Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region
Scientific drilling in polar regions plays a crucial role in obtaining ice cores and using them to understand climate change and to study the dynamics of polar ice sheets and their impact on global environmental changes (sea level, ocean current cycle, atmospheric circulation, etc.). Mechanical rota...
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ftcopernicus:oai:publications.copernicus.org:egusphere116758 2024-09-15T18:11:58+00:00 Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region Lv, Xinyu Cui, Zhihao Wang, Ting Wen, Yumin Liu, An Wang, Rusheng 2024-07-24 application/pdf https://doi.org/10.5194/egusphere-2023-2985 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2985/ eng eng doi:10.5194/egusphere-2023-2985 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2985/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2023-2985 2024-07-26T00:08:26Z Scientific drilling in polar regions plays a crucial role in obtaining ice cores and using them to understand climate change and to study the dynamics of polar ice sheets and their impact on global environmental changes (sea level, ocean current cycle, atmospheric circulation, etc.). Mechanical rotary cutting is a widely used drilling method that drives the cutter to rotate to cut and drill through ice layers. It is necessary to conduct in-depth research on the brittle fracture behavior of ice and mechanical model and to analyze the factors and specific mechanisms (cutter's angle, rotation speed of the drill bit, and cutting depth) affecting cutting force for the rational design of ice core drill systems, improving the efficiency of ice core drilling and ensuring the drilling process runs smoothly. Therefore, in this paper, the process of ice cutting was observed, the fracture mechanics characteristics of the ice cutting process were analyzed, the formation process of ice chips was divided into three stages, and a mathematical model for the cutting force was established based on the observation results. The paper describes the damage conditions of ice failure and points out the factors and specific laws influencing cutting force. Furthermore, the cutting force generated under various experimental conditions was tested. Based on specified real-time variation curves of cutting force, the characteristics of cutting force were analyzed during the cutting and drilling process. Based on comparison to results of the average cutting force, the influence mechanism of various parameters acting on the cutting force was obtained. This proves the correctness of the mathematical model of the cutting force and provides a theoretical reference for the calculation of the cutting force during ice cutting and drilling in polar regions. Text ice core Copernicus Publications: E-Journals |
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Copernicus Publications: E-Journals |
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English |
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Scientific drilling in polar regions plays a crucial role in obtaining ice cores and using them to understand climate change and to study the dynamics of polar ice sheets and their impact on global environmental changes (sea level, ocean current cycle, atmospheric circulation, etc.). Mechanical rotary cutting is a widely used drilling method that drives the cutter to rotate to cut and drill through ice layers. It is necessary to conduct in-depth research on the brittle fracture behavior of ice and mechanical model and to analyze the factors and specific mechanisms (cutter's angle, rotation speed of the drill bit, and cutting depth) affecting cutting force for the rational design of ice core drill systems, improving the efficiency of ice core drilling and ensuring the drilling process runs smoothly. Therefore, in this paper, the process of ice cutting was observed, the fracture mechanics characteristics of the ice cutting process were analyzed, the formation process of ice chips was divided into three stages, and a mathematical model for the cutting force was established based on the observation results. The paper describes the damage conditions of ice failure and points out the factors and specific laws influencing cutting force. Furthermore, the cutting force generated under various experimental conditions was tested. Based on specified real-time variation curves of cutting force, the characteristics of cutting force were analyzed during the cutting and drilling process. Based on comparison to results of the average cutting force, the influence mechanism of various parameters acting on the cutting force was obtained. This proves the correctness of the mathematical model of the cutting force and provides a theoretical reference for the calculation of the cutting force during ice cutting and drilling in polar regions. |
format |
Text |
author |
Lv, Xinyu Cui, Zhihao Wang, Ting Wen, Yumin Liu, An Wang, Rusheng |
spellingShingle |
Lv, Xinyu Cui, Zhihao Wang, Ting Wen, Yumin Liu, An Wang, Rusheng Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region |
author_facet |
Lv, Xinyu Cui, Zhihao Wang, Ting Wen, Yumin Liu, An Wang, Rusheng |
author_sort |
Lv, Xinyu |
title |
Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region |
title_short |
Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region |
title_full |
Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region |
title_fullStr |
Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region |
title_full_unstemmed |
Research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region |
title_sort |
research of mechanical model based on characteristics of facture mechanics of ice cutting for scientific drilling in polar region |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-2985 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2985/ |
genre |
ice core |
genre_facet |
ice core |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-2985 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2985/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-2985 |
_version_ |
1810449558494248960 |