Article
Chemistry, Physical
Sansit Patnaik, Fabio Semperlotti
Summary: This study introduces a theoretical framework based on variable-order mechanics for modeling dynamic fracture. The formulation utilizes variable and fractional-order operators to accurately capture features of dynamic crack propagation.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Engineering, Civil
Wen Hua, Jihong Ye
Summary: In this paper, a two-parameter damage criterion suitable for reticulated shell structures is proposed and multiple uncertainty analysis is carried out. The uncertainties of performance indicators and modelling are considered based on the traditional methods. The seismic risk assessments are conducted on two large-scale shaking table reticulated shell test models, and the influence of each uncertainty on the exceedance probability is analyzed. The results show that the two-parameter damage criterion can effectively evaluate the damage to reticulated shell structures and the modelling uncertainty has the greatest impact on the exceedance probability.
THIN-WALLED STRUCTURES
(2023)
Article
Physics, Multidisciplinary
Trevor J. Jones, Thomas Dupuis, Etienne Jambon-Puillet, Joel Marthelot, P. -t. Brun
Summary: This study investigates the physics of soft deployable structures using core-shell inflatables and proposes a strategy for synchronized deployment. Complex network structures are modeled to demonstrate the ability to reconfigure their final shape. Furthermore, the method is extended to assemble complex three-dimensional structures. These results utilize material and geometric nonlinearities to provide a low-energy pathway for growth and reconfiguration of soft deployable structures.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Taoying Liu, Mengyuan Cui, Qing Li, Shan Yang, Zhanfu Yu, Yeshan Sheng, Ping Cao, Keping Zhou
Summary: Multiple compression tests were conducted on rock-like samples with different crack geometries to investigate strength properties and crack propagation behavior considering multi-crack interactions. The study proposed a mechanical model of the multi-crack rock mass to investigate fracture and damage evolution traits based on the exploration of compression-shear wing crack initiation and propagation. The comparison between theory and experimental results revealed the variation of peak strength with fissure inclination angles and density of fissure distribution.
Article
Engineering, Multidisciplinary
Mehmet Hamarat, Sakdirat Kaewunruen
Summary: This paper proposes a novel approach based on the physical meaning of the bond network to evaluate damage in Peridynamic simulations and identify crack initiation and propagation. The commonly used nodal damage value is questioned for neglecting the relevance of broken bonds to cracks. The proposed method is shown to be robust, effective, and provide a single outcome for Peridynamic simulations.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Materials Science, Multidisciplinary
Erfan Azinpour, Jose Cesar de Sa, Abel Dias dos Santos
Summary: This study investigates the use of phase-field diffusive crack approach in predicting crack evolution in materials with voids, combining it with a pressure-dependent plasticity law to model material degradation. The method involves a damage evolution law and a crack initiation criterion for crack propagation, with a modified crack driving force based on internal damage sequence. Verification tests were conducted through numerical examples, focusing on monitoring crack patterns and material response with comparisons to existing literature data.
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2021)
Article
Engineering, Multidisciplinary
Semsi Rakici, Jinseok Kim
Summary: This study presents a new surface correction method for bond-based peridynamics that can discretely calculate the PD material parameters, effectively considering the effect of newly formed free surfaces during numerical simulations. The proposed method is shown to be more accurate in static and dynamic PD analyses by addressing missing neighbors and emerging boundaries during crack propagation, compared to existing surface correction methods.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Mechanics
Xing-Yuan Miao, Renchao Lu, Xiao Chen
Summary: This study investigates the fracture behavior of sandwich structures with foam core slits using the phase-field method to simulate the complex fracture process. It is found that structures with resin-filled slits exhibit better fracture resistance and ductility. The study also examines the effects of the number of slits, slit spacing, and foam core density on load-carrying capacity and fracture resistance.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Lixia Pan, Julian Carrillo, Maosen Cao, Ganggang Sha
Summary: This study introduces the use of multifractal analysis (MUTFA) to characterize the distribution and evolution of cracks in reinforced concrete (RC) structures, and proposes a new multifractal-spectrum shape parameter. The results demonstrate that this method can effectively reveal the complexity and irregularity of crack distributions, which helps in assessing damage in concrete structures.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Zhenbin Zha, Feng Xu, Yongcun Li, Yu Xiao, Xiaofang Hu
Summary: The study used high-resolution synchrotron radiation X-ray computed tomography technology to investigate the deformation and fracture evolution of the internal microstructure of the Strombus gigas shell. Important crack initiation and propagation phenomena were observed, leading to the proposal of a strengthening and toughening regulation mechanisms for lightweight composites design.
