Article
Engineering, Mechanical
V. Rey-de-Pedraza, M. L. Ruiz-Ripoll, C. Roller, D. A. Cendon, F. Galvez
Summary: Two different approaches for obtaining dynamic fracture properties of concrete are analyzed in this study, and their effectiveness is validated through experiments.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Mechanical
Rongxin Zhou, Yong Lu, Han-Mei Chen, Wei Wang
Summary: This study investigates the validity of traditional data processing methods in spalling tests through numerical simulations. The results highlight discrepancies and raise questions about the adequacy of inferring spalling strength from the traditional approach.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Mechanics
Payam Asadi, Ali Fakhimi, Mohammad Javad Ashrafi
Summary: This study examines the effect of defects and notches on the tensile strength of synthetic rock under static and dynamic loads. The results show that defects and notches enhance the response of synthetic rock to stress rate, and the fracture toughness increases significantly with intensified loading rate. Furthermore, when high-intensity loading rates are applied, the dynamic tensile strength remains unchanged with increasing notch length. Based on these findings, an equation is derived that suggests a linear relationship between rock tensile strength and strain rate.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Geosciences, Multidisciplinary
Zhoujie Gu, Rongxi Shen, Zhentang Liu, Enlai Zhao, Hailiang Chen, Zichen Yuan, Xiaomeng Chu, Jiawei Tian
Summary: Dynamic failure experiments were conducted on coal samples under dynamic load in a triaxial Split-Hopkinson pressure bar test system to study the dynamic characteristics of coal in a multi-axial pre-stress state. The experiments showed that the 3D pre-stress state significantly affects the dynamic failure of coal. The dynamic initial stress of coal increases linearly with strain, then grows at a reduced rate until the peak strength, and the mechanical curve rebounds notably. The dynamic strength factors of coal vary significantly with the increase of confining pressure.
NATURAL RESOURCES RESEARCH
(2023)
Article
Engineering, Mechanical
Zhuzhu Zhang, Haitao Mao, Yueliang Chen, Xingjun Wu, Shenglin Zhou, Wenlin Hu
Summary: Under the environmental conditions of an aircraft carrier, the dynamic fracture toughness of corroded 38CrMoAl steel was tested to determine its ability to withstand impact load and corrosion. Through experimental and numerical methods, the dynamic constitutive model parameters of the corroded steel were obtained and used to establish a finite element model. The fracture mechanism of the corroded steel under the interaction between corrosion and high strain rate loading was analyzed based on the fracture morphology and EDS energy spectrum.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Xueyuan Yan, Fengxuan Wang, Yihui Luo, Xuhong Liu, Zhengxian Yang, Huimin Mao
Summary: This study investigates the effects of single basalt fiber and basalt-polyethylene hybrid fiber on the impact resistance of concrete. The results show that basalt-polyethylene fiber reinforced concrete exhibits better impact resistance and deformation capability, with improvements in dynamic compressive strength, dynamic compressive toughness, and dynamic growth factor. The addition of basalt fiber and polyethylene fiber plays a buffering role in inhibiting crack propagation and slowing down the damage process.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Kai-Peng Zhou, Wei-Jian Yi, Hyeon-Jong Hwang, Yun Zhou
Summary: The bond strength between reinforcing bars and concrete is crucial for the performance of reinforced concrete structures. Both beam test and pull-out test are used to evaluate the bond strength, but beam test is more accurate while pull-out test is simpler and less time-consuming. By analyzing a large number of existing beam test and pull-out test data, a regression analysis was conducted to propose an empirical equation that better represents the bond strength phenomenon. The influence of different test methods on bond strength was evaluated, and a unified bond strength equation was proposed for beam and pull-out test specimens with ld/db>7.
