Article
Polymer Science
Yang Wei, Shuaifeng Tang, Si Chen, Qiudong Wang, Jiaqing Wang
Summary: This paper proposes a new type of polyurethane foam-filled bamboo composite tube and conducts experimental research on it. The results show that the foam filler can enhance the stability and bearing capacity of the tube, but not all foam-filled tubes are superior to unfilled tubes. Reducing the height of the bamboo composite tube and increasing the number of winding layers can effectively increase the positive effect of the foam filler on energy absorption.
Article
Engineering, Civil
Li Wang, Boyi Zhang, Jian Zhang, Yuexin Jiang, Wei Wang, Gaohui Wu
Summary: In this study, the performance and influencing factors of cenosphere-aluminum syntactic foam-filled tubes in compression tests were investigated, revealing the restraining effect of the tube wall on the filler and the impact of tube wall thickness on specific energy absorption. The interaction between the tube wall and filler was found to enhance the load-bearing capacity and plastic deformation ability of the syntactic foam-filled tubes.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Mojtaba Gorji Azandariani, Tohid Ghanbari-Ghazijahani, Amin Mohebkhah, Martin Classen
Summary: CTFSTs have gained popularity due to the high compressive strength of timber and their potential as a green alternative to concrete. This study conducted numerical and analytical research on the performance of composite columns, with very consistent results compared to experimental data in the literature.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Materials Science, Composites
Cuiping Bai, Qihua Ma, Xuehui Gan, Tianjun Zhou
Summary: This study investigates the theoretical prediction of mean crushing force of CFRP-Al hybrid circular tubes with different winding angles under axial compression, and provides insights for the design of composite-metal hybrid thin-walled tube.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Composites
Xiaoyu Qin, Qihua Ma, Xuehui Gan, Cuiping Bai
Summary: A multi-cell hybrid thin-walled tube (MCHT) structure was proposed to achieve excellent crushing performance by adjusting the structural parameters. The influence of different parameters on the structure was studied using a finite element model, and a theoretical prediction model for crushing force was established.
POLYMER COMPOSITES
(2022)
Article
Mechanics
Xiwei Wu, Jianxun Zhang
Summary: This paper studies the axial crushing behaviors of metal density gradient foam-filled square taper tubes through theoretical and numerical analysis. An analytical model is proposed to study the interaction between the square taper tube and the foam. The influences of taper angle, foam strength, maximum relative density, and minimum relative density of gradient foam on the compressive behavior are considered.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2023)
Article
Mechanics
Bingquan Lu, Junyuan Zhang, Danfeng Zheng, Jian Xie, Tianqi Zhang, Le Zhang
Summary: This paper proposes a theoretical model to predict the mean crushing force of hybrid multi-cell tubes and studies the effects of the number of cells on their deformation mode. The accuracy of the model is verified by experimental results. The study shows that the decrease in half-wave length and the increase in membrane force are the main factors causing the hybrid multi-cell tubes to deform in a mixed mode.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Construction & Building Technology
Yanjun Chang, Wanli Chen, Quan Xiao, Enchao Rong, Linxin Peng
Summary: This study investigates the mechanical properties of concrete-filled tube columns under axial compression with a wider range of confinement factors. The results show that the ultimate axial compressive strength of the concrete-filled tubes increases as the confinement factor ascends, particularly in columns with higher confinement factors where a secondary strengthening effect is observed. The study provides insights on the behavior of CFST columns under different levels of confinement factors.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Chemistry, Physical
Zhanguang Wang, Jianhua Shao
Summary: This paper studies the axial compression performance of aluminum foam-filled steel tube and empty steel tube through experimental research. The carrying capacity, deformation behavior, stress distribution, and energy absorption characteristics of these tubes are compared using finite element numerical simulation. The results show that the aluminum foam-filled steel tube still has a large residual carrying capacity after the ultimate load, and the compression process is steady-state. The axial and lateral deformation of the foam-filled steel tube decreases significantly, and the energy absorption capacity improves after filling with foam metal.
Article
Mechanics
Chengxing Yang, Zhifang Chen, Shuguang Yao, Ping Xu, Shunfeng Li, Mohammed S. Alqahtani
Summary: Composite structures combining CFRP, Al, and PU foam were tested for compression and impact performance, showing that they exhibited more stable deformation mode, higher energy absorption, and better crashworthiness compared to single materials. Among the tested combinations, CFRP-PU-CFRP showed the best energy absorption performance.
COMPOSITE STRUCTURES
(2022)
Article
Polymer Science
Kunting Miao, Yang Wei, Xi Zhang, Kaiqi Zheng, Fenghui Dong
Summary: The new CFGCT column structure composed of stress-released steel tube, FRP, and concrete showed improved bearing capacity and simplified mechanical mechanism. Formulas for calculating ultimate stress, ultimate strain, peak stress, and peak strain were proposed based on test results, and models for predicting stress-strain curves of CFGCT columns accurately simulated the behavior of this new composite structure.
Article
Engineering, Civil
James St Onge, Amir Fam
Summary: This study investigated the performance of concrete-filled fiber-reinforced polymer (FRP) tubes under combined torsion and axial compression. The results showed that the torsional capacity increased with small-to-moderate levels of axial compression, but decreased after reaching a balanced point. The maximum torque increased with effective axial stresses of 0.45f'(c) and 0.65f'(c), and reduced to a value similar to pure torsion at 0.85f'(c). Failures occurred from sudden rupture of the FRP tube near a concrete crack location at high levels of twist.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Nima Movahedi, Emanoil Linul
Summary: This research investigates the mechanical properties and deformation mechanisms of foam-based composites under radial compressive loadings at different temperatures. The study found that aluminum foams do not show shear failure in the early stages of their deformation at room temperature, and that empty tubes do not progress through successive folding during radial compression. The interaction effect between tubes and foams is observed at all testing temperatures.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Weimin Zhuang, Enming Wang, Ditong Zhang, Hailun Zhang
Summary: This study investigates the axial compression mechanics and energy absorption characteristics of aluminum foam-filled carbon fiber-reinforced polymer (CFRP) tubes through experimental and simulation approaches, exploring the effects of structural parameters.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Civil
Xiaozhong Li, Sumei Zhang, Wei Lu, Jian Li
Summary: This paper investigates the influence of critical parameters on the axial compressive behavior of T-CFST stub columns through experimental study. The results show that T-CFST can prevent shear failure and significantly improve compressive strength.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Abbas Barati, Amin Hadi, Mohammad Zamani Nejad, Reza Noroozi
Summary: This article investigates the transverse vibrations of bi-directional functionally graded nanobeams subjected to a longitudinal magnetic field. The nonlocal elasticity theory and the generalized differential quadrature method are used to obