Article
Computer Science, Software Engineering
Zachary Ferguson, Minchen Li, Teseo Schneider, Francisca Gil-Ureta, Timothy Langlois, Chenfanfu Jiang, Denis Zorin, Danny M. Kaufman, Daniele Panozzo
Summary: We have introduced the first implicit time-stepping algorithm for rigid body dynamics, with contact and friction, that ensures intersection-free configurations at every time step. Our algorithm explicitly models the curved trajectories traced by rigid bodies in collision detection and response.
ACM TRANSACTIONS ON GRAPHICS
(2021)
Article
Computer Science, Artificial Intelligence
Xihang Li, Guiqin Li, Ming Li, Kuiliang Liu, Peter Mitrouchev
Summary: A new method based on Swin transformer is proposed for reconstructing 3D human body shape from human orthogonal mask image, overcoming the limitations of reconstruction based on RGB images and naked 3D scanning. The method represents the reconstruction problem as solving regression mapping function, and innovatively represents the regression function as a piecewise function with the human body shape as the segmentation criterion.
IMAGE AND VISION COMPUTING
(2023)
Article
Automation & Control Systems
Juan Deng, Lin Wang, Zhixin Liu
Summary: This paper discusses the combination of attitude synchronization and rigid formation problem of multiple moving rigid bodies. By utilizing finite-time control and potential function techniques in the design of distributed control laws, the theoretical results on attitude synchronization, rigidity maintenance, and collision avoidance are simultaneously established. Moreover, the local asymptotic stability of rigid formations is shown to be achievable by transforming the stability of rigid formations into the stability of parameterized systems.
Article
Environmental Sciences
Changqun Zhang, Haojie Zhou, Fredrik Christiansen, Yujiang Hao, Kexiong Wang, Zhangbing Kou, Ruipeng Chen, Jie Min, Randall Davis, Ding Wang
Summary: In this study, 3D modeling techniques were used to measure the volume of marine mammals. The most accurate results were obtained using Blender 3D models, with only a 2.5% mean error compared to direct measurements. Elliptical models with 19 height and width measurements also yielded similar accuracy, while truncated models with 3 or 5 girth measurements had lower accuracy. Researchers are recommended to use digital 3D models or elliptical models with 5% increments to accurately estimate the body volumes of free-ranging marine mammals.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Xiang Wang, Zhen-Yu Yin, Dong Su, Hao Xiong, Y. T. Feng
Summary: This study introduces a novel Arcs-based discrete element method for efficient simulation of realistic granules with arbitrary convex and concave 2D particle outlines. By combining computational geometry algorithms, circle growing technique, and least squares method, the method can represent particle outlines with multi-connected arcs, facilitating efficient overlapping detection and contact resolution. The developed ArcDEM tool demonstrates powerful capabilities in numerically investigating the mechanical properties of realistic granular particles.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Environmental Sciences
Ioannis Farmakis, D. Jean Hutchinson, Nicholas Vlachopoulos, Matthew Westoby, Michael Lim
Summary: This research introduces a new approach to model rockfall susceptibility and identify potential source zones. By developing a data-driven model that assesses local slope morphological attributes, it can effectively determine where a rockfall is more likely to occur. This is a critical advance in managing transport corridors by analyzing historical event inventories and defining the probability of rockfall occurrence in a given area.
Article
Geosciences, Multidisciplinary
Shao-Zhen Duan, Guang-Li Li, Xin Yang, Xin-Rong Wei
Summary: The study aims to establish a statistical model of random rockfall-slope collision considering the movement of the impacted stones using the impulse moment theorem. The means and standard deviations of rebound velocity are calculated based on probability theory. The probability distribution functions of the horizontal and vertical distances are analyzed.
Article
Computer Science, Software Engineering
Clinton B. Morris, Morad Behandish
Summary: This paper introduces a generic method for generating a pair of geometries that are modified incrementally and simultaneously to avoid collision. The effectiveness and scalability of this method are demonstrated in both 2D and 3D by generating various collision-free shapes.
COMPUTER-AIDED DESIGN
(2022)
Article
Computer Science, Information Systems
Li Han, Jingyu Piao, Yuning Tong, Bing Yu, Pengyan Lan
Summary: The study introduces a joint convolutional neural network learning model based on informative images to enhance the discernment of features in view-based 3D shape recognition. By generating a synthetic feature vector through weighted aggregation and refinement process, the model achieved remarkable improvement in non-rigid 3D shape classification.
