Article
Geochemistry & Geophysics
Jianye Chen, Andre R. R. Niemeijer, Christopher J. J. Spiers
Summary: Insufficient physical knowledge of fault behavior hampers earthquake simulation and hazard prediction. Laboratory studies suggest that earthquake rupture on carbonate faults can be explained by a transition from high to low friction, known as rapid dynamic weakening. Frictional heating resulting in deformation by grain boundary sliding is one explanation for this weakening. In this study, a microphysically based model was used to simulate seismic slip in laboratory carbonate faults, taking into account grain size evolution and deformation mechanisms.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Automation & Control Systems
Hae Yeon Park, Jung Hoon Kim, Ko Yamamoto
Summary: This article proposes a new stability criterion for biped walking systems on the linear inverted pendulum model, and introduces a norm-based criterion and related control approaches. The research shows that the stability regions can be explicitly obtained through only finite numbers of computations.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2022)
Review
Crystallography
Yan Huang, Jun Jiang
Summary: A von Mises criterion states that five independent slip systems are required for polycrystals to deform uniformly and without failure. However, this criterion has fundamental flaws as there is no evidence to support the simultaneous operation of five independent slip systems. This paper reexamines the von Mises criterion and the Taylor model, and addresses the fundamental issues related to the requirement of independent slip systems and the selection of active slip systems.
Article
Multidisciplinary Sciences
Rongwei Wen, Zheng Wang, Juan Yi, Yong Hu
Summary: Researchers have discovered that the penetration mechanism of the parasitic female Megarhyssa could be applied to artificial slender elements, as the ovipositor of Megarhyssa is capable of withstanding larger forces under a specific structural arrangement. This finding is important for understanding the high efficiency of insect probes and inspiring more efficient and safer engineering designs.
Article
Geochemistry & Geophysics
Matt J. Ikari, Philipp Haberkorn
Summary: Frictional slip instability, which results in intermittent stick-slip behavior, is influenced by the frictional properties of the sliding area and the stiffness of the surrounding material. By directly measuring the shear loading stiffness of five direct-shear apparatuses under various conditions, it was found that shear stiffness generally increases with increasing normal and shear stresses, although the values and their dependency on stress vary among the apparatuses.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Engineering, Geological
Feili Wang, Kaiwen Xia, Wei Yao, Shuhong Wang, Chonglang Wang, Zhanguo Xiu
Summary: This study presents an experimental method to simulate slip shear failure along rock discontinuities, conducted by dynamic direct shear experiments using a dynamic shear apparatus combined with a high-speed digital camera. The effects of shear velocity and normal stress on rough rock discontinuities are analyzed, revealing that slip rate is linearly proportional to shear velocity and decreases with increasing normal stress. A dynamic failure criterion is developed considering both surface roughness and dynamic loading, providing a good prediction of the experimental data on the dynamic shear process of rock discontinuities.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Wenming Sun, Yingchun Li, Xiaotian Wu, Chun'an Tang
Summary: In this study, the stability and instability transition mechanism of faults were investigated through experiments. The results show that the shear stiffness change during fault slip undergoes four stages, with the last two stages leading to unstable slip. It is also found that the increase in normal stress and the decrease in fault roughness accelerate the shear stiffness change process.
APPLIED SCIENCES-BASEL
(2022)
Article
Computer Science, Interdisciplinary Applications
Anita Gjesteland, Magnus Svard
Summary: This article focuses on the compressible Navier-Stokes equations under the no-slip adiabatic wall boundary conditions. A low-order summation-by-parts scheme is proposed and its linear stability and entropy stability are proved through the complete linearisation procedure. A linearly stable third-order scheme with the same boundary conditions is also introduced, but its nonlinear stability is not provable. Simulations demonstrate the robustness of both boundary treatment schemes.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Mechanical
N. N. Hieu, P. N. Chung
Summary: In this paper, the authors investigate the stability and stick-slip motion of a friction-induced vibrating system placed on a belt moving at constant velocity using a two-state model with consideration of dwell-time effect. The study finds that the influence of dwell-time on system responses is significant in the near-zero velocity range. The authors also demonstrate a positive shift in the direction of increase of belt velocity for the stable zone of the equilibrium position compared with the stable zone obtained from the LuGre model.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
S. H. Li, X. H. Luo, L. Z. Wu
Summary: This study develops a novel mathematical model and an improved whale optimization algorithm for locating critical slip surfaces of soil slopes. The research findings indicate that IWOA algorithm outperforms other algorithms in terms of performance and has the same time computational complexity as WOA.