MATERIALS & DESIGN
(2021)
Article
Mechanics
Oguzhan Demir
Summary: This paper presents a numerical methodology for predicting crack growth path and life of structures containing cracks, applied to three different case studies on spur gear tooth. Three-dimensional non-planar fatigue crack propagation analyses are conducted using FRAC3D, showing close agreement with available data from the literature in terms of crack growth trajectories. The methodology and criteria introduced can be utilized for three-dimensional crack growth analysis with less user intervention, time, and effort.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
Chao Wu, Xiongjun He, Weiwei Wu, Kuiming Ji
Summary: This study investigates the low cycle fatigue behavior of GFRP RC beams through experimental and analytical investigation. The results show that GFRP RC beams have longer fatigue life and larger failure mid-span deflection compared to steel RC beams. The relationship between fatigue stress range and fatigue life is analyzed, and the crack propagation, deflection, dynamic stiffness, and damage evolution law of GFRP RC beams are deducted. Fatigue life prediction models based on crack propagation and damage evolution are derived.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Sadjad Naderi, Wenlin Tu, Mingzhong Zhang
Summary: A meso-scale modelling framework was used to investigate the fracture process in concrete under compression, showing that aggregate shape has minimal effect on compressive strength while aggregate irregularity significantly influences crack initiation and growth in concrete.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
F. He, V. K. Thakur, M. Khan
Summary: The study emphasizes the importance of comprehensive research on the crack propagation behavior of polymeric structures fabricated using three-dimensionally printed parts. Existing studies are found to be limited in accurately assessing the true crack growth phenomenon in real applications, posing a challenge for evaluating crack growth under time-dependent coupled loading conditions.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Engineering, Mechanical
Ziyi Wang, Shengchuan Wu, Yu Lei, Qianhua Kan, Guozheng Kang
Summary: In this study, the damage evolution of an extruded AZ31 magnesium alloy in uniaxial stress-controlled low cycle fatigue was investigated using a quasi-in-situ method. It was found that the fractions of slip bands and/or twins increased with the number of cycles in all samples until a critical cyclic number, and remained essentially unchanged thereafter. Inter-granular micro-crack initiation was favorable in the samples with twinning/detwinning/slipping (TDS) and slipping dominated (SD), while both inter-granular and intra-granular micro-cracks were observed in the sample with twin-ning/detwinning/basal slipping (TDBS). Furthermore, the non-Schmid behavior in crack trans-granular propagation was investigated.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Marine
Yu-Xiang Peng, A-Man Zhang, Fu-Ren Ming
Summary: In this study, numerical simulation of structural damage caused by near-field underwater explosion is conducted using SPH and RKPM coupling. Contact detection algorithm for large deformation and contact in underwater explosion problem is proposed, and the model's accuracy and robustness are verified through numerical examples.
Article
Engineering, Multidisciplinary
Yu-Xiang Peng, A-Man Zhang, Fu-Ren Ming
Summary: In this work, a particle regeneration technique is developed for Smoothed Particle Hydrodynamics (SPH) to address particle disorder phenomenon in strongly compressible flow. The multiphase interface is calculated using an interface reproducing algorithm, with modifications made to the momentum equation for Riemann SPH to eliminate instability. Several numerical examples were studied to validate the algorithm.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Ping-Ping Wang, A-Man Zhang, Zi-Fei Meng, Fu-Ren Ming, Xiang-Li Fang
Summary: The paper proposes a simple and accurate implementation of the WENO scheme to the SPH method, which is effective in solving compressible flows with discontinuities and small-scale structures. By searching for the closest particles and using Taylor series expansion, the scheme successfully addresses the issue of missing points caused by the Lagrangian characteristic of SPH.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Mechanical
Yu-Tong Sui, A-Man Zhang, Fu-Ren Ming, Shuai Li
Summary: This study investigates the oblique water entry of high-speed projectiles, revealing the impact of nose shape on cavity behavior and load characteristics. The dynamics of the cavity are classified into two types, showing a close relationship between transient impact load and cavity dynamics, with a quantitative relationship between load peaks and two dimensionless parameters uncovered.