Article
Engineering, Chemical
Payam Asadi, Ali Fakhimi
Summary: This study examines the combined influence of loading rate and particle size on the compressive and tensile strengths of rock using a computer program. The results show that particle size does not affect rock strength under static and dynamic loading, but it does modify the nominal tensile strength of notched Brazilian specimens. Particle size contributes to the tensile strength of intact Brazilian specimens at high stress rates, which can be justified based on the principles of fracture mechanics.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Construction & Building Technology
Yi Xu, Yangjie Chen, Qian Chen, Hongqiang Chu, Huajun Zu, Sheng Jiang, Peng Jiang, Juntao Mao
Summary: This study investigates the effect of curing conditions on the mechanical properties of fly ash concrete, focusing on compressive strength and stress-strain behavior. It also analyzes the dynamic mechanical responses of steam-cured concrete under different strain rates using the split Hopkinson pressure bar (SHPB) device. Experimental results show that static concrete strength decreases with the increase of fly ash content and follows a first-increase-then-decrease trend with steam curing temperature. The substitution of fly ash for cement reduces water consumption and weakens cement hydration, affecting the development of static strength. Steam curing temperature promotes cement hydration within a certain range but leads to the destruction of concrete microstructure at high temperatures, inhibiting strength development and causing instability. Moreover, the dynamic compressive strength of concrete is influenced more by strain rate than steam curing temperature. The study also confirms that changes in temperature and fly ash content increase microstructure pores, leading to a decrease in concrete strength. This research has significant implications for improving the safety of engineering facilities and adapting to the demands of modern engineering.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Geological
Bing Yang, Quan Jiang, Xiating Feng, Jie Xin, Dingping Xu
Summary: In this study, compression-shear tests and numerical simulations were conducted to investigate the shear failure mechanism of rock tunnels. The experimental results showed that the shearing process can be divided into four steps, and the roughness of the sheared fracture surface decreases with increasing normal stress. The numerical simulation results indicated the existence of stress concentration during the shearing process, and the presence of adjacent tunnels increased the degree of stress concentration.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Xiang Zhou, Youjun Xie, Xiaohui Zeng, Guangcheng Long, Junqing Wu, Gang Ma, Fang Wang, Hong Zhao, Li Yao
Summary: In this study, a concrete meso-scale modeling framework based on discrete element method (DEM) was proposed, and the effect of aggregate strength on the dynamic tensile mechanical properties of high-strength concrete was quantitatively studied. The results revealed the important role of aggregate strength in the dynamic tensile properties of concrete.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Zhendan Lu, Yunxia Chen, Tianpei Zu, Wenbo Zhang
Summary: In this paper, a damage-connectivity spalling model (DCSM) is proposed to describe the formation and evolution of multiple irregular spalling cavities on the gear tooth face deriving from the initial defects. A type of TVMS-based indicator is established to represent the evolutionary severity of irregular spalling cavities, and a service life prediction method is developed based on the proposed indicators. The effectiveness of the DCSM model is verified through comparison with gear spalling experiments, and the effects of working load, depth ratio, and quantity ratio of initial defect groups on the service life are discussed.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Meizhen Xiang, Songqing Jiang, Junzhi Cui, Yun Xu, Jun Chen
Summary: Researchers developed a continuum model of micro-spalling by coupling hydroelastic-plastic-damage mechanics and high-pressure melting kinetics, successfully simulating plate impact spalling experiments on aluminum while considering both damage and melting effects in the fracture process.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Chemistry, Multidisciplinary
Han Meng, Yuzhong Yang, Liyun Wu, Daming Yang, Chenlin Wang
Summary: In this study, dynamic tensile strength deformation, energy evolution, and crack development under an impact test were investigated on Brazilian coal samples. The results showed that the dynamic tensile strength of the vertical bedding direction is higher than that of the parallel bedding direction when the impact velocity is greater than 4.75 m/s. With the increase in impact velocity, the dynamic strain and ultimate strain rate of the coal samples increased, while the average value of the dynamic deformation moduli of the samples decreased. The test results can be used for predicting coal and rock outburst in deep underground coal excavation.
Article
Construction & Building Technology
Carmen Andrade, Sergio Oller, Francisco-Javier Perez Trujillo
Summary: The corrosion of steel reinforcement affects the bearing capacity of structures. This study classifies the types of corrosion and provides expressions to calculate the corrosion factor and critical stress intensity factor.