ADVANCES IN ENGINEERING SOFTWARE
(2021)
Article
Mechanics
C. Thomas
Summary: The study investigates the effects of velocity skewness on oscillating Stokes layer, showing that velocity skewness has a stabilizing effect and increases the critical Reynolds number for linear instability. During disturbance development, the direction in which the wall velocity achieves maximum absolute value plays a crucial role.
Article
Mechanics
Jihui Ou, Jie Chen
Summary: This study systematically investigates the supersonic boundary-layer modal stability of a slightly rarefied gas, considering the effects of velocity slip and temperature jump. The results show that velocity slip stabilizes second-mode disturbances but destabilizes first-mode perturbations, while temperature jump enhances second-mode instability but has little effect on the first mode. The presence of both velocity slip and temperature jump leads to increased destabilization of the first mode and competitive effects on the second mode. Velocity slip delays neutral stability curves for higher modes and synchronization between fast and slow modes downstream, regardless of wall cooling.
Article
Physics, Fluids & Plasmas
I. Rubinstein, B. Zaltzman
Summary: This study analyzes the effects of the fine structure of the electric double layer and the electrode reaction rate on the wavelength selection of the growing perturbation mode in morphological instability during cathodic electrodeposition. The results show that the fine structure of the electric double layer combined with a finite electrode reaction rate regularizes the short-wave singularity in morphological instability. The fluid flow induced by the motion of the solid/liquid interface has negligible effect on morphological instability, while the emerging electroconvective flow has a major effect.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Acoustics
Fabrizio Defant, Paolo Albertelli
Summary: This research focuses on estimating the cutting stability of systems with periodically modulated stiffness by utilizing the innovative Harmonic Solution (HS) and its zero-order approximation. The HS outperforms the semi-discretization method in terms of speed and accuracy, providing reliable stability maps in a matter of seconds to minutes.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Thermodynamics
M. K. Nayak, S. Shaw, Hassan Waqas, O. D. Makinde, Metib Alghamdi, Taseer Muhammad
Summary: This study discusses a comparative study on the three-dimensional Casson nanofluid with nonlinear radiative MHD flow and heat transfer aspects between two parallel stretching/shrinking surfaces. Mathematical models for momentum and temperature are established with nanoparticles distributed in Pure Water, and models like Maxwell-Garnett and Patel are used for thermal conductivity augmentation. Different parameters have varied effects on the heat transfer rate.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Ken-ichi Hirauchi, Yuzuru Yamamoto, Sabine A. M. den Hartog, Andre R. Niemeijer
EARTH AND PLANETARY SCIENCE LETTERS
(2020)
Article
Geochemistry & Geophysics
Jianye Chen, Martijn P. A. van den Ende, Andre R. Niemeijer
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geochemistry & Geophysics
Qingbao Duan, Jianye Chen, Xiaosong Yang
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geochemistry & Geophysics
Luuk B. Hunfeld, Jianye Chen, Sander Hol, Andre R. Niemeijer, Christopher J. Spiers
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geochemistry & Geophysics
M. P. A. van den Ende, J. Chen, A. R. Niemeijer, J. -P. Ampuero
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Review
Geochemistry & Geophysics
Tao Yang, Yu-Min Chou, Eric C. Ferre, Mark J. Dekkers, Jianye Chen, En-Chao Yeh, Wataru Tanikawa
REVIEWS OF GEOPHYSICS
(2020)
Article
Geochemistry & Geophysics
Jianye Chen, B. A. Verberne, A. R. Niemeijer
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geochemistry & Geophysics
Jianye Chen, A. R. Niemeijer, Christopher J. Spiers
