Article
Engineering, Multidisciplinary
Liangchi Zhang, Zhonghuai Wu, Chuhan Wu, Qi Wu
Summary: This paper presents a comprehensive review on the machining modeling of both fiber-reinforced and particulate-reinforced composites. The discussion focused on the importance of mechanics in understanding machining-induced deformation of composites. The review assessed recent advances in modeling methods and highlighted open problems and perspectives.
COMPOSITES PART B-ENGINEERING
(2022)
Review
Engineering, Mechanical
Mewael Isiet, Ilija Miskovic, Sanja Miskovic
Summary: The failure and damage of materials due to impact loading is a complex phenomenon that requires alternative methods beyond classical theories. Peridynamics, as a non-local theory using integrals instead of spatial derivatives, offers a competent tool to model and predict impact damage by effectively simulating discontinuities in materials.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Geological
Vasiliki G. Terzi, George D. Manolis
Summary: This article discusses the various factors considered in the design and construction of tunnels, including static loads, dynamic loads, seismic motions, and explosions. The finite element method and the material behavior of soil and rock continua are presented. The evolution of tunnel design, empirical methods, and code regulations are also discussed. Finally, various modeling details such as time history analyses, boundary conditions, interface conditions, discretization issues, and selection of dynamic loads are mentioned.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Martina Pressacco, Jari J. J. Kangas, Timo Saksala
Summary: This study numerically evaluates the effects of microwave heating on the mechanical properties of hard rock, showing that microwave heating can significantly reduce the compressive and tensile strength of the rock.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Marine
D. B. S. Lopes, G. Vaz, J. A. C. Falcao De Carpos, A. J. N. A. Sarmento
Summary: This work investigates theoretical and numerical methods to model oscillating hydrofoils in single and tandem arrangements. A semi-analytical model based on Theodorsen theory is presented for a hydrofoil propulsor, while a high-fidelity CFD approach is used for a more comprehensive understanding of flow dynamics. The results suggest that the semi-analytical model is suitable for design studies and the CFD model provides accurate results for complex cases.
Article
Engineering, Marine
Eric Gubesch, Nagi Abdussamie, Irene Penesis, Christopher Chin
Summary: This paper presents the results of an investigation into the generation of realistic model scale extreme waves for survivability testing of offshore structures. The objective was to accurately model maximum wave height (Hmax) and wave spectrum of a realistic focused wave group embedded in an irregular sea state. The methodologies presented in this paper are appropriate for modelling realistic extreme sea states for model scale survivability testing of offshore structures.
Article
Geochemistry & Geophysics
F. Zyserman, L. B. Monachesi, A. H. Thompson, T. D'Biassi, L. Jouniaux, P. Gauzellino
Summary: This work presents numerical modelling of electroseismic conversions with electric field sources in the atmosphere. It shows that layered structures of conductivity anomalies can generate rotated electric fields at reservoir depths. However, the high-power dipole sources limit the practical application of these methods in hydrocarbon exploration. The research explores the potential use of environmental electric fields to create useful electroseismic conversions.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jose Luis Diaz Palencia, Saeed ur Rahman, Julian Roa Gonzalez, Abraham Otero
Summary: The presented article proposes a new model for flame propagation in porous medium, using a p-Laplacian operator and a nonlinear reaction term. The analysis shows boundedness, uniqueness, stability, and asymptotic profiles of weak solutions and travelling wave solutions. The obtained upper solutions are particularly applicable for propagating flames with compactly supported initial pressure-temperature distributions.
RESULTS IN PHYSICS
(2023)
Article
Astronomy & Astrophysics
Ludovico T. Giorgini, Ulrich D. Jentschura, Enrico M. Malatesta, Giorgio Parisi, Tommaso Rizzo, Jean Zinn-Justin
Summary: In this study, we verify the obtained analytic results for the O(N)-anharmonic oscillator by numerical calculations of higher-order coefficients. We demonstrate a significant improvement in the agreement between large-order asymptotic estimates and perturbation theory when incorporating two-loop corrections to the large-order behavior.