JOURNAL OF FLUIDS AND STRUCTURES
(2021)
Article
Mechanics
Rui Han, A-Man Zhang, Sichao Tan, Shuai Li
Summary: The study investigates the nonlinear interaction between a cavitation bubble and the interface of two immiscible fluids. Two mechanisms contributing to fluid mixing are identified, including a high-speed liquid jet generated from the collapsing bubble and the pinch-off of an interface jet carrying droplets into the oil bulk.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Marine
Zi-Fei Meng, A-Man Zhang, Ping-Ping Wang, Fu-Ren Ming, Boo Cheong Khoo
Summary: This paper proposes a targeted essentially non-oscillatory (TENO) SPH scheme, which can be applied to reproduce compressible flows with shocks and small-scale structures, incompressible vortex flows, and free surface flows. The TENO reconstruction is implemented by modifying polynomial interpolations in SPH.
Article
Computer Science, Interdisciplinary Applications
Ming-Kang Li, A-Man Zhang, Yu-Xiang Peng, Fu-Ren Ming
Summary: In this study, an improved numerical model based on Smoothed Particle Hydrodynamics (SPH) is proposed for compressible fields. The model consists of MUSCL interpolation in multiphase flow, enhanced particle regeneration technique (PRT), and the particle shifting technique (PST) in compressible flows. The proposed model addresses compressible problems and aims to overcome issues related to mass conservation, over-dissipation, and wave front detection in multiphase flows. Validation and discussion of the proposed model are performed using challenging test cases, demonstrating its effectiveness and accuracy.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Marine
Wen-Bin Liu, Fu-Ren Ming, Shi-Ping Wang, Shuai Zhang
Summary: This paper uses the SPH method combined with the strip theory to study the flooding process of a damaged ship cabin in full-time domain and analyzes the effects of different factors. By simulating cabins with different opening positions and sizes, the paper compares and analyzes the displacement, velocity, and rolling angle of the cabin during the flooding process. The study also examines the impact of barriers within the cabin. The research provides valuable insights for the anti-sinking design of ships.
Article
Engineering, Marine
Xiang-Li Fang, Fu-Ren Ming, Ping-Ping Wang, Zi-Fei Meng, A-Man Zhang
Summary: This study analyzes the air-cushion effect and slamming load in water entry problems by applying a multiphase Riemann-SPH method with the PVRS Riemann solver. The accuracy and convergence of the method are validated through water slamming tests, and the influences of the air cushion and plate length on the slamming load are discussed. Finally, the impact velocity and deadrise angle are analyzed for their influences on slamming load characteristics in the simulation of the slamming of the LNG tank insulation panel.
Article
Mechanics
Yu-Tong Sui, Shuai Li, Fu-Ren Ming, A-Man Zhang
Summary: This study reports on an experimental investigation of the trajectories of truncated cone projectiles during water entry. The stability of the water entry trajectory is crucial for projectile motion control. It is found that the wetted surface of the projectile's nose plays a significant role in trajectory stability. The study systematically quantifies the relationship between trajectory stability and nose parameters, providing important insights for future design considerations.
Article
Engineering, Marine
Xiang-Li Fang, Fu-Ren Ming, Ping-Ping Wang, Peng-Nan Sun, A-Man Zhang
Summary: This paper investigates the interaction between a ship and large-scale bubbles, including those formed by the release of methane gas and submarine volcanic eruptions. Different conditions of ship interactions with large bubbles are simulated and discussed, providing a reference for studying ship capsizing caused by large-scale rising bubbles.
Article
Engineering, Marine
Han Cheng, Yong Liu, Fu-Ren Ming, Peng-Nan Sun
Summary: This paper studies the bouncing and coalescing behavior of two bubbles rising side by side in a fluid, using a multi-phase smoothed particle hydrodynamics (SPH) model. The numerical simulation is validated through various testing cases and the effects of viscous forces and surface tensions on bubble interaction are considered.
