Article
Geochemistry & Geophysics
Sylvain Barbot
Summary: Understanding the constitutive behavior of faults is crucial in earthquake science, but a friction law applicable to the brittle crust and upper mantle at different temperatures is still missing. In this study, we investigate the effect of multiple healing mechanisms and different rock-forming minerals on the evolution of frictional resistance. The results explain the velocity- and temperature-dependence of friction for various rocks and natural fault gouges, providing insights into subcritical crack growth and inter-granular flow.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Yanbao Li, Lichun Chen, Yongkang Ran, Yuqiao Chang
Summary: Active faults with potential earthquake magnitude of 6-7 are often misidentified as non-Holocene active faults by traditional geological methods. A comparative analysis between the Dachuan-Shuangshi fault and the Beichuan-Yingxiu fault reveals significant differences in their microscopic characteristics, which can serve as auxiliary indicators for identifying minor-surface-rupture faults.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Multidisciplinary Sciences
Maartje F. Hamers, Andre R. Niemeijer, Martyn R. Drury
Summary: Two simulated gouges (pure quartz and quartz-muscovite mixture) were deformed experimentally under hydrothermal conditions. Microstructural analysis revealed quartz dissolution and precipitation in both experiments. The results indicate the importance of cathodoluminescence in analyzing experimentally deformed quartz-bearing materials and visualizing quartz precipitation.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Bo-Lang Zhang, Kai-Sheng Chen, Xing Hu, Kun Zhang
Summary: This paper proposes a variable-order fractional dynamic model for accurately describing the deformation characteristics of clay under long-term cyclic load based on fractional calculus, elastoplastic theory, and the basic element model. Through dynamic triaxial tests on Zhan Jiang clay and Tian Jin soft clay, the analysis shows that the model can properly characterize the deformation characteristics of clay under long-term cyclic loading.
APPLIED SCIENCES-BASEL
(2022)
Article
Geochemistry & Geophysics
Duyuan Xu, Zhenguo Zhang, Yunyi Qian, Houyun Yu, Xiaofei Chen
Summary: In this study, the primary characteristics of the 2020 Mw 6.0 Jiashi earthquake were explored using dynamic rupture modeling. The results were compared with InSAR data and near-source ground-motion observations, showing that the low dip angle segments acted as stress barriers in the rupture propagation. This study contributes to understanding the complexity of low dip angle listric-reverse faults.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Engineering, Mechanical
Michal Kucewicz, Pawel Baranowski, Lukasz Mazurkiewicz, Jerzy Malachowski
Summary: This paper provides a detailed comparison study of three selected material models in hydrocodes for understanding the behavior of rock under blast-and shock-induced loadings. The JH-2 model is selected based on the comparison study to simulate a representative blast in a mining face, demonstrating its efficiency in the simulation of drilling and blasting.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Editorial Material
Materials Science, Multidisciplinary
Chang-an Li, Guoliang Qin, Hao Wang, Peihao Geng
Summary: This paper conducted hot compression experiments to analyze the deformation behavior and dynamic recrystallization of FGH96 at high temperature and strain rate conditions. Two strain modified viscoplastic constitutive models were established and proven to accurately reflect the deformation behavior and suitable for numerical simulation of IFW.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Geochemistry & Geophysics
Zhi Geng, Audrey Bonnelye, Christian David, Pierre Dick, Yanfei Wang, Alexandre Schubnel
Summary: This study reveals the time-dependent creep behavior and the importance of pressure solution in the sealing mechanism of shale samples through a combination of triaxial compression creep experiments and modeled pressure solution processes in Tournemire shale. The research findings suggest that the pressure solution-induced sealing mechanism is highly active, influencing the creep failure strength and sealing capacity of dolomite-rich shales at middle-shallow depths and thus impacting reservoir fluids transfer and fault gouge strength.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
R. A. Harris, M. Barall, D. A. Lockner, D. E. Moore, D. A. Ponce, R. W. Graymer, G. Funning, C. A. Morrow, C. Kyriakopoulos, D. Eberhart-Phillips
Summary: This study used physics-based dynamic rupture modeling to numerically simulate earthquakes on the Hayward fault and its connected faults. The research found that rock properties, earthquake nucleation locations, fault geometry, and fault creep patterns are crucial factors influencing the rupture behavior.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
J. C. Lozos
Summary: This study investigates the conditions under which rupture occurs on two component faults simultaneously in an orthogonal strike-slip fault system through dynamic rupture simulations. The results show that only when slip on the first fault reduces the normal stress on the second fault, or when a stopping phase occurs due to the termination of the first fault at the cross fault, multifault ruptures occur.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jun-Quan Wang, Yong-Cheng Lin, Yu-Liang Qiu, Jiang-Shan Zhu, Xu-Hao Zhu, Yi-Wei Xiao
Summary: The deformation behavior of an Al-Cu-Mn-Fe-Zr alloy is influenced by temperature and strain rate, with the dominant mechanism being dynamic recovery to balance work hardening. Low strain rates consume more dislocations, making it difficult to trigger dynamic recrystallization, while high strain rates promote the process of dynamic recrystallization.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Geochemistry & Geophysics
Bo Li, Alice-Agnes Gabriel, Thomas Ulrich, Claudia Abril, Benedikt Halldorsson
Summary: In this study, three fault system models of varying complexity were constructed to investigate earthquake hazards in the Husavik-Flatey Fault Zone (HFFZ). By analyzing 79 dynamic rupture scenarios, it was found that fault system geometry, hypocenter location, and prestress can affect rupture cascading potential and slip distributions. The resulting simulated ground motions exhibited spatially heterogeneous near-field characteristics influenced by geometric complexities, topography, and rupture directivity. Physics-based ground motion variability varied with fault-distance and was higher for unilateral ruptures compared to bilateral ruptures. This research provides important insights into the mechanics and earthquake hazard of large strike-slip fault systems like the HFFZ.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Chemistry, Physical
Rongchuang Chen, Shiyang Zhang, Xianlong Liu, Fei Feng
Summary: The study investigated the flow behavior of 300M steel under tension through hot uniaxial tensile tests at different temperatures and strain rates. Compared to compression tests, tensile flow stress was higher and ultimate elongation of 300M steel was influenced by temperature and strain rate. A constitutive model based on the modified Arrhenius model showed good accuracy with an average deviation of 6.81 MPa.
Article
Geosciences, Multidisciplinary
Ase Hestnes, Deta Gasser, Thomas Scheiber, Joachim Jacobs, Roelant van der Lelij, Jasmin Schonenberger, Anna K. Ksienzyk
Summary: This study investigates the spatial-temporal evolution of fractures and faults in the northern section of the passive margin of Western Norway, revealing different paleostress fields and their effects on fault mineralization and formation periods.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Haiping Ma, Jiangang Feng, Qian Wang, Jing Zhao, Zhenyu Zou, Zhengyi Yuan, Minjuan Li
Summary: This study analyzes the crustal deformation and stress-strain accumulation characteristics prior to the Mw 7.3 Maduo earthquake using seismic data and GPS observations. The results indicate high stress level and significant strain energy accumulation in the epicenter area before the earthquake, suggesting a high seismic potential in the Maqin-Maqu fault segment.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)