Article
Engineering, Multidisciplinary
Lluis Monforte, Josep Maria Carbonell, Marcos Arroyo, Antonio Gens
Summary: This article presents a novel explicit time-integration algorithm for solving the coupled hydromechanical soil mechanics problems in a pseudo-static regime. By introducing a stabilization technique and selecting appropriate parameters, the algorithm demonstrates good performance in dealing with both elastic and elasto-plastic soil behavior.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Yongfan Guo, SeonHong Na
Summary: This paper presents a novel computational framework for capturing the mineral dissolution/precipitation reactions in saturated porous media. The framework can be applied in oil recovery engineering and used to simulate production scenarios. It is also fundamental for studying creep behaviors under the coupling effects between hydro-geochemistry.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Xiaoyu Feng, Meng-Huo Chen, Yuanqing Wu, Shuyu Sun
Summary: This article proposes a fully explicit and unconditionally energy-stable scheme for volume-temperature flash calculation. By combining the dynamic model and the linear semi-implicit scheme, the moles and volume can be updated with the preservation of energy-dissipation feature at a discrete level. The scheme shows promising potential and significantly reduces the implementation burden in certain engineering scenarios.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Veerarajan Selvakumar, Shuenn-Yih Chang
Summary: Although implicit integration methods consume more computational efforts compared to explicit methods, the proposed family of SDIM with second order accuracy, unconditional stability, explicit formulation and no overshoot presents a more efficient and stable solution for general structural dynamic problems. The computational efficiency of the method allows engineers to quickly conduct accurate nonlinear analysis.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Civil
Si-Cong Xie, Chinmoy Kolay, De-Cheng Feng, James M. Ricles
Summary: This paper presents a new explicit dynamic approach to simulate extreme structural behavior. It employs the multi-support excitation pattern to apply the nodal displacement history of the problem in a dynamic way and utilizes the unconditionally stable explicit KR-alpha method to eliminate convergence issues. Three examples and a parametric study demonstrate the effectiveness and accuracy of the proposed method.
Article
Mathematics, Applied
Chun-Hua Zhang, Guang-Ze Chen, Zhi-Wei Fang, Xue-lei Lin, Hai-Wei Sun
Summary: This paper investigates the numerical solution for the evolutionary stable distribution (ESD) model, proposing a new implicit-explicit scheme to discretize the model, with theoretical proof of satisfying the property of entropy dissipation. Numerical experiments are conducted to demonstrate the accuracy and effectiveness of the scheme proposed.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2022)
Article
Materials Science, Multidisciplinary
L. J. Oestringer, C. Proppe
Summary: In this paper, influence functions for fully coupled quasi-static thermoelasticity are introduced. They provide a means to calculate displacements, stresses, and temperature distributions within a halfspace for various shaped and time-dependent heat sources or pressure distributions on the surface. The potential theory is utilized to solve the underlying equations for a mechanically or thermally loaded rectangular element on the surface. The results are validated and can be easily applied to the theory of poroelasticity, which shares the same underlying equations. Example calculations for different pressure and temperature fields are conducted, and the simulation results are discussed in comparison with the uncoupled case. Estimations are made regarding the extent to which the Gough-Joule effect and its consequences can be neglected.
MECHANICS OF MATERIALS
(2023)
Article
Geosciences, Multidisciplinary
Jose M. Bastias Espejo, Andy Wilkins, Gabriel C. Rau, Philipp Blum
Summary: The development of RHEA, an open-source application capable of including element-resolution hydro-geomechanical properties in coupled simulations, provides a valuable tool to assess challenging real-world hydro-geomechanical systems with different levels of complexity.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Engineering, Multidisciplinary
Zhijun Liu, Yimin Zhang, Yao Jiang, Han Yang, Yongtao Yang
Summary: This study proposes a symmetric weak formulation based on the modification of Nitsche's method and introduces stabilization terms for the numerical computation of poroelasticity problems using the FEM with unfitted meshes. Numerical results show that this method can effectively handle problems caused by complex geometries.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Xiaofeng Yang
Summary: This study developed a new model with accurate volume conservation and designed a highly efficient scheme for its coupling system with incompressible flow. The scheme is second-order time-accurate, fully-decoupled, and only requires solving a few linear equations with constant coefficients at each time step. Numerical simulations in 2D and 3D demonstrated the accuracy and stability of the scheme.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Mathematics, Interdisciplinary Applications
Yue Zhang, Annan Zhou, Majidreza Nazem, John Carter
Summary: This study introduces fully coupled global equations to enhance the performance of Finite Element analysis of unsaturated soils. The development of new global finite element equations provides an approximate solution to the governing equations, with a significant influence on the accuracy of numerical results for undrained footing problems by including an additional mechanical term in the flow matrix.
