Article
Construction & Building Technology
Chenxuan Lu, Yongcheng Ji, Yunfei Zou, Jieying Zhou, Yuqian Tian, Zhiqiang Xing
Summary: The evaluation of frost resistance for concrete reinforced with FRP varies depending on the reinforcement methods used. In this study, freezing and thawing tests were conducted on FRP-reinforced concrete prisms and cylinders to simulate various structures in cold climates. The specimens' frost resistance was evaluated through reinforcement techniques, morphological analysis, weight tests, and relative dynamic modulus of elasticity tests. The findings showed significant differences in weight and strength changes after freeze-thaw cycles, with CFRP and GFRP-reinforced concrete exhibiting better resistance compared to unreinforced concrete. Finite element software ABAQUS was also used to simulate the freeze-thaw cycle test and verify the validity of the FRP-reinforced concrete model.
Article
Construction & Building Technology
Fangyu Liu, Ke Xu, Wenqi Ding, Yafei Qiao, Linbing Wang
Summary: The study shows that increasing steel fibers can enhance the mechanical properties of HFRC, especially the strength indices, while adding more PVA fibers can improve the toughness of HFRC, but may reduce strength indices.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Jun Zhao, Feicheng Wang, Yinhong Zhu, Bai Yang
Summary: An oblique grid of intersecting nodes composed of steel outer tubes and steel fiber, recycled concrete inner tubes (OGSFRCIN) has been proposed for the construction of high-rise oblique grid buildings to save resources. The mechanical properties of the nodes under axial pressure were studied using ABAQUS, considering six parameters: oblique angle, stiffening ring thickness, connecting plate thickness, concrete strength, recycled aggregate replacement rate, and steel fiber content. The results show that oblique angle, connecting plate thickness, concrete strength, and steel fiber content significantly affect the ultimate bearing capacity. The OGSFRCIN have good mechanical properties and can be applied in engineering practice.
Article
Mechanics
E. Kormanikova, M. Zmindak, P. Novak, P. Sabol
Summary: This paper investigates the material properties of carbon fiber-reinforced composite materials through numerical homogenization and experimental research, as well as their application in strengthening reinforced concrete structures. The results indicate that using composite lamella can reduce the maximum tensile stress in concrete and concrete reinforcement.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
MinJoo Lee, Hyo-Gyoung Kwak, Gang-Kyu Park
Summary: An improved calibration method for the K&C material model, tailored for steel-fiber reinforced concrete, is proposed in this study. The method is verified through single element tests and finite element modeling, showing its validity and applicability for SFRC material properties.
COMPOSITE STRUCTURES
(2021)
Article
Polymer Science
Rajesh Kumar Mishra, Bijoya Kumar Behera, Vijay Chandan, Shabnam Nazari, Miroslav Muller
Summary: This investigation predicts the mechanical behavior of basalt-fiber-reinforced concrete using the finite element method (FEM) and validates the results through experiments. The study shows that basalt-fiber-reinforced concrete has superior mechanical properties compared to conventional concrete, with significant improvement under increased loading. It also offers a lightweight construction material and overcomes the problem of corrosion.
Article
Materials Science, Multidisciplinary
Zhennan Li, Aiqin Shen, Guopeng Zeng, Zhengtong Chen, Yinchuan Guo
Summary: This paper provides a review of the latest research progress on basalt fiber-reinforced concrete (BFRC) and analyzes the effect of basalt fiber on the properties and microstructure of BFRC. The research shows that basalt fiber significantly improves the flexural strength, crack resistance, and frost resistance of concrete, while the effect on compressive strength and impermeability remains uncertain.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Civil
Linh Van Hong Bui, Pitcha Jongvivatsakul, Pornpen Limpaninlachat, Boonchai Stitmannaithum, Thanh-Truong Nguyen, Trong-Phuoc Nguyen
Summary: The study investigated the applicability of the FE method for simulating the structural responses of degraded RC beams repaired with SFRC. The results showed that beams repaired with SFRC with 2% of steel fiber volume had the largest crack resistance after high corrosion degree. The failure of SFRC-repaired beams tended to shift from brittle shear failure to ductile failure.