Summary: The study extends the frictional behavior model of seismogenic ruptures on faults in carbonate terrains to cover a full spectrum of slip velocities, from low to high speeds, predicting a continuous transition in dominant deformation mechanisms. Based on realistic fault structure, measurable microstructural state variables, and established deformation mechanisms, the model may offer an improved basis for extrapolating lab-derived friction data to natural fault conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Luuk B. Hunfeld, Jianye Chen, Andre R. Niemeijer, Shengli Ma, Christopher J. Spiers
Summary: Experimental research shows that rock materials exhibit dynamic weakening of 22%-81% under high velocities and large displacements, depending on normal stress and soil composition. This weakening may be achieved through thermal pressurization, and similar effects play a key role in induced seismic slip in reservoir systems like Groningen.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Peter M. Schutjens, Christopher J. Spiers, Andre Rik Niemeijer
Summary: Intergranular pressure solution plays a crucial role in diagenesis, fault sealing, and healing processes. Experimental observations on quartz aggregates under varying conditions show that different microstructural features are formed based on crystal orientation and stress-induced quartz dissolution kinetics. Further investigation is needed to analyze the mechanism of deformation by pressure solution and the impact of crystallographic control on its kinetics in quartz-rich sands and sandstones.
SCIENTIFIC REPORTS
(2021)
Article
Geochemistry & Geophysics
Li-Wei Kuo, Chien-Cheng Hung, Haibing Li, Stefano Aretusini, Jianye Chen, Giulio Di Toro, Elena Spagnuolo, Fabio Di Felice, Huan Wang, Jialiang Si, Hwo-Shuenn Sheu
Summary: The 2008 Wenchuan earthquake caused surface ruptures along the Longmenshan fault belt, with the Yingxiu-Beichuan fault and the Guanxian-Anxian faults being the most affected. Frictional experiments were conducted on the gouge materials from the Guanxian-Anxian faults, revealing that wet gouges have lower friction coefficients compared to those under room humidity conditions. Additionally, the gouges exhibited enhanced velocity-strengthening behavior at intermediate velocities, indicating a potential barrier to slip acceleration during fault propagation.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Jianye Chen
Summary: In this study, the slip stability of a fluid-infiltrated fault is analyzed using a microphysical friction model. The results show the possibility of four different modes of slow slips without invoking inertia, suggesting that the microphysical model is favorable for generating slow slips.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Jianye Chen, Andre R. R. Niemeijer, Christopher J. J. Spiers
Summary: Insufficient physical knowledge of fault behavior hampers earthquake simulation and hazard prediction. Laboratory studies suggest that earthquake rupture on carbonate faults can be explained by a transition from high to low friction, known as rapid dynamic weakening. Frictional heating resulting in deformation by grain boundary sliding is one explanation for this weakening. In this study, a microphysically based model was used to simulate seismic slip in laboratory carbonate faults, taking into account grain size evolution and deformation mechanisms.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Jianye Chen, Luuk B. Hunfeld, Andre R. Niemeijer, Christopher J. Spiers
Summary: High-velocity friction experiments on simulated fault gouges sheared at high normal stress and to low displacement were performed, revealing the relationship between constitutive parameters and normal stress, providing important constraints for numerical modeling of induced rupture propagation. The experiments also found that different rock types in the Groningen field exhibit varying levels of resistance to rupture and proposed a micrometer-scale fault weakening mechanism.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Jinyu Chen, Jianye Chen, Lu Yao, Xi Ma
Summary: This study investigated the effects of shear deformation on the friction and electrical conductivity of synthetic quartz-graphite mixtures. The results showed that specimens with higher graphite content exhibited higher electrical conductivity. Mixtures with lower graphite content (as low as 3.4% by volume) may cause high conductivity anomalies in natural shear zones.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