MULTIMEDIA TOOLS AND APPLICATIONS
(2021)
Article
Computer Science, Artificial Intelligence
Jiaqi Yang, Ke Xian, Peng Wang, Yanning Zhang
Summary: This paper provides a comprehensive evaluation of nine state-of-the-art 3D correspondence grouping methods under various application contexts and perturbations, aiming to find a more efficient and accurate way for point-to-point correspondences between 3D rigid data.
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
(2021)
Article
Computer Science, Software Engineering
Bailin Deng, Yuxin Yao, Roberto M. Dyke, Juyong Zhang
Summary: This article presents a comprehensive review of non-rigid registration methods for 3D shapes, particularly focusing on techniques related to dynamic shape acquisition and reconstruction. It covers various approaches for representing the deformation field and computing the desired deformation, including optimization-based and learning-based methods. The article also reviews benchmarks and datasets for evaluating non-rigid registration methods and discusses potential future research directions.
COMPUTER GRAPHICS FORUM
(2022)
Article
Engineering, Geological
B. Garcia, P. Villard, V. Richefeu, D. Daudon
Summary: This paper discusses the use of a 3D discrete elements model to replicate field observations for further analysis of potential rockfall hazards. Through experiments involving releasing large rock blocks and assessing parameters such as propagation distance, velocity, and energy balance, the importance of geometric features in rockfall analysis is highlighted.
ENGINEERING GEOLOGY
(2022)
Article
Computer Science, Information Systems
Feiyu Zhao, Wei Tian, Zongxiao Zhu, Sheng Lei, Delong Kong
Summary: This study focuses on digital geometry processing of hand-drawn pressure-sensitive trajectories for Web-based 3D modeling, proposing lightweight processing methods such as the ACUTS and LRPDP algorithms to simplify trajectories and reconstruct 3D stroke meshes, achieving data reduction and improved accuracy.
Article
Engineering, Mechanical
Haibo Zhang, Xiaohu Wu, Wenzhong Wang
Summary: The electrically conductive coating can effectively reduce the electrical contact resistance of sliding electrical contact. However, the wear resistance of the coated surface affects its reliability and lifetime. In this study, the electrical contact performance of an Au-coating/Cu-substrate system was evaluated. The effects of coating thickness and normal loading on the system were investigated, and two wear modes of the coated sliding electrical contact were observed.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Electrical & Electronic
Luqing Luo, Lulu Tang, Rui Liu, Xiaoli Zhang, Zhi-Xin Yang
Summary: A novel feature learning approach was proposed for non-rigid 3D shape retrieval, which captured deformation-invariant characteristics and mapped them using structured sparsity regularization, showing effectiveness and advantages over existing methods in experiments on public benchmarks.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Mechanical
Ya Yang, Jin-chun Liu, Shi-gang Yang, Qin Fang, Chao Rong, Zhan Li
Summary: Different types of architectural glass have different anti-explosion capabilities, and increasing the thickness of the structure layer improves the anti-explosion ability of different building glasses.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Civil
Ye Hu, Li Chen, Qin Fang, Xiangzhen Kong, Yanchao Shi, Jian Cui
Summary: This study proposed three different retrofitting methods using CFRP sheets to improve the anti-blast performance of current RC structures. Field tests showed that the methods enhanced the lateral resistance and local damage of RC columns to different extents. The study also identified brittle failure at column ends as a vulnerable point for axial bearing capacity, where CFRP wrapping was inconvenient. Finally, a new formula based on residual bearing capacity was proposed to quantitatively calculate the retrofitting contribution to blast resistance of RC columns.
ENGINEERING STRUCTURES
(2021)
Article
Energy & Fuels
Zhan Li, Li Chen, Haichun Yan, Qin Fang, Yadong Zhang, Hengbo Xiang, Yang Liu, Senpei Wang
Summary: This study investigated the loading characteristics of gas explosions inside a large-scale tube through experiments and numerical simulations, revealing that vents can reduce peak pressure and increase flame travel distance. It was found that peak pressure increases with concentration and reaches maximum when the gas concentration is between 7.5% to 9.5%.