STRUCTURAL CONCRETE
(2023)
Article
Multidisciplinary Sciences
Benjamin Erzar, Christophe Pontiroli, Eric Buzaud
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2017)
Article
Materials Science, Multidisciplinary
Pascal Forquin, Gilles Rossiquet, Jean-Luc Zinszner, Benjamin Erzar
MECHANICS OF MATERIALS
(2018)
Article
Physics, Multidisciplinary
Benjamin Erzar
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2018)
Article
Mechanics
Erik Olsson, Denis Jelagin, Pascal A. Forquin
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2019)
Article
Materials Science, Multidisciplinary
Yannick Duplan, Dominique Saletti, Pascal Forquin
Article
Engineering, Multidisciplinary
Pascal Forquin, Bratislav Lukic, Dominique Saletti, Laurent Sallier, Fabrice Pierron
MEASUREMENT SCIENCE AND TECHNOLOGY
(2019)
Article
Materials Science, Characterization & Testing
Bratislav Lukic, Dominique Saletti, Pascal Forquin
Article
Engineering, Mechanical
M. Blasone, D. Saletti, J. Baroth, P. Forquin, E. Bonnet, A. Delaplace
Summary: This paper presents an experimental approach for identifying the parameters of a coupled plasticity-damage model to simulate the mechanical behavior of UHPFRC under impact. The model successfully simulates the ballistic impact of AP projectiles in Abaqus, with parameters identified based on various loading conditions. The influence of friction at the projectile-target interface is also discussed, and numerical results are compared to post-mortem observations and X-ray CT reconstruction.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
M. Dargaud, P. Forquin
Summary: In this study, an experimental technique based on the plate-impact technique was developed to measure the tensile strength of ceramic materials. Numerical simulations were used to design various geometries of wavy-machined flyer-plates, and the spall strength of the material and the strain rate in the failure zone were evaluated experimentally and through elasto-plastic numerical simulations, respectively. The plate-impact technique was found to allow for well-controlled strain-rate loading around 10^4 -10^5 s(-1) with relatively long rising time, providing a suitable tool to investigate high strain-rate behavior of ceramic materials.
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
D. Georges, D. Saletti, M. Montagnat, P. Forquin, P. Hagenmuller
Summary: The impact of ice on structures, particularly aeronautical or space crafts, is a major concern due to the damage caused by atmospheric ice, especially hailstones during hailstorms. Limited research has been done on the tensile strength of ice under dynamic loading. This study investigates the role of porosity in the tensile behavior of ice, showing that strength increases with strain rate but decreases with increasing porosity.
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
(2021)
Article
Materials Science, Characterization & Testing
Pascal Forquin, Reem Abdul-Rahman, Dominique Saletti
Summary: This paper presents a new experimental method, called PS-PTS, for characterizing the confined shear strength of concrete or rock-like materials using a pre-stressed sample. The method involves using a metallic confinement cell and a hydraulic press to apply confinement force and differential displacement to the sample, respectively. The results are compared to data obtained using a traditional testing method.
Article
Materials Science, Multidisciplinary
R. Abdul Rahman, P. Forquin
Summary: The study proposes an experimental method to investigate the shear behaviour of concrete under high confinement in static conditions. The experimental tests show that higher confining pressure leads to higher concrete shear strength.
EXPERIMENTAL MECHANICS
(2023)
Proceedings Paper
Physics, Condensed Matter
B. Erzar, G. Le Blanc, F. Malaise, E. Buzaud
SHOCK COMPRESSION OF CONDENSED MATTER - 2017
(2018)
Article
Materials Science, Multidisciplinary
P. Forquin, B. Lukic
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Bratislav B. Lukic, Dominique Saletti, Pascal Forquin
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
(2018)
Article
Mechanics
Zhiqiang Meng, Xu Gao, Hujie Yan, Mingchao Liu, Huijie Cao, Tie Mei, Chang Qing Chen
Summary: This paper presents a cage-shaped, self-folding mechanical metamaterial that exhibits multiple deformation modes and has tunable mechanical properties, providing multifunctional applications in various fields.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hasan Murat Oztemiz, Semsettin Temiz
Summary: Sandwich panel composites have various applications and their mechanical behavior and performance depend on material properties and geometry. The load-carrying capacity of S-core composite sandwich panels increases with the increase of the core wall thickness, but decreases with the increase of the core height.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yang Sun, Wei Zhang, Weipeng Hu, Mabao Liu
Summary: The study presents a novel computational framework to investigate the effect of graphene percolation network on the strength-ductility of graphene/metal composites. It utilizes the Cauchy's probabilistic model, the field fluctuation method, and the irreversible thermodynamics principle.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Elaheh Kazemi-Khasragh, Juan P. Fernandez Blazquez, David Garoz Gomez, Carlos Gonzalez, Maciej Haranczyk
Summary: This study explores group interaction modelling (GIM) and machine learning (ML) approaches for predicting thermal and mechanical properties of polymers. ML approach offers more reliable predictions compared to GIM, which is highly dependent on the accuracy of input parameters.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yafei Yin, Shaotong Dong, Dong Wu, Min Li, Yuhang Li