Article
Engineering, Mechanical
Grzegorz Glodek, Ander Nazabal, Inigo Llavori, Reza Talemi
Summary: Experimental fretting fatigue lives exhibit large scatter due to microstructural inhomogeneity, affecting stress distributions and crack propagation behavior. This research uses Voronoi tessellation and numerical modeling to study and recreate the observed scatter. Results show that microstructural inhomogeneity significantly impacts stress distributions and predicts lifetimes matching experimental data, proposing a design curve for the material. Additionally, a crack path prediction approach captures variance in crack paths caused by microstructural inhomogeneity, correlating well with reference experimental results.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Biomedical
Alexandre Presas, David Valentin, Joseph Deering, Marian Kampschulte, Bosco Yu, Kathryn Grandfield, Elisa Mele, Christoph Biehl, Gabriele A. Krombach, Christian Heiss, Wolfram A. Bosbach
Summary: The study established a bovine vibration model and animal model replacements to reduce the number of necessary biological samples. Future work aims to adapt the results to human anatomy to influence bone pathologies and functionality.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Computer Science, Interdisciplinary Applications
Harnoor Saini, Oliver Roehrle
Summary: This article presents an open-access, characterised constitutive relation for 3D musculotendon models, providing a plug and play template for neuro-musculoskeletal finite element modelling.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Engineering, Manufacturing
Drew E. Sommer, D. Thomson, O. Falco, G. Quino, H. Cui, N. Petrinic
Summary: This study investigates the impact response of angle-ply carbon fibre reinforced polymer (CFRP) crush tubes using experimental testing and numerical simulations. The results show that interlaminar friction between delaminated plies plays a significant role in energy dissipation.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Review
Engineering, Chemical
Jose Jaime Ruz, Oscar Malvar, Eduardo Gil-Santos, Daniel Ramos, Montserrat Calleja, Javier Tamayo
Summary: Nanomechanical sensors have been widely used in various research fields, from fundamental physics to clinical diagnosis, and have rapidly evolved towards more sensitive devices in biological applications. The development of theoretical models has enabled researchers to access more precise information about biological entities and processes, essential for interpreting sensor signals and optimizing designs.
Article
Materials Science, Ceramics
Farid Asadi, Damien Andre, Sacha Emam, Pascal Doumalin, Marc Huger
Summary: In the steelmaking industry, the refractory ceramics used in ladles are found to have improved thermal shock resistance when pre-existing microcracks are present. The Discrete Element Method (DEM) is a suitable numerical approach for modeling the quasi-brittle behavior of these ceramics with microcracks. By introducing initial well-distributed damages following a Weibull distribution, the study aims to investigate the effect of microcracks on the quasi-brittle behavior of a numerical sample under uniaxial and cyclic tensile tests. Ultimately, a quantitative DEM model for simulating such a complex behavior is proposed.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Geochemistry & Geophysics
Junle Jiang, Brittany A. Erickson, Valere R. Lambert, Jean-Paul Ampuero, Ryosuke Ando, Sylvain D. Barbot, Camilla Cattania, Luca Dal Zilio, Benchun Duan, Eric M. Dunham, Alice-Agnes Gabriel, Nadia Lapusta, Duo Li, Meng Li, Dunyu Liu, Yajing Liu, So Ozawa, Casper Pranger, Ylona van Dinther
Summary: Dynamic modeling of earthquake and aseismic slip sequences (SEAS) provides a framework for connecting and predicting geophysical observations. In this study, we develop two benchmarks for 3D SEAS problems to compare and verify numerical codes. Our findings show good agreement among simulated outputs, but discrepancies in rupture fronts of the initial event are influenced by various factors. The recurrence intervals and nucleation phase of later earthquakes are particularly sensitive to numerical resolution and domain size.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Zeyu Jin, Yuri Fialko, Alexander Zubovich, Tilo Schone
Summary: The 2015 M7.2 Sarez earthquake occurred at the north-west margin of the Tibetan Plateau. The earthquake ruptured a sub-vertical fault producing a maximum surface offset of 3-4 m. Postseismic displacements were observed predominantly on the west side of the fault, with a rate of 20-30 mm/yr. The study suggests that the near-field postseismic displacements are best explained by shallow afterslip driven by the coseismic stress changes. The data also suggest that a pair of M6+ events within 100 km of the 2015 mainshock may have experienced delayed dynamic triggering or no relation to the mainshock.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Pengcheng Shi, Meng Wei, Sylvain Barbot
Summary: Earthquake clustering can be promoted by viscoelastic stress transfer, which is still poorly understood. This study builds a numerical model to investigate the synchronization of earthquakes and finds that viscoelastic stress transfer can promote synchronization. The findings suggest that earthquake synchronization may also occur in other tectonic and structural settings.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Brittany A. Erickson, Junle Jiang, Valere Lambert, Sylvain D. Barbot, Mohamed Abdelmeguid, Martin Almquist, Jean-Paul Ampuero, Ryosuke Ando, Camilla Cattania, Alexandre Chen, Luca Dal Zilio, Shuai Deng, Eric M. Dunham, Ahmed E. Elbanna, Alice-Agnes Gabriel, Tobias W. Harvey, Yihe Huang, Yoshihiro Kaneko, Jeremy E. Kozdon, Nadia Lapusta, Duo Li, Meng Li, Chao Liang, Yajing Liu, So Ozawa, Andrea Perez-Silva, Casper Pranger, Paul Segall, Yudong Sun, Prithvi Thakur, Carsten Uphoff, Ylona van Dinther, Yuyun Yang
Summary: Numerical modeling of earthquake dynamics requires credible and reproducible model results. The SEAS initiative aims to facilitate code comparisons and advance physics-based earthquake models. New benchmark problems have been used to explore physical ingredients and numerical considerations in earthquake modeling.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2023)
Article
Geochemistry & Geophysics
Binhao Wang, Sylvain Barbot
Summary: The evolution of frictional resistance on a fault affects the characteristics of seismic ruptures. The isothermal rate-and state-dependent friction framework can explain a wide range of rupture styles. However, the impact of temperature-dependent friction on rupture patterns remains largely unknown.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Muhammad Tahir Javed, Sylvain Barbot, Farhan Javed, Aamir Ali, Carla Braitenberg
Summary: This study uses radar interferometry to analyze the deformation associated with the 2015 Dajal blind earthquake at the eastern boundary of the Sulaiman Fold Thrust (SFT) in Central Pakistan. The results show that the earthquake ruptured the Base of Boundary Thrust and caused folding, located approximately 30 km away from the nearest surface exposure.