Article
Engineering, Mechanical
Q. Su, H. Wu, H. S. Sun, Q. Fang
Summary: This study investigates the blast-resistant behavior of one-way simply-supported reinforced ultra-high performance concrete (UHPC) panels through field tests and numerical simulations. The superiority of UHPC as a blast-resistant material was quantitatively proved, and model parameters were calibrated for evaluation and design of UHPC structures under blast loadings. The study provides valuable data and insights for the development of blast-resistant structures using UHPC.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Shangbin Yang, Xiangzhen Kong, Hao Wu, Qin Fang, Hengbo Xiang
Summary: The modified material model for UHPCC under impact and blast loadings accurately predicted dynamic responses of structures, demonstrating its effectiveness and practicality in numerical simulations.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Yin Wang, Xiangzhen Kong, Qin Fang, Li Chen, Junyu Fan
Summary: This study focuses on physically modeling the damage mechanisms in concrete structures under blast and impact loadings, with particular consideration given to high confinement situations. By introducing a new damage model, the interactions between different damage mechanisms are successfully simulated, revealing the physical mechanisms behind the observed dynamic failures in reinforced concrete slabs subjected to explosions and projectile impacts.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
P. C. Jia, H. Wu, R. Wang, Q. Fang
Summary: The study confirmed the excellent lateral impact resistance of steel bar reinforced UHPC members, and showed that the presence of axial force can effectively enhance their impact resistance. A FE model was developed to predict the impact behavior of UHPC members.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Li Chen, Chengjun Yue, Yongkang Zhou, Jinhua Zhang, Xiquan Jiang, Qin Fang
Summary: The study conducted dynamic tensile tests on concrete to investigate its tensile properties, finding that both tensile fracture energy and tensile strength show significant strain-rate dependence. It is necessary to consider the effect of dynamic factors on the performance of concrete.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
ZhangYu Wu, JinHua Zhang, HongFa Yu, Qin Fang, Li Chen, ChengJun Yue
Summary: This study investigated the dynamic responses and damage mechanism of coral aggregate concrete in compression through experimental and numerical research. It was found that the splitting failure passing through the coral aggregate is the primary failure mode, and the failure pattern and deformation process are influenced by strain rate and concrete strength grade. The developed 3D mesoscale modelling method was proven to be reliable in simulating CAC's dynamic performances, showing great potential for future research under intense dynamic loadings.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Xieping Huang, Xiangzhen Kong, Zuyu Chen, Qin Fang
Summary: This study presents a plastic-damage model for rock-like materials, incorporating three damage mechanisms with clear physical backgrounds, particularly addressing the hydrostatic damage due to pore collapse. The model accurately captures material property degradations and prevents overestimation of material strength and modulus caused by pore collapse.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Mechanical
Y. X. Zhai, H. Wu, Q. Fang
Summary: This study investigates the impact resistance of layered composite structures with high hardness and light weight against high-speed projectiles. Through experiments and numerical simulations, SiC ceramics and armor steel/ceramic/UHPC composite structures are identified as promising protective materials and target configurations with distinguished ballistic performance.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Civil
Lin Chen, Hao Wu, Qin Fang, Ruiwen Li
Summary: Researchers have shown concerns about vehicle collisions with bridge piers, but limited vehicle collision tests have been conducted for reinforced concrete bridge piers. By conducting a full-scale crash test, valuable data will be obtained to study vehicular collisions with bridge piers, contributing to the calibration and validation of finite element models in this research area.
JOURNAL OF BRIDGE ENGINEERING
(2021)
Article
Mechanics
Zhangyu Wu, Jinhua Zhang, Hongfa Yu, Haiyan Ma, Qin Fang
Summary: This study investigated the compressive behavior of coral aggregate concrete (CAC) using a 3D mesoscale model, considering different volume fractions and maximum aggregate sizes (MASs). The results showed that the compressive strength of CAC generally decreases with the increase of MAS, but tends to slow down above the critical value, and exhibits a rebounding trend after reaching the optimum aggregate volume. Additionally, a regressive relation between concrete strength and aggregate volume was derived, providing insights for mix design and performance prediction of CAC.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Mingjin Cao, Li Chen, Rongzheng Xu, Qin Fang
Summary: Temperature significantly affects the ballistic performance of UHMWPE laminates, with the most noticeable effects at -20 and 95 degrees Celsius. Deformation and failure of UHMWPE laminates are not significantly impacted at 10 and 80 degrees Celsius.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Rongzheng Xu, Li Chen, Jinhua Zhang, Hengbo Xiang, Qin Fang
Summary: The study developed a numerical method and optimized parameters to show that a depleted uranium (DU) liner can replace a copper liner to improve the performance of a shaped charge. By adjusting liner parameters and standoff, the optimal penetration performance was determined.
INTERNATIONAL JOURNAL OF PROTECTIVE STRUCTURES
(2021)
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)