Article
Construction & Building Technology
Junlin Gong, Yuzhuo Wang, Shuang Qu, Bingjie Zhang, Jinpeng Feng
Summary: A composite structure of steel reinforced reactive powder concrete (SRRPC) is proposed for building structures with excellent bearing capacity, stiffness, ductility, fire resistance and seismic performance. The mechanical characteristics of SRRPC columns were investigated using finite element software ABAQUS, and the consistency between the model and test results were verified. The study analyzed the influence of various factors on the mechanical characteristics of SRRPC columns and proposed a calculation method for bearing capacity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Mechanics
Hezi Y. Grisaro
Summary: In this paper, a mechanical model is developed to simulate the behavior of 1D plain reinforced concrete (RC) and fiber reinforced concrete (FRC) members subjected to uniaxial tension, considering the development of discrete cracks. The model is more general than previous ones as it can utilize any loading scheme, constitutive laws or boundary conditions. It is validated and shown to be capable of simulating FRC members and incorporating the contribution of fibers in bridging residual tensile forces over the cracks. The influence of fiber volume on the global structural behavior of FRC members is discussed.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Erfan Najaf, Hassan Abbasi
Summary: In this study, two types of macro-synthetic polypropylene fibers, Forta and Barchip, were used to investigate their effects on the mechanical properties of concrete. The results showed that Forta fibers increased the compressive strength and ductility, while Barchip fibers significantly improved the flexural strength. The hybrid usage of fibers further enhanced the mechanical performance of the concrete.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Erfan Najaf, Hassan Abbasi
Summary: This study investigates the effects of adding different proportions of Forta and Barchip polypropylene fibers on the performance of concrete. The findings demonstrate that Forta fibers are more effective in improving ductility, while Barchip fibers significantly enhance the flexural strength of concrete.
STRUCTURAL CONCRETE
(2023)
Review
Construction & Building Technology
Xinglong Yao, Zhiyang Pei, Haoyuan Zheng, Qizhou Guan, Fupeng Wang, Shuo Wang, Yongcheng Ji
Summary: This study discusses the enhancement mechanism of various fibers on the mechanical properties, high-temperature resistance, and freeze-thaw cycle resistance of recycled aggregate concrete. The results indicate that fibers can significantly improve the flexural strength and tensile strength of recycled aggregate concrete and can also improve its performance at higher temperatures. Additionally, the type and content of fibers have an impact on the properties of recycled aggregate concrete and its resistance to freeze-thaw damage.
Article
Chemistry, Multidisciplinary
Predrag Blagojevic, Nikola Blagojevic, Danijel Kukaras
Summary: This paper aims to provide a better understanding of how the variance of material properties of SFRC affects the flexural behavior of SFRC beams. By establishing a model and conducting sensitivity analysis, it reveals that the variance in residual tensile strength is the main contributor to the variance in the flexural behavior of an SFRC beam.
APPLIED SCIENCES-BASEL
(2021)
Article
Green & Sustainable Science & Technology
Nicola Scattarreggia, Tianyue Qiao, Daniele Malomo
Summary: This study validated fiber-based finite element models for hollow-section RC columns and investigated the influence of corrosion-induced damage on structural performance. Different modeling strategies were used to simulate varying degrees of corrosion damage, exploring collapse behavior and impacts on structural capacity. Results showed minimal influence of cover loss, but significant reductions in base shear and displacement capacity when relevant levels of deterioration due to corrosion were introduced. Simplified assumptions may lead to less accurate predictions.
