Article
Engineering, Civil
Hamed Rahman Shokrgozar, Vahid Akrami, Tayebeh Jafari Ma'af, Naseraldin Shahbazi
Summary: This study investigated the remedial effects of using steel casing and CFRP sheets on the axial load carrying capacity of damaged steel cylindrical shells. Experimental results showed that both techniques improved the load-carrying behavior of damaged specimens. Numerical analysis focused on different parameters of the steel casing strengthening technique to determine their influence on efficacy, providing practical recommendations for selecting appropriate parameters.
Article
Construction & Building Technology
Zhuang Zhao, Yang Wei, Gaofei Wang, Kunting Miao, Kaiqi Zheng
Summary: The calculations of the axial compressive load-carrying capacity of square concrete-filled steel tubular (SCFST) columns and rectangular concrete-filled steel tubular (RCFST) columns are complex due to the nonuniform constraints of the steel tubes on concrete. In this study, a unified model for the axial compression load-carrying capacity of SCFSTs and RCFSTs was established by creatively dividing the calculation of axial compression load-carrying capacity of RCFST columns into five parts using the superposition principle. The proposed model was verified using a database of 449 published RCFST and SCFST columns, and the influences of parameters on the load-carrying capacity of RCFSTs were studied in detail.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Bo-Li Zhu, You-Hao Zhang, Yan-Lin Guo, Wang-Hui Liu
Summary: This study investigates the elastic buckling behavior of Grid Cylindrical-Lattice Shells (GCLSs) under axial compression, revealing that GCLS tends to fail due to global flexural buckling and circumferential multi-wave buckling under axial compression.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Construction & Building Technology
Zhuang Zhao, Yang Wei, Gaofei Wang, Yu Lin, Mingmin Ding
Summary: This study introduces the extension evaluation method and constructs a multilevel extension evaluation model for the load-carrying effect of RCFST columns. Key parameters affecting the load-carrying effect are refined and converted into evaluation indices, and their weights are calculated scientifically. The proposed evaluation model is verified through extension evaluation of tested RCFST columns. The conclusion shows that moderately thick-walled RCFST columns have the best load-carrying effect and economy among different steel tubes.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Engineering, Marine
Shen Li, Do Kyun Kim
Summary: This study focuses on the parametric investigation of unstiffened cylindrical shells under axial compression, finding that the ultimate strength is highly sensitive to initial geometric imperfections. Current code-based approaches appear to be overly conservative in predicting the ultimate compressive strength of cylindrical shells.
Article
Engineering, Multidisciplinary
Yong Cao, Ziwen Guo, Yilin Qu
Summary: This paper investigates the mechanically induced electric potential and charge redistribution in a piezoelectric semiconductor cylindrical shell. The results show that doping levels can affect the electric potentials and mechanical displacements, and alter the peak position of the zeroth-order electric potential. The doping level also has an inhibiting effect on the first natural frequency. These findings are crucial for optimizing the design and performance of cylindrical shell-shaped sensors and energy harvesters.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Construction & Building Technology
Wenguang Chen, Jinjun Xu, Zhipeng Li, Xinliang Huang, Yuntian Wu
Summary: This paper evaluates several code-based models based on a reliable experimental database, identifies the statistical characteristics of the compressive strength of RAC, and investigates the reliability of circular RAC-FST stub columns designed using existing design factors. Results show that existing design factors need to be calibrated in order to achieve reasonable design, and a combined partial factor is proposed to reduce the whole resistance of the composite cross-section.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Alireza Moradia, Davood Poorveis, Amin Khajehdezfulyb
Summary: A review of previous studies shows that only the buckling load of FGM elliptical cylindrical shell under non-follower lateral load was investigated in the literature. This study is the first to obtain the buckling load of elliptical FGM cylindrical shells under follower lateral load and also make a comparison between buckling loads of elliptical FGM cylindrical shells under follower and non-follower lateral loads. Parametric study indicates that the buckling load of long elliptical cylindrical shell under non-follower load is not reliable.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Liwei Zhang, Qilin Zhao, Yaxin Huang, Fei Li, Jiangang Gao, Yadan Wang, Chenming Guo
Summary: A new method for manufacturing composite cylindrical shells with large diameters, lengths, and 0-degree fibers is proposed in this study. The method involves using a cross section configuration of inner annular block and outer annular continuous fiber, resulting in low-cost production of these shells.
