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This research acknowledges the financial support provided by the National Natural Science Foundation of China (Grant NO. 51508556), Natural Science Foundation of Jiangxi Province (Grant NO. 20232BAB203079 and Grant NO. 20224BAB213045), China University of Mining and Technology-Beijing Inner Mongolia Research Institute Foundation (IMRI23009), Program of China Scholarship Council (Grant NO. 202406430056).
Análisis de autorías institucional
Molina-Gomez, FaustoAutor o CoautorGalindo, RubenAutor (correspondencia)Experimental analysis of the damping characteristics of longmaxi shale under graded cyclic loading with different confining pressures
Publicado en:Scientific Reports. 15 (1): 18692- - 2025-05-28 15(1), DOI: 10.1038/s41598-025-03754-6
Autores: Shu, Jiajun; Li, Tao; Li, Yue; Wu, Bingni; Deng, Zhengding; Huang, Jingzhu; Molina-Gomez, Fausto; Galindo, Ruben
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Resumen
In the process of shale gas field development, the surrounding rock has been in a three-way high-pressure stress state for a long period of time and has undergone complex cyclic loading during hydraulic fracturing and high-pressure fracturing fluid return, and its mechanical response and mechanism of action have important impacts on the stability of the reservoir. To reveal the damping characteristics of Longmaxi shale under different peripheral pressures, graded cyclic loading tests were carried out under 0 MPa, 10 MPa and 30 MPa peripheral pressures to systematically analyze the stress-strain hysteresis characteristics of the shale and the evolution of the damping ratio. The results show that the damping ratio of the Longmaxi shale shows a staged evolution with increasing stress level, which is characterized by "decreasing, stabilizing, and then slightly increasing". During cyclic loading, the axial and radial damping ratios both decreased and stabilized with increasing number of cycles. The radial damping ratio was always greater than the axial damping ratio under the same circumferential pressure conditions, and the difference was more significant under high circumferential pressure conditions. Shale exhibits typical characteristics of hysteresis and damping response evolution during dynamic loading, reflecting a progressive phase shift wherein strain increasingly lags behind stress. This phenomenon primarily arises from the accumulation of plastic deformation, the continuous propagation of microfractures, and the sequential activation of multistage energy dissipation mechanisms. The damping ratio follows a staged evolution pattern characterized by an initial decline, a period of stability, and a final surge. This trend indicates a transition in the material's response mechanism-from being dominated by structural compaction to being governed by microscopic damage processes.
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Impacto bibliométrico. Análisis de la aportación y canal de difusión
El trabajo ha sido publicado en la revista Scientific Reports debido a la progresión y el buen impacto que ha alcanzado en los últimos años, según la agencia WoS (JCR), se ha convertido en una referencia en su campo. En el año de publicación del trabajo, 2025, se encontraba en la posición 25/134, consiguiendo con ello situarse como revista Q1 (Primer Cuartil), en la categoría Multidisciplinary Sciences.
Análisis de liderazgo de los autores institucionales
Este trabajo se ha realizado con colaboración internacional, concretamente con investigadores de: China; Mongolia.
Existe un liderazgo significativo ya que algunos de los autores pertenecientes a la institución aparecen como primer o último firmante, se puede apreciar en el detalle: Primer Autor (Shu, Jiajun) y Último Autor (GALINDO AIRES, RUBEN ANGEL).
los autores responsables de establecer las labores de correspondencia han sido Shu, Jiajun y GALINDO AIRES, RUBEN ANGEL.