Article
Construction & Building Technology
M. Nili, A. H. Ghorbankhani, A. AlaviNia, M. Zolfaghari
CONSTRUCTION AND BUILDING MATERIALS
(2016)
Article
Engineering, Civil
Mahmoud Nili, Alireza Azarioon, Amir Danesh, Ali Deihimi
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING
(2018)
Article
Engineering, Civil
Ahmad Ehsani, Mahmoud Nili, Keyvan Shaabani
KSCE JOURNAL OF CIVIL ENGINEERING
(2017)
Article
Construction & Building Technology
Mahmoud Nili, Alireza Azarioon, S. Mahdi Hosseinian
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2017)
Article
Construction & Building Technology
Nader Biglarijoo, Mahmoud Nili, Seyed Mahdi Hosseinian, Mehrdad Razmara, Siavash Ahmadi, Parisa Razmara
MAGAZINE OF CONCRETE RESEARCH
(2017)
Article
Construction & Building Technology
Syamak Tavasoli, Mahmoud Nili, Behrad Serpoush
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
Mahmoud Nili, Mehrdad Razmara, Maryam Sadeghi, Majid Razmara
MAGAZINE OF CONCRETE RESEARCH
(2018)
Article
Materials Science, Characterization & Testing
Mahmoud Nili, Mehrdaad Razmara
JOURNAL OF TESTING AND EVALUATION
(2020)
Article
Chemistry, Physical
Mahmoud Nili, Hossein Sasanipour, Farhad Aslani
Article
Materials Science, Multidisciplinary
Mandi Hedayatian, Khodadad Vahedi, Alireza Nezamabadi, Amir Momeni
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Engineering, Multidisciplinary
Mandi Hedayatian, Amir Momeni, Alireza Nezamabadi, Khodadad Vahedi
COMPOSITES PART B-ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Mahdi Hedayatian, Amir Momeni
Summary: This study investigated the effect of graphene oxide (GO) nanoplates on the strengthening mechanism of Al6061-GO nanocomposites. The results showed that GO nanoplates have a strong strengthening effect and increase in ductility in the fabricated composites. The modified shear-lag and the modified Zhang-Chen strengthening mechanisms were utilized to model the strengthening effect of GO, and both models satisfactorily predicted the yield strength of the fabricated nanocomposites.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
N. Haghighat, Mahmoud Nili, A. Montazerian, Rezaii Yousef
ADVANCES IN CIVIL ENGINEERING MATERIALS
(2020)
Article
Construction & Building Technology
Ebrahim Nazarimofrad, Faiz Uddin Ahmed Shaikh, Mahmoud Nili
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2017)
Article
Construction & Building Technology
Mahmoud Nili, Mehrdad Razmara, Mojtaba Nili, Parisa Razmara
CONSTRUCTION AND BUILDING MATERIALS
(2017)
Article
Engineering, Mechanical
A. P. Simonov, I. V. Sergeichev
Summary: The direct impact method provides a higher sample deformation rate and reliable results for materials with low yield strength and hardening rate. This study proposes an alternative procedure for calculating the strain rate in order to improve accuracy of the direct impact method for a wide range of metals and alloys. The proposed method has been validated through finite element analysis and direct impact tests, and it qualitatively changes the shape of the stress-strain curve by adding an unloading area.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Qiang Wei, Zifeng Li
Summary: This study investigates the dynamic bifurcation of a column when it impacts a rigid plane vertically, which is different from the classical Eulerian static buckling. The findings show that either the dimensionless critical buckling time or the dimensionless critical buckling velocity can be used to determine whether buckling has occurred. Different dimensionless initial defects in the column result in different dimensionless displacement responses, and the nonlinear effect influences the analysis results.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
M. C. Price, M. J. Cole, K. H. Harriss, L. S. Alesbrook, M. J. Burchell, P. J. Wozniakiewicz
Summary: This article introduces a new gas gun developed at the Centre for Astrophysics and Planetary Science, University of Kent, which can produce vertical impacts at speeds up to 2 km/s. The gun design, assembly, operation, and ancillary components are described in detail. The experimental results demonstrate that the gun performs as expected.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Fanny Gant, Gabriel Seisson, Patrice Longere, Skander El Mai, Jean-Luc Zinszner
Summary: The article investigates the high strain rate response of metals and alloys under radial expansion and compares different materials. The results show that different materials exhibit different responses in terms of deformation and fracture.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
M. D. Fitzgerald, J. D. Pecover, N. Petrinic, D. E. Eakins
Summary: This study investigates the mechanism for the destruction of thick flyers accelerated using electric guns and proposes strategies for mitigating their break-up based on experimental results and mathematical models. The findings suggest that limiting the maximum pressure within the flyer and extending the current rise time can prevent flyer failure, increasing the efficiency and shock duration of the electric gun.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Guowen Gao, Enling Tang, Guolai Yang, Yafei Han, Mengzhou Chang, Kai Guo, Liping He