POLYMER COMPOSITES
(2022)
Article
Engineering, Civil
Zheng Li, Hartmut Pasternak, Andreas Jaeger-Canas
Summary: Through small-scale experimental series to calibrate numerical models, this paper verified the closeness of the results calculated by finite element analysis and the test results. Meanwhile, the influence of ring-stiffener parameters on buckling load and knockdown factor was discussed.
THIN-WALLED STRUCTURES
(2021)
Article
Chemistry, Physical
Zhuo-Wu Wang, Jian Tang, Shou-Chao Li, Xiao-Hua He, Chang-Yu Zhou
Summary: This study investigates the buckling load of cylindrical shells containing cracks through experimental tests and finite element simulations. The results show that factors such as length-diameter ratio, diameter-thickness ratio, crack length, and crack inclination have an influence on the buckling load. The agreement between experimental and numerical results validates the reliability of the finite element simulations. The research findings provide valuable references for evaluating the load capacity of structures containing cracks.
Article
Engineering, Aerospace
Shahriar Dastjerdi, Mohammad Malikan, Victor A. Eremeyev, Bekir Akgoz, Omer Civalek
Summary: This research focuses on large deformations and stress analyses in two space structures intended for human habitation in space. Dynamic analysis based on the energy method, utilizing the first-order shear deformation shell theory and assuming a nonlinear von Karmen strain field, has been conducted. The study verified simulation efficiency through comparison with other research results and investigated important parameters influencing the numerical results in detail.
Article
Engineering, Civil
Huaiming Zhu, Peng Wang, Dong Wei, Jianfeng Si, Yaozhong Wu
Summary: A mapping method based on TPMS was proposed to construct LCS structures, and a D-LCS structure was designed. Experimental tests and finite element modeling were conducted to investigate the energy absorption performance of the D-LCS structure and the influence of design parameters. The results showed that the D-LCS structure exhibited superior energy absorption performances and that design parameters had a significant impact on its performance.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
V. Krasovsky, A. Evkin
Summary: The experimental studies on buckling of dented axially compressed unstiffened cylindrical shells show that the buckling behavior can be described by plateaus, and the lower local buckling loads are slightly influenced by geometric imperfections.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Peng Jiao, Zhiping Chen, He Ma, Hao Miao, Haiyang Ou
Summary: This paper investigates the buckling behavior of thin-walled cylindrical shell structures under localized axial compression loads and studies the influence of initial geometric imperfections on the buckling load using the finite element method. The effects of amplitude, distribution range, and different combinations of local dent imperfections are also elucidated. Additionally, the influence of inclined loading imperfections and uneven shell thickness distribution imperfections is analyzed through deterministic numerical simulations. A new buckling load knockdown factor is proposed to reasonably consider the influence of loading imperfections and shell thickness variation imperfections. This work provides useful guidance for the buckling design and prevention of buckling failure in thin-walled cylindrical shell structures under localized axial compression loads.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Mechanical
A. Lopatin, E. Morozov
Summary: This paper presents a novel solution to the free vibration problem of a shallow sandwich cylindrical panel with fully clamped edges, and derives an analytical formula for the fundamental frequency. The panel vibrations are modeled using engineering theory and solved using the Galerkin method, with approximate functions for the shape of the vibrating panel obtained from analysis of bending deformation of a clamped-clamped sandwich beam. The analytical formula is applied to calculate fundamental frequencies of sandwich panels with various structural parameters, successfully verified using the finite element method and implemented in the design analysis of sandwich panels.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Mechanical
Alexander Lopatin, Evgeny Morozov
Summary: This paper presents an analytical solution for the buckling problem of a composite cylindrical sandwich panel subjected to axial load. The study considers different boundary conditions and loading scenarios, utilizing engineering theory equations and numerical methods to derive a critical load formula. The formula is verified through finite-element analysis and demonstrates the influence of Poisson's effect on the buckling load value.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Mechanical
B. Aryal, E. Morozov, K. Shankar
Summary: This paper investigates the effects of ballistic impact damage on the mechanical behavior of composite honeycomb sandwich panels through ballistic tests and experimental analysis, evaluating the damage modes and extent using various methods. Structural performance of intact and damaged panels is studied through in-plane compression tests and numerical analysis, assessing the reduction in load-carrying ability caused by ballistic damage and comparing it with numerical simulations.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Caizheng Wang, Karthik Ram Ramakrishnan, Krishna Shankar, Evgeny Morozov, Hongxu Wang, Alan Fien