COMPUTATIONAL MECHANICS
(2021)
Article
Mathematics, Applied
Yasir Nawaz, Muhammad Shoaib Arif, Kamaleldin Abodayeh, Wasfi Shatanawi
Summary: The proposed scheme is an explicit, unconditionally stable method for solving time-dependent partial differential equations, applied to the COVID-19 epidemic model. It is first-order accurate in time and second-order accurate in space, providing conditions for positive solutions in the epidemic model. The stability of the scheme for general parabolic equations with source terms has been proven through von Neumann stability analysis, and consistency has been verified for the susceptible individuals category. Additionally, the convergence of the proposed scheme for the mathematical model has been discussed.
ADVANCES IN DIFFERENCE EQUATIONS
(2021)
Article
Mathematics, Applied
R. Altmann, R. Maier, B. Unger
Summary: The study demonstrates the first-order convergence of the semi-explicit Euler scheme combined with a finite element discretization in space for weakly coupled elliptic-parabolic problems. The decoupling of the system improves computational efficiency without affecting convergence rates. The convergence proof is based on interpreting the scheme as an implicit method applied to a constrained partial differential equation with a delay term.
MATHEMATICS OF COMPUTATION
(2021)
Article
Mathematics, Applied
Jinjin Yang, Shipeng Mao
Summary: An algorithm for incompressible magnetohydrodynamic (MHD) equations with fully decoupled finite element method and second order time-accuracy is proposed. The algorithm combines various techniques and has been proved to have unique solvability and unconditional stability.
APPLIED MATHEMATICS LETTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Weizhu Wang, Stefanos-Aldo Papanicolopulos
Summary: A novel fully symmetric basis is derived for solving the S4-invariant polynomial space, allowing the explicit derivation of consistency conditions for non-overdeterminedness of moment equations in fully symmetric cubature rules on the tetrahedron. Optimal and quasi-optimal rule structures are obtained by solving the corresponding linear integer programming problem, and explicit formulas to calculate the estimated lower bounds in the number of integration points are given. Furthermore, the new basis is of practical value in calculating specific cubature rules, as it enables the decomposition of moment equations into smaller subsystems to design more efficient solution methods. Several interesting new results are obtained by solving the moment equations analytically.
ENGINEERING WITH COMPUTERS
(2023)
Article
Engineering, Civil
Jin Yu, Xu Chen, Yan-yan Cai, Hong Li
KSCE JOURNAL OF CIVIL ENGINEERING
(2016)
Article
Engineering, Multidisciplinary
Xin Cui, Hong Li, Guanwen Cheng, Chunan Tang, Xin Gao
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2017)
Article
Engineering, Geological
Xu Chen, Jin Yu, Chun'an Tang, Hong Li, Shanyong Wang
ROCK MECHANICS AND ROCK ENGINEERING
(2017)
Article
Engineering, Environmental
Na Wu, Zheng-zhao Liang, Ying-chun Li, Hong Li, Wan-run Li, Mei-li Zhang
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2019)
Review
Engineering, Chemical
Hong Li, Hongyuan Tian, Ke Ma
Article
Engineering, Chemical
Wei Yu, Hong Li
Article
Engineering, Geological
Zhengzhao Liang, Na Wu, Yingchun Li, Hong Li, Wanrun Li
ROCK MECHANICS AND ROCK ENGINEERING
(2019)
Article
Geochemistry & Geophysics
Min Tang, Hong Li, Chun'an Tang
Article
Geosciences, Multidisciplinary
Zhigang Deng, Hong Li, Longjiang Wang, HongZhi Liu, Zhenwei Wang
FRONTIERS IN EARTH SCIENCE
(2019)
Article
Energy & Fuels
Jianyu Li, Hong Li, Zheming Zhu, Ye Tao, Chun'an Tang
Summary: This paper introduces the Enhanced Geothermal System based on Excavation (EGS-E) as an innovative scheme for geothermal energy extraction, and discusses the evolution of surrounding rock stress and excavation damaged zones (EDZs) during ventilation. The study shows that high temperature damage affects the mechanical parameters of granite, lateral pressure coefficient influences the fracture morphology, and ventilation has a significant effect on the scale of EDZs.
