,应力释放得更快。
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来源期刊
Strength of Materials
Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-
CiteScore
1.20
自引率
14.30%
发文量
89
审稿时长
6-12 weeks
期刊介绍: Strength of Materials focuses on the strength of materials and structural components subjected to different types of force and thermal loadings, the limiting strength criteria of structures, and the theory of strength of structures. Consideration is given to actual operating conditions, problems of crack resistance and theories of failure, the theory of oscillations of real mechanical systems, and calculations of the stress-strain state of structural components.
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