Summary: This study developed a macro-scale approach for studying the mechanical properties of stainless steel 304 wire mesh using a shell model, with material parameters determined from experimental tests. The comparison with experimental data and simulation results showed that the macro-scale model is more suitable for large-size simulations.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Mechanics
A. Lopatin, E. Morozov
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2020)
Article
Mechanics
A. Lopatin, E. Morozov, A. Shatov
Summary: This paper considers the buckling of a biaxially compressed anisogrid stiffened composite cylindrical panel with clamped edges. The analysis is based on modeling and using the engineering theory to derive an analytical formula for the critical compressive buckling load. The results of calculations have been verified by finite-element analyses.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Engineering, Mechanical
A. Lopatin, E. Morozov
Summary: This work proposes an efficient method to calculate the fundamental frequency of a corner-supported composite sandwich plate with a lumped mass at its center. The method combines the Hamilton principle and the Rayleigh-Ritz method to solve the dynamic problem of the panel. The results were successfully verified through comparisons with finite-element computations, demonstrating the efficiency of the proposed methodology.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Civil
Caizheng Wang, Hongxu Wang, Krishna Shankar, Evgeny V. Morozov, Paul J. Hazell
Summary: The study investigated the dynamic mechanical response of steel wire mesh subjected to low-velocity impact loading using experimental and numerical methods. Factors such as impact energy, impactor's mass and size, and strength differences between weft and warp wires were found to influence the extent of damage and mechanical performance of the wire mesh specimens under different loading conditions. Experimental results revealed that peak contact force increased with impact energy until wire breakage occurred, after which the peak force remained almost unchanged.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
A. Lopatin, E. Morozov
Summary: The study investigated the buckling behavior of an orthotropic composite plate on an elastic orthotropic foundation with nonlinear transverse displacement, proposing a new model for more accurate calculation of critical buckling load, which yielded lower values compared to the traditional model. The finite element analysis confirmed the validity of the calculations, showing that the proposed model enables more accurate determination of critical load.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Physical
Jianshen Wang, Daniel East, Evgeny Morozov, Aaron Seeber, Juan P. Escobedo-Diaz
Summary: Ti-Ni-C functionally graded composites were fabricated using a LENS(TM) additive manufacturing system, showing that the phase constitution, microstructure, and hardness of the composites gradually change with chemical composition. The addition of Ni coated graphite increases the density and changes the morphology of in-situ synthesised TiC precipitates, leading to an increase in hardness of the graded composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Multidisciplinary
Hongxu Wang, Dakshitha Weerasinghe, Paul J. Hazell, Damith Mohotti, Evgeny V. Morozov, Juan P. Escobedo-Diaz
Summary: This study investigates the impact behavior of UHMWPE textile composites under different matrix rigidities. Experimental and numerical methods were used to analyze the mechanical properties. It was found that the composites changed from membrane stretching mode to plate bending mode as the matrix rigidity and thickness increased. The flexible matrix composites had higher perforation resistance but larger deformation compared to the rigid matrix counterparts.
DEFENCE TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Matthew J. Donough, B. Gangadhara Prusty, Mitchell J. Van Donselaar, Evgeny V. Morozov, Hongxu Wang, Paul J. Hazell, Andrew W. Philips, Nigel A. St John
Summary: This work investigated the damage in thick glass-fibre/epoxy laminates caused by low velocity impacts. Experimental and numerical results showed that the impact damage was localized in the vicinity of the impactor contact area and included an interplay of various damage mechanisms. The highest impact damage resistance was obtained with the 0 degrees (in-plane) specimen due to the alignment of fibers to the impact loading direction.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Jianshen Wang, Daniel East, Evgeny V. Morozov, Hongxu Wang, Paul J. Hazell, Juan P. Escobedo-Diaz
Summary: This study investigated the mechanical response, microstructures, and failure mechanisms of additively manufactured Ti matrix composites with Ti2Ni and TiCx reinforcements under various loading rates. The results showed that the mechanical properties of the composites changed with the NCG fraction. The failure mechanisms involved tensile fracture of TiCx precipitates and shear of the Ti matrix. Composites with higher NCG content exhibited increased strength, reduced ductility, and lower strain rate sensitivity. The Ti-Ni-C composite showed enhanced strength without compromising ductility under high strain rate compression loading, making it a promising material for impact load applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
