{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,11]],"date-time":"2026-10-11T08:46:56Z","timestamp":1791708416099,"version":"4.3.4"},"reference-count":26,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["U2468218"],"award-info":[{"award-number":["U2468218"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Science Progress"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:p>\n                    The cutter with insert teeth is a critical tool for TBM rock-breaking and has been widely applied in transportation and mining tunnel construction. The arrangement of insert teeth is a key factor influencing rock-breaking performance and load characteristics. However, conventional large-insert designs suffer from stress concentration and severe tooth failure in hard rock conditions, necessitating a new approach to tooth arrangement. To address this issue, this paper investigates the rock-breaking performance of disc cutters with miniature spherical inserts (CST). A three-dimensional numerical model for CST rock-breaking was established using the finite element method and validated against linear cutting experiments. Using this model, the influence of three insert arrangement patterns (three-row staggered, two-row symmetrical, and two-row staggered) on rock fragmentation performance was systematically analyzed, followed by a parametric study on the coupled effects of insert height (2.5\u20134 mm) and tooth count (120\u2013192). The results show that the three-row staggered arrangement achieves the largest rock-breaking volume (1721 mm\n                    <jats:sup>3<\/jats:sup>\n                    ) and the lowest vertical force (44.1 kN) among the tested configurations, while the two-row staggered arrangement exhibits the lowest specific energy (263.6 J\/mm\n                    <jats:sup>3<\/jats:sup>\n                    ) and the smallest rolling force (2.23 kN). For the granite investigated (UCS = 105.25 MPa) under the present test conditions (penetration depth of 5 mm, tooth count of 120\u2013192), the insert height of 3 mm yields the lowest specific energy. The research findings reveal the influence patterns of insert arrangement and structural parameters on rock-breaking performance, providing a theoretical basis for the structural optimization and engineering application of cutters with inserted miniature spherical teeth.\n                  <\/jats:p>","DOI":"10.1177\/00368504261492521","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T13:25:45Z","timestamp":1791465945000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Numerical investigation on rock-breaking performance and arrangement optimization of disc cutter with miniature spherical inserts"],"prefix":"10.1177","volume":"109","author":[{"given":"Shijun","family":"Chu","sequence":"first","affiliation":[{"name":"School of Minerals Processing and Bioengineering"},{"name":"Central South University"},{"name":"China No.15 Metallurgical Construction Co. Ltd"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huizhen","family":"Chai","sequence":"additional","affiliation":[{"name":"China No.15 Metallurgical Construction Co. Ltd"},{"name":"School of Resources and Safety Engineering"},{"name":"Central South University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Zhang","sequence":"additional","affiliation":[{"name":"Powder Metallurgy Research Institute of Central South University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Jiang","sequence":"additional","affiliation":[{"name":"China No.15 Metallurgical Construction Co. 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Multi-objective optimization of wear life and rock-breaking efficiency for inserted tooth disc cutter[J]. Journal of Central South University (Science and Technology) 2025; 56(3): 1102\u20131112. 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Rock fragmentation mechanism and efficiency of inserted-tooth roller cutter by rotary cutting test [J]. China Journal of Highway and Transport 2018; 31(10): 150\u2013159. (in Chinese).","journal-title":"China Journal of Highway and Transport"},{"issue":"11","key":"e_1_3_4_13_2","first-page":"4398","article-title":"Effective thrust analysis of ZX315 pick-type inserted tooth cutter for raise boring machine","volume":"21","author":"Tan H","year":"2021","unstructured":"Tan H, Jing GY, Han B. Effective thrust analysis of ZX315 pick-type inserted tooth cutter for raise boring machine [J]. Science Technology and Engineering 2021; 21(11): 4398\u20134402. (in Chinese).","journal-title":"Science Technology and Engineering"},{"issue":"6","key":"e_1_3_4_14_2","first-page":"1222","article-title":"Optimal thrust analysis of inserted tooth cutter based on characteristic chip size theory","volume":"45","author":"Tan H","year":"2023","unstructured":"Tan H. Optimal thrust analysis of inserted tooth cutter based on characteristic chip size theory [J]. Chinese Journal of Geotechnical Engineering; 2023; 45(6): 1222\u20131230. (in Chinese).","journal-title":"Chinese Journal of Geotechnical Engineering"},{"key":"e_1_3_4_15_2","first-page":"111794","article-title":"Experimental and numerical investigations on rock breaking of TBM disc cutter based on a novel platform with rotational cutting","volume":"202","author":"Deng LC","year":"2022","unstructured":"Deng LC, Zhang C, Zhuang QW, et al. Experimental and numerical investigations on rock breaking of TBM disc cutter based on a novel platform with rotational cutting [J]. 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