Summary: This paper investigates a bending-induced instability in sandwiched composite structures, and establishes a phase diagram to predict its characteristics. The results are of great significance in understanding the physical mechanisms of bending instability and providing design guidelines for practical applications.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Dhairya R. Vyas, Sharen J. Cummins, Gary W. Delaney, Murray Rudman, Devang V. Khakhar
Summary: In this study, multiple collisions of granules on a substrate are analyzed using Collisional Smooth Particle Hydrodynamics (CSPH) to understand the influence of impact-induced deformation on subsequent collision dynamics. It is found that the collision dynamics are dependent on the impact location and the deformation caused by preceding impacts. The accuracy of three theoretical models is also evaluated by comparing their predictions with CSPH results, and it is discovered that these models are only useful for predicting collisions at the same location repeatedly.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Sneha B. Cheryala, Chandra S. Yerramalli
Summary: The effect of hybridization on the growth of interface crack along the fiber is predicted. The study shows an enhancement in the compressive splitting strength with hybridization due to the lateral confinement effect on the interfacial crack.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Xiang-Nan Li, Xiao-Bao Zuo, Liang Li, Jing-Han Liu
Summary: A multiscale mechanical model is proposed to quantitatively describe the macro-mechanical behavior of fiber reinforced concrete (FRC) based on its multiscale material compositions. The model establishes the stiffness and strength equations for each scale of FRC and demonstrates the influence of steel fiber parameters on the mechanical properties of FRC.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Vicente Ramirez-Luis, Hilario Hernandez-Moreno, Orlando Susarrey-Huerta
Summary: In this paper, a Multicell Thin-walled Method is developed for studying the stress distributions in multimaterial beams. This method accurately obtains complex stress fields while reducing the solution time and computational cost. Validation with the finite element method confirms the accuracy of the proposed method.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yanfeng Zheng, Siyuan Li, Jingyao Zhang, Yaozhi Luo
Summary: This study proposes an enhanced simplified model based on finite particle method (FPM) to consider the link cross-sectional size and contact in Bennett linkages. The model introduces virtual beams and contact forces to accurately simulate the real-world behavior of Bennett linkages. The proposed method is effective for dynamic analysis of large-scale deployable Bennett linkages and shows great potential.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Viktoriya Pasternak, Heorhiy Sulym, Iaroslav M. Pasternak
Summary: This paper investigates anisotropic elastic, magnetoelectroelastic, and quasicrystal solids and presents their equations of time-harmonic motion and constitutive relations in a compact and unified form. A matrix approach is proposed to derive the 3D time-harmonic Green's functions for these materials. The effects of phason field dynamics on the phonon oscillations in quasicrystals are studied in detail. The paper provides a strict proof that the eigenvalues of the time-harmonic magnetoelectroelaticity problem are all positive. It also demonstrates the application of the obtained time-harmonic Green's functions in solving boundary value problems for these materials using the derived boundary integral equations.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Jan Tomec, Gordan Jelenic
Summary: This paper investigates the relationship between different formulations and contact-force models in beam-to-beam contact mechanics. It specifically addresses the recently developed mortar method and develops its variant based on the penalty method. The developed elements are tested using the same examples to provide an objective comparison in terms of robustness and computational cost.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Paulo Teixeira Goncalves, Albertino Arteiro, Nuno Rocha, Fermin Otero
Summary: This work presents a novel formulation of a 3D smeared crack model for unidirectional fiber-reinforced polymer composites based on a stress invariant approach for transverse yielding and failure initiation. The performance of the model is evaluated using monotonic and non-monotonic damage evolution, verified with single element tests and compared with experimental results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hanbin Yin, Yinji Ma, Xue Feng
Summary: This paper investigates the peeling behavior of a viscoelastic film bonded to a rigid substrate and establishes a theoretical peeling model. The study reveals three typical relationships between the peeling force and peeling velocity, which depend on the viscous dissipation within the film and the rate-dependent adhesion at the interface. Additionally, factors such as film thickness, interfacial toughness, and interfacial strength are identified as influencing the steady-state peeling force.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Peter Noe Poulsen, John Forbes Olesen
Summary: Finite Element Limit Analysis (FELA) is increasingly used to calculate the ultimate bearing capacity of structures made of ductile materials. This study presents a consistent and general weak formulation based on virtual work for both the lower and upper bound problem, ensuring uniqueness of the optimal solution. A plane element with linear stress variation and quadratic displacement field is introduced, showing good results for load level, stress distribution, and collapse mechanism even for coarse meshes in verification and reinforced concrete examples.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)