Article
Energy & Fuels
Qianqian Ma, Shuaiwu Gou, Hong Li, Zhilin Cao, Hyundon Shin
Summary: This article focuses on the impact of CO2 phase transition within the wellbore in the CO2-ECBM project. Through numerical simulation and experimental data verification, it is found that the injection temperature has a significant influence on the CO2 phase state, and different phase transition processes may occur at different temperatures. Additionally, it is predicted that supercritical CO2 might exist at the bottom of the wellbore during long-term injection.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Chemistry, Multidisciplinary
Chunyan Bao, Yong Yin, Shibin Tang, Annan Jiang, Hong Li
Summary: The study simulated the seepage characteristics of limestone under high water pressure, proposing a method to predict the formation of seepage channels using acoustic emission positioning technology. The results indicated that sudden drops in the stress-strain curve after peaking signified the formation of shear fractures and seepage paths. By combining acoustic emission technology with seepage monitoring, real-time locations and growth directions of micro ruptures were revealed, improving forecast accuracy for landslides involving low-permeability rock mass with cracks.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Fengjun Huang, Hong Li, Kun Ji, Qianqian Ma, Shuaiwu Gou
Summary: This paper proposes a new method to increase CBM production by using medium enthalpy dry rock geothermal stimulation. The system takes geothermal energy as heat supply and coalbed methane as injection source, overcoming the problems of traditional thermal injection stimulation technology and achieving better stimulation effect.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Engineering, Environmental
Longtan Shao, Haoran Wang, Hong Li, Shiyi Liu
Summary: This study extended the strength criterion for soil structure failure determination from a differential expression to an integral expression along a global consecutive slip surface. A local failure criterion describing the equilibrium state of each area of a sliding surface inside a soil mass was established. The proposed method can be applied to analyze the progressive failure process of a geotechnical structure.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Qianqian Ma, Hong Li, Kun Ji, Fengjun Huang
Summary: CO2 injection technology into coal seams enhances CH4 recovery and reduces greenhouse gas emissions. The Thermal-Hydraulic-Mechanical coupling mechanism of CO2 injection into coal seams is investigated, considering competitive adsorption, diffusion, and seepage flowing of CO2 and CH4. Numerical simulations based on the Canadian CO2-ECBM project reveal that CO2 injection significantly improves methane production. Injection pressure and temperature have an impact on CH4 production and CO2 storage, with increasing pressure increasing production but weakening injection capacity, and increasing temperature slightly decreasing production and storage.
APPLIED SCIENCES-BASEL
(2023)
Article
Computer Science, Interdisciplinary Applications
Yinghao Deng, Yang Xia, Di Wang, Yan Jin
Summary: This study investigates the mechanism of hydraulic fracture propagation in laminated shale, develops a numerical solver, and validates the effectiveness of the method through simulation experiments. The study also examines the influence of the interaction between hydraulic fractures and weak interfaces on the mechanical properties of shale.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhichao Zhang, Mingfei Feng, Guangshuo Zhou, Zhenglong Xu
Summary: A thermodynamic constitutive model for structured and destructured clays is proposed in this paper. The model includes state-dependent relations of hyperelasticity and plasticity without the concept of yielding surface. The proposed model captures the couplings between elasticity and plasticity and the effects of bonding structure.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Deze Yang, Xihua Chu
Summary: Creep and stress relaxation behaviors in granular materials are influenced by the time-dependent changes in their microstructure, with particle shape playing a significant role. However, the effects of particle shape on these behaviors are still not well understood. In this study, 3D DEM models incorporating the rate process theory and superellipsoids are used to simulate creep and stress relaxation in granular samples with different aspect ratios and blockiness. The results show that both aspect ratio and blockiness have a significant influence on creep and stress relaxation, with aspect ratio affecting creep through contact force ratio and blockiness affecting stress relaxation through variation in normal contact force anisotropy. These findings provide insights into the effects of particle shape on creep and stress relaxation in granular assemblies.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shahab Amanat, Kourosh Gholami, Reza Rafiee-Dehkharghani, Dipanshu Bansal
Summary: This paper investigates the optimal design of wave barriers using the modified non-dominated sorting genetic algorithm-II (NSGA-II) and the Bloch-Floquet theory. The aim is to find the optimal design of plane wave barriers with a wide bandgap at a low-frequency range and low construction cost. The study develops a modified NSGA-II algorithm to determine the optimal arrangement of concrete in wave barrier unit cells. The performance of the optimal barriers is examined through finite element simulation and their efficacy in attenuating plane S-waves is verified.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yanlin Su, Guoqing Cai, Fengjie Yin, Yepeng Shan, Annan Zhou