GEOPHYSICAL RESEARCH LETTERS
(2022)
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
Multidisciplinary Sciences
Ryley G. G. Hill, Matthew Weingarten, Thomas K. K. Rockwell, Yuri Fialko
Summary: Hydrologic loads can induce seismicity in the Earth's crust. New geologic and paleoseismic data show that past major earthquakes on the southern San Andreas Fault likely occurred during high water levels of an ancient lake. Similar relationships between hydrologic loading and seismic activity may exist in other regions.
Article
Geosciences, Multidisciplinary
Xinyu Luo, Wenyuan Fan, Yuri Fialko
Summary: Landslides are a significant hazard in areas with steep topography and abundant precipitation, and their detection and characterization in remote areas can be challenging. In this study, a semiautomated workflow using seismic and geodetic observations is developed to improve the detection and characterization of landslides in Alaska. The combination of seismic and geodetic observations provides new insights into the dynamics of landslides.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Environmental Sciences
Lifeng Wang, Sylvain Barbot
Summary: By using extensive seismic observations, we can understand the deformation processes caused by the collision between India and Eurasia in the Himalayan region. However, the deformation processes within the lithosphere on the Tibetan Plateau are still unclear and lack a comprehensive view. Our study reveals that the motion of the diffuse plate boundary involves continental underthrusting underneath the central Himalayas and delamination rollback underneath the western syntaxis. The rise of the Tibetan Plateau is achieved through crustal shortening at its southern and northwestern margins, while the subsidence of Central Tibet is associated with lateral extrusion and lithospheric thinning caused by the downwelling current from the Indian and Asian collisions.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Fengming Shen, Lifeng Wang, Sylvain Barbot, Jiahong Xu
Summary: North China, one of the most populated regions in the world, is exposed to elevated seismic hazards. This study constructed a kinematic model using geodetic data to reveal the connection between the North China Block and its neighboring blocks. The results indicate that the North China Block serves as a mechanical bridge accommodating the relative motion of surrounding tectonic units. Additionally, internal strain within the North China Block caused by Pacific subduction, Tibetan plateau extrusion, and Ryukyu trench retreat leads to frequent earthquakes.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Judith Gauriau, Sylvain Barbot, James F. Dolan
Summary: Long paleoseismic records suggest complex earthquake recurrence patterns on mature faults, challenging simple slip-or time-predictable models. However, the relatively small variability in earthquake recurrence times is often quasi-periodic, implying regularity in mechanics. By simulating the Hokuri Creek paleoearthquake record, a physical model reproduces the observed periodic and aperiodic earthquake behavior, suggesting that complex models can explain earthquake recurrence on the Alpine fault.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Zeyu Jin, Yuri Fialko, Hongfeng Yang, Yu Li
Summary: Using Sentinel-1 and ALOS-2 InSAR, as well as GNSS data, we investigated the mechanisms of coseismic and postseismic deformation during the 2021 M7.4 Maduo (China) earthquake. The results show that shallow afterslip and velocity-strengthening friction in the top 2-3 km of the upper crust are not sufficient to compensate for the coseismic slip deficit, indicating substantial off-fault yielding.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Ellis J. Vavra, Hongrui Qiu, Benxin Chi, Pieter-Ewald Share, Amir Allam, Matthias Morzfeld, Frank Vernon, Yehuda Ben-Zion, Yuri Fialko
Summary: The configuration of the Southern San Andreas Fault at seismogenic depths in the Coachella Valley has been a mystery. By analyzing space geodetic and seismic observations, it has been revealed that the straight southernmost section of the fault is dipping to the northeast, connecting with clusters of seismic activity. This dipping fault geometry has significant implications for fault slip rate, ground shaking intensity, and fault strength.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Sylvain Barbot
Summary: Establishing a constitutive law for fault friction is crucial for understanding fault behavior, but the complex frictional behavior of natural and synthetic gouges is difficult to explain. This study presents a constitutive framework that explains the rate, state, and temperature dependence of fault friction, and calibrates the model using laboratory data.