Novel PDC cutter for reinforced concrete based on linear and rotational cutting tests

Deng, Long-Chuan; Yuan, Yi-Xiang; Zhuang, Qiya; Li, Xiaozhao; Zhang, Chi; Li, Wenyu

doi:10.1016/j.tust.2022.104681

Cited by 15 publications

(3 citation statements)

References 24 publications

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“…Throughout the years, distinguished experts in the field, including Rostami (1993Rostami ( , 1997Rostami ( , 2008, Sato et al (1991), Sanio (1985) and Ozdemir et al (1978), have played pivotal roles by making noteworthy contributions. Recent research by Deng and colleagues (Deng et al, 2022a(Deng et al, , b, 2023(Deng et al, , 2024 has significantly advanced the understanding of rock-cutting processes. Their work involves the study of novel PDC cutters, full-scale mechanical rockcutting platforms and investigations into cutting forces and temperature fields.…”

Section: Introductionmentioning

confidence: 99%

“…(1978), have played pivotal roles by making noteworthy contributions. Recent research by Deng and colleagues (Deng et al ., 2022a, b, 2023, 2024) has significantly advanced the understanding of rock-cutting processes. Their work involves the study of novel PDC cutters, full-scale mechanical rock-cutting platforms and investigations into cutting forces and temperature fields.…”

Section: Introductionmentioning

confidence: 99%

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A study of rotary cutting machine (RCM) performance on Korean granite

Shin,

Farrokh,

Jung

et al. 2024

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PurposeDespite the many advantages this type of equipment offers, there are still some major drawbacks. Linear cutting machine (LCM) cannot accurately simulate the true rock-cutting process as 1. it does not account for the circular path along which tunnel boring machine (TBM) disk cutters cut the tunnel face, 2. it does not accurately model the position of a disk cutter on the cutterhead, 3. it cannot perfectly replicate the rotational speed of a TBM. To enhance the knowledge of these issues and in order to mimic the real rock-cutting process, a new lab testing equipment was developed by Hyundai Engineering and Construction.Design/methodology/approachA new testing machine called rotary cutting machine (RCM) is designed to simulate the excavation process of hard-rock TBMs and includes features such as TBM cutterhead, RPM simulation, constant normal force mode and constant penetration rate mode. Two sets of tests were conducted on Hwandeung granite using different disk cutter sizes to analyze the cutting forces in various excavation modes. The results are analyzed using statistical analysis and dimensional analysis. A new model is generated using dimensional analysis, and its results are compared against the results of actual cases.FindingsThe effectiveness of the new RCM test was demonstrated in its ability to apply various modes of excavation. Initial analysis of chip size revealed that the thickness of the chips is largely dependent on the cutter spacing. Tests with varying RPM showed that an increase in RPM results in an increase in the normal force and rolling force. The cutting coefficient (CC) demonstrated a linear correlation with penetration. The optimal specific energy is achieved at an S/p ratio of around 15. However, a slightly lower S/p ratio can also be used in the design if the cutter specifications permit. A dimensional analysis was utilized to develop a new RCM model based on the results from approximately 1200 tests. The model's applicability was demonstrated through a comparison of TBM penetration data from 26 tunnel projects globally. Results indicated that the predicted penetration rates by the RCM test model were in good agreement with actual rates for the majority of cases. However, further investigation is necessary for softer rock types, which will be conducted in the future using concrete blocks.Originality/valueThe originality of the research lies in the development of Hyundai Engineering and Construction’s advanced full-scale laboratory rotary cutting machine (RCM), which accurately replicates the excavation process of hard-rock tunnel boring machines (TBMs). The study provides valuable insights into cutting forces, chip size, specific energy, RPM and excavation modes, enhancing understanding and decision-making in hard-rock excavation processes. The research also presents a new RCM model validated against TBM penetration data, demonstrating its practical applicability and predictive accuracy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A study of rotary cutting machine (RCM) performance on Korean granite

Shin,

Farrokh,

Jung

et al. 2024

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“…Wang et al [5] established a calculation model of the interaction force and the impacts of cutting surface width. Deng et al [6] used the orthogonal test method to investigate the sensitivities of different construction parameters on cutting performance when using a single polycrystalline diamond compact (PDC) cutter. The optimal advancing speed is determined to be <1 mm/min and causes less damage to PDC tools.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Influencing Factors of Shield Cutting Existing Station Supporting Piles

Guan,

Liu,

et al. 2023

Sustainability

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Based on the shield-cutting existing station supporting piles project of Zhengzhou metro line 6, the process and mechanism of concrete in the process of pile cutting were analyzed by establishing a three-dimensional model of concrete with a cutter. The magnitude and variation rules of cutting force, penetration force, and tangential force were explored. The variation rules of cutting force with four factors of cutting speed, cutting depth, cutter width, and tool rake angle were explored. The correctness of the numerical model and results were verified by the theoretical analysis method. Finally, the significance of the influencing factors of pile cutting was studied by means of range analysis and variance analysis using the orthogonal test method, and the cutter parameters were optimized. The cutting mechanism is that the front concrete is compressed and crushed to produce a dense core. The cutting force increases rapidly to its maximum value in a short time during the cutting process. The cutting force is always larger than the penetration force and tangential force. The cutter contact force basically remains unchanged with the change in cutting speed; however, it increases with the increase in cutting depth and cutter width. The significant order of the three influencing factors is cutting depth, cutter width, and rake angle. It is suggested that the cutting depth be adjusted preferentially, followed by the cutter width. And the principle of rake angle should be considered last.

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Investigations on Cutting Force and Temperature Field of Pick Cutter Based on Single Factor and Orthogonal Test Methods

Deng

Chen

et al. 2022

Rock Mech Rock Eng

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Novel PDC cutter for reinforced concrete based on linear and rotational cutting tests

Cited by 15 publications

References 24 publications

A study of rotary cutting machine (RCM) performance on Korean granite

A study of rotary cutting machine (RCM) performance on Korean granite

Mechanical Properties and Influencing Factors of Shield Cutting Existing Station Supporting Piles

Investigations on Cutting Force and Temperature Field of Pick Cutter Based on Single Factor and Orthogonal Test Methods

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