Summary: This paper presents a novel elastic-viscoplastic constitutive model that takes into account particle breakage to reproduce the time-dependent behavior of coarse-grained soil. The model integrates the Unified Hardening (UH) model, the elastic-viscoplastic (EVP) model, and the overstress theory. The relationship between particle breakage and loading rate is established, and state variables associated with the critical state of coarse-grained soil are derived to consider both time and particle breakage. A three-dimensional elastic-viscoplastic constitutive model is constructed by combining a one-dimensional viscoplastic hardening parameter with a secondary consolidation coefficient considering particle breakage. The proposed model requires 19 parameters and effectively describes the influence of time-dependency and particle breakage on the shear, dilatancy, and compression behaviors of coarse-grained soil with different confining pressures or initial void ratios. Experimental data comparisons validate the model's ability to replicate the time-dependent behavior of coarse-grained soil.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shichao Zhang, Yaqiong Wang, Qidong Gao, Xiaobo Ma, Haixiao Zhou, Zhifeng Wang
Summary: Accurately evaluating and predicting ground settlement during tunnel excavation is essential for ensuring tunnel stability. This study conducted a probabilistic analysis of ground settlement under uncertain soil properties. The results demonstrate that spatially variable soils significantly influence the ground settlement in the vertical direction.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Xu Zhang, Bin Luo, Youjun Xu, Zhiwen Yang
Summary: This paper presents an analytical solution for horizontal displacements induced by small radius curve shield tunneling. The formula is derived based on the image method and Mindlin solution, considering additional thrust, frictional resistance, ground loss, and grouting pressure. The solution is validated with on-site data, demonstrating its reliability and providing a new approach for predicting and controlling stratum horizontal displacements in curve shield tunneling. The study finds that ground loss has the most significant influence on displacements, and soil closer to the tunnel exhibits larger horizontal displacements.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jian-Hong Wan, Ali Zaoui
Summary: Ground vibrations during earthquakes can cause soil strength loss and structural damage. Rubber-soil mixtures (RSM) have shown promise in reducing residual ground deformation. This study used molecular dynamics simulations to investigate the friction behavior of the rubber-clay interface in RSM systems. The results revealed a direct correlation between normal stress and friction force, with denser soil systems exhibiting higher friction forces.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Hongying Wang, Qiang Zhang, Peinan Wu, Yanjing Li, Lijun Han, Guilei Han
Summary: In addition to the Mohr-Coulomb and Hoek-Brown criteria, other nonlinear functions are used to describe the plastic response of rock mass. This paper derived the equivalent cohesive strength, frictional angle, and dilatancy angle for nonlinear yield and plastic flow rock masses. The solution for a circular tunnel in any nonlinear yield and plastic flow rock masses was derived and verified using a numerical procedure. The analysis of strain-softening rock masses under two assumed nonlinear yield criteria was also studied.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhijun Wu, You Wu, Lei Weng, Mengyi Li, Zhiyang Wang, Zhaofei Chu
Summary: This study proposed a machine learning approach to predict the uniaxial compression strength (UCS) and elastic modulus (E) of rocks. By measuring meso-mechanical parameters and developing grain-based models, a database with 225 groups of data was established for prediction models. The optimized kernel ridge regression (KRR) and gaussian process regression (GPR) models achieved excellent performance in predicting UCS and E.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Mingjun Zhou, Zhenming Shi, Chong Peng, Ming Peng, Kahlil Fredrick E. Cui, Bo Li, Limin Zhang, Gordon G. D. Zhou
Summary: In this paper, the erosion and deposition processes during overtopping dam breaching are simulated using a novel method (ED-SPH). The proposed model is able to capture the complex behaviors of dam soil erosion, entrainment, and depositions. Soil deposition hinders particle movement and reduces water velocity at the water-soil interface.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
C. Chavez-Negrete, F. J. Dominguez-Mota, R. Roman-Gutierrez
Summary: To accurately simulate groundwater flow in porous layered media, it is important to consider all environmental factors and use a generalized finite differences scheme as a meshless method for spatial discretization. This approach ensures robustness and accuracy of the numerical solution.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shuairun Zhu, Lulu Zhang, Lizhou Wu, Lin Tan, Haolong Chen
Summary: This paper investigates the effectiveness of the cascadic multigrid method applied to the improved Picard iteration method for solving nonlinear problems in deforming variably saturated porous media. Two improved Picard iteration methods are proposed, and their effectiveness is verified through numerical examples. The results show that the improved methods have faster convergence and higher computational efficiency compared to the classical method.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yuan Cao, Yan-Guo Zhou, Kyohei Ueda, Yun-Min Chen
Summary: Investigated shear stress responses of enclosed soil in deep soil mixing (DSM) grid-improved ground, and revealed the characteristics of the waist effect and mathematical model for shear stress reduction ratio.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jinfan Chen, Zhihong Zhao, Jintong Zhang
Summary: This study develops data-driven criteria to estimate the peak shear strength (PSS) of rock fractures, considering the effects of surface roughness features. A high-quality dataset is created using particle-based discrete element method and diamond-square algorithm. Tree-based models and convolutional neural network are trained to predict the PSS of rock fractures, and their reliability is verified using experimental data.
COMPUTERS AND GEOTECHNICS
(2024)