Summary: In this study, the dynamic constitutive model of Al/Ep/W material was investigated and verified through experiments and numerical simulations. The proposed model accurately described the mechanical behavior of the material under high strain rates, providing an important reference for evaluating the response characteristics of the new energetic material projectile to lightweight aluminum armor.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Minzu Liang, Meng Zhou, Xiangyu Li, Yuliang Lin, Fangyun Lu
Summary: UHMWPE fiber mesh reinforced polyurea composites improve structural strength and blast resistance performance, and can alter the failure mode. Loose filler is generated as polyurea melts and fragments penetrate. Joint loads are classified into three categories based on their connection and duration.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Ashutosh Jha, Guglielmo Cimolai, Iman Dayyani
Summary: The present article introduces the Zero Poisson's Ratio Fish Cells metamaterial and investigates the effects of Poisson's ratio on the crashworthiness of different lattice structures. Numerical results demonstrate that the Zero Poisson's Ratio model possesses greater stability and structural integrity with minimal edge deformations.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Hongbo Zhang, Dayong Hu, Xubin Ye, Xin Chen, Yuhuai He
Summary: This study investigated the impact of spherical foreign objects on simulated blade edges through experimental and theoretical analysis. The experimental results showed that increasing impact energy resulted in larger damage sizes, and three distinct types of deformations were observed in FOD. Accurate FOD prediction models were developed using linear and power formulas. The theoretical analysis using a spring-mass system based on Winkler's elastic-plastic foundation theory yielded results in good agreement with experimental measurements, providing a reference for fatigue life assessment of aeroengine blades.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
L. M. Reitter, Y. A. Malik, A. B. Jahn, I. V. Roisman, J. Hussong
Summary: This study characterizes the dynamic strength of wet granular ice layers through impact tests. The results reveal strong connections between ice particles in ice layers generated by ice crystal accretion. Comparable strength values can be obtained by reinforcing ice particle connections in ice layers prepared in the laboratory.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Kyle Mao, Genevieve Toussaint, Alexandra Komrakova, James D. Hogan
Summary: In this study, the Generalized Incremental Stress State dependent damage MOdel (GISSMO) is used to simulate the high-velocity impact failure of Armox 500T steel. The GISSMO is calibrated and validated using experimental data from the literature, and is then applied to investigate the impact failure behaviors of bi-layered steel systems. The results provide new capabilities and insights for the design of armor structures and evaluation of impact failure behaviors in Armox 500T/RHA bi-layered systems.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Asim Onder
Summary: This paper investigates the performance of bumper plates with wavy surfaces under hypervelocity impact and finds that they are more effective in decreasing the impact energy compared to flat plates. The study also reveals the distinctive debris cloud generation that has never been reported before.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Zhi-Yong Yin, Xiao-wei Chen
Summary: This study numerically reveals three typical fracture modes of explosively-driven metal shells and investigates the influencing factors of different fracture modes through experimental data and dimensional analysis.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Jiri Pachman, David J. Chapman, Marek Foglar, Martin Kunzel, William G. Proud
Summary: Through the study of different types of concrete, it was found that despite their compositional complexity, range of compressive strengths, and reinforcement methods, the average Hugoniot data were remarkably similar between different concrete types.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
Article
Engineering, Mechanical
Konstantin Kappe, Klaus Hoschke, Werner Riedel, Stefan Hiermaier
Summary: This paper presents a multi-objective optimization procedure for effectively designing gradient lattice structures under dynamic loading. The aim is to maximize energy absorption characteristics and achieve a lightweight design. Through considering design variables such as the relative density and density gradient, the peak crushing force reduction and maximized specific energy absorption are simultaneously optimized. A simplified beam-based finite element model is used to efficiently model and simulate the lattice structures. An artificial neural network is trained to predict energy absorbing characteristics and find optimal lattice structure configurations. The network is trained using a multi response adaptive sampling algorithm, allowing parallel simulation with automatically generated finite element models. A multi-objective genetic algorithm is then used to find optimal combinations of design parameters for lattice structures under different impact velocities and cell topologies.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2024)