Article
Mechanics
Wen-Tao Liu, A-Man Zhang, Xu-Hong Miao, Fu-Ren Ming, Yun-Long Liu
Summary: A novel fluid-structure interaction (FSI) scheme based on the immersed boundary method is proposed to study high-speed water entry of slender bodies. The FSI scheme effectively suppresses non-physical force oscillation and describes rigid body motion using a quaternion-based six degrees of freedom motion system. The accuracy and robustness of the FSI scheme are validated using analytical solutions, experimental data, and literature data. The hydrodynamic loads and motion trajectory of different nose configurations are extensively discussed, with a focus on the tail slamming phenomenon.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Mechanical
Zi-Fei Meng, Fu-Ren Ming, Ping-Ping Wang, A-Man Zhang
Summary: This paper investigates the multiphase fluid-structure interaction in water entry problems and develops a reliable multiphase Riemann-SPH model that successfully simulates water-air flows and various water entry scenarios. The model yields satisfactory results when compared with experimental data, demonstrating its capability as a reliable tool in reproducing fluid-structure interaction problems.
ADVANCES IN AERODYNAMICS
(2021)
Correction
Engineering, Mechanical
Zi-Fei Meng, Fu-Ren Ming, Ping-Ping Wang, A-Man Zhang
ADVANCES IN AERODYNAMICS
(2021)
Article
Engineering, Multidisciplinary
Akshay J. Thomas, Mateusz Jaszczuk, Eduardo Barocio, Gourab Ghosh, Ilias Bilionis, R. Byron Pipes
Summary: We propose a physics-guided transfer learning approach to predict the thermal conductivity of additively manufactured short-fiber reinforced polymers using micro-structural characteristics obtained from tensile tests. A Bayesian framework is developed to transfer the thermal conductivity properties across different extrusion deposition additive manufacturing systems. The experimental results demonstrate the effectiveness and reliability of our method in accounting for epistemic and aleatory uncertainties.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhen Zhang, Zongren Zou, Ellen Kuhl, George Em Karniadakis
Summary: In this study, deep learning and artificial intelligence were used to discover a mathematical model for the progression of Alzheimer's disease. By analyzing longitudinal tau positron emission tomography data, a reaction-diffusion type partial differential equation for tau protein misfolding and spreading was discovered. The results showed different misfolding models for Alzheimer's and healthy control groups, indicating faster misfolding in Alzheimer's group. The study provides a foundation for early diagnosis and treatment of Alzheimer's disease and other misfolding-protein based neurodegenerative disorders using image-based technologies.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Jonghyuk Baek, Jiun-Shyan Chen
Summary: This paper introduces an improved neural network-enhanced reproducing kernel particle method for modeling the localization of brittle fractures. By adding a neural network approximation to the background reproducing kernel approximation, the method allows for the automatic location and insertion of discontinuities in the function space, enhancing the modeling effectiveness. The proposed method uses an energy-based loss function for optimization and regularizes the approximation results through constraints on the spatial gradient of the parametric coordinates, ensuring convergence.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bodhinanda Chandra, Ryota Hashimoto, Shinnosuke Matsumi, Ken Kamrin, Kenichi Soga
Summary: This paper proposes new and robust stabilization strategies for accurately modeling incompressible fluid flow problems in the material point method (MPM). The proposed approach adopts a monolithic displacement-pressure formulation and integrates two stabilization strategies to ensure stability. The effectiveness of the proposed method is validated through benchmark cases and real-world scenarios involving violent free-surface fluid motion.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Chao Peng, Alessandro Tasora, Dario Fusai, Dario Mangoni
Summary: This article discusses the importance of the tangent stiffness matrix of constraints in multibody systems and provides a general formulation based on quaternion parametrization. The article also presents the analytical expression of the tangent stiffness matrix derived through linearization. Examples demonstrate the positive effect of this additional stiffness term on static and eigenvalue analyses.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Thibaut Vadcard, Fabrice Thouverez, Alain Batailly
Summary: This contribution presents a methodology for detecting isolated branches of periodic solutions to nonlinear mechanical equations. The method combines harmonic balance method-based solving procedure with the Melnikov energy principle. It is able to predict the location of isolated branches of solutions near families of autonomous periodic solutions. The relevance and accuracy of this methodology are demonstrated through academic and industrial applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Weisheng Zhang, Yue Wang, Sung-Kie Youn, Xu Guo
Summary: This study proposes a sketch-guided topology optimization approach based on machine learning, which incorporates computer sketches as constraint functions to improve the efficiency of computer-aided structural design models and meet the design intention and requirements of designers.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Leilei Chen, Zhongwang Wang, Haojie Lian, Yujing Ma, Zhuxuan Meng, Pei Li, Chensen Ding, Stephane P. A. Bordas
Summary: This paper presents a model order reduction method for electromagnetic boundary element analysis and extends it to computer-aided design integrated shape optimization of multi-frequency electromagnetic scattering problems. The proposed method utilizes a series expansion technique and the second-order Arnoldi procedure to reduce the order of original systems. It also employs the isogeometric boundary element method to ensure geometric exactness and avoid re-meshing during shape optimization. The Grey Wolf Optimization-Artificial Neural Network is used as a surrogate model for shape optimization, with radar cross section as the objective function.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
C. Pilloton, P. N. Sun, X. Zhang, A. Colagrossi
Summary: This paper investigates the smoothed particle hydrodynamics (SPH) simulations of violent sloshing flows and discusses the impact of volume conservation errors on the simulation results. Different techniques are used to directly measure the particles' volumes and stabilization terms are introduced to control the errors. Experimental comparisons demonstrate the effectiveness of the numerical techniques.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Ye Lu, Weidong Zhu
Summary: This work presents a novel global digital image correlation (DIC) method based on a convolution finite element (C-FE) approximation. The C-FE based DIC provides highly smooth and accurate displacement and strain results with the same element size as the usual finite element (FE) based DIC. The proposed method's formulation and implementation, as well as the controlling parameters, have been discussed in detail. The C-FE method outperformed the FE method in all tested examples, demonstrating its potential for highly smooth, accurate, and robust DIC analysis.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mojtaba Ghasemi, Mohsen Zare, Amir Zahedi, Pavel Trojovsky, Laith Abualigah, Eva Trojovska
Summary: This paper introduces Lung performance-based optimization (LPO), a novel algorithm that draws inspiration from the efficient oxygen exchange in the lungs. Through experiments and comparisons with contemporary algorithms, LPO demonstrates its effectiveness in solving complex optimization problems and shows potential for a wide range of applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Jingyu Hu, Yang Liu, Huixin Huang, Shutian Liu
Summary: In this study, a new topology optimization method is proposed for structures with embedded components, considering the tension/compression asymmetric interface stress constraint. The method optimizes the topology of the host structure and the layout of embedded components simultaneously, and a new interpolation model is developed to determine interface layers between the host structure and embedded components.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Qiang Liu, Wei Zhu, Xiyu Jia, Feng Ma, Jun Wen, Yixiong Wu, Kuangqi Chen, Zhenhai Zhang, Shuang Wang
Summary: In this study, a multiscale and nonlinear turbulence characteristic extraction model using a graph neural network was designed. This model can directly compute turbulence data without resorting to simplified formulas. Experimental results demonstrate that the model has high computational performance in turbulence calculation.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Jacinto Ulloa, Geert Degrande, Jose E. Andrade, Stijn Francois
Summary: This paper presents a multi-temporal formulation for simulating elastoplastic solids under cyclic loading. The proper generalized decomposition (PGD) is leveraged to decompose the displacements into multiple time scales, separating the spatial and intra-cyclic dependence from the inter-cyclic variation, thereby reducing computational burden.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Utkarsh Utkarsh, Valentin Churavy, Yingbo Ma, Tim Besard, Prakitr Srisuma, Tim Gymnich, Adam R. Gerlach, Alan Edelman, George Barbastathis, Richard D. Braatz, Christopher Rackauckas
Summary: This article presents a high-performance vendor-agnostic method for massively parallel solving of ordinary and stochastic differential equations on GPUs. The method integrates with a popular differential equation solver library and achieves state-of-the-art performance compared to hand-optimized kernels.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
