Waterjet Erosion Model for Rock-Like Material Considering Properties of Abrasive and Target Materials

Cha, Yohan; Oh, Taemin; Cho, Gye-Chun

doi:10.3390/app9204234

Cited by 5 publications

(1 citation statement)

References 38 publications

(66 reference statements)

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“…The eliminated target volume is represented by the relationship between the work expended by the abrasive to the final depth of the abrasive indentation owing to the material hardness (Cha et al 2019). The removed volume is proportional to the diameter ( d p ), velocity ( v t ), density ( p ), and hardness ( H p ) of the abrasive:…”

Section: Effective Erosion Kinetic Energymentioning

confidence: 99%

Performance and Reuse of Steel Shot in Abrasive Waterjet Cutting of Granite

Cha

Joo

et al. 2021

Rock Mech Rock Eng

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Steel shots are suitable for abrasive waterjet rock cutting and recycling because of the high hardness and magnetic properties of steel. This study evaluated the rock-cutting performance and recycling characteristics of steel shot waterjet. The rock-cutting responses of steel shot and garnet were compared at the same waterjet conditions. The used steel shot was collected and the particle-size changes were evaluated before reuse, and its cutting performance was re-evaluated. Overall, the steel shot waterjet yielded improvements in performance in the range of 30–50% compared with the garnet waterjet. Moreover, the recycled steel shot yielded a 50% reduction in cutting performance. Rust was observed on the surface of the used steel shot, the used steel shots were partially destroyed, and the debris on the abrasive surface needed to be removed by drying. The reusable steel shot left on the 80th sieve converged to 60% in each recycling run. The results of this study can be used to reduce the cost of abrasive waterjet and industrial waste.

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Section: Effective Erosion Kinetic Energymentioning

confidence: 99%

Performance and Reuse of Steel Shot in Abrasive Waterjet Cutting of Granite

Cha

Joo

et al. 2021

Rock Mech Rock Eng

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Semi-empirical model for abrasive particle velocity prediction in abrasive waterjet based on momentum transfer efficiency

Hwang,

Cha,

Kang

et al. 2024

Comp. Part. Mech.

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Abrasive waterjet (AWJ) is a technology that removes a target material with an abrasive accelerated by ultra-high-pressure water. Recently, its application for rock excavations in civil and geotechnical engineering has increased. AWJ excavation performance is affected by the abrasive velocity formed by momentum transfer during mixing and acceleration. The abrasive velocity varies owing to changes in the abrasive flow rate, focusing tube diameter, and focusing tube length. In this study, the momentum transfer efficiency (MTE) according to the abrasive flow rate and focusing tube geometry was investigated by a numerical analysis to better understand the multiphase flow inside the AWJ system. The MTE was defined based on the theoretical relationship between the abrasive velocity ratio and focusing tube factor, and evaluated through the empirical relationship between the water stiffness and focusing tube length. The optimal abrasive flow rate for generating efficient MTE was approximately 15 g/s, which enabled economical and effective acceleration of abrasive particles. Accordingly, a prediction model based on the derived MTE was developed for the final abrasive velocity generated at the tip of the focusing tube. Using the prediction model, it is possible to evaluate the comprehensive relationship between various AWJ parameters. Based on the prediction model, the abrasive–water flow ratio to generate the optimal abrasive velocity was 0.83. The developed prediction model provides guidelines for selecting the optimal focusing tube geometry and applying an economical abrasive flow rate when designing an AWJ system.

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The use of metaheuristic optimization algorithm in abrasive water jet machining of white marble

Kawecka

2024

AIP Conference Proceedings

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Waterjet Erosion Model for Rock-Like Material Considering Properties of Abrasive and Target Materials

Cited by 5 publications

References 38 publications

Performance and Reuse of Steel Shot in Abrasive Waterjet Cutting of Granite

Performance and Reuse of Steel Shot in Abrasive Waterjet Cutting of Granite

Semi-empirical model for abrasive particle velocity prediction in abrasive waterjet based on momentum transfer efficiency

The use of metaheuristic optimization algorithm in abrasive water jet machining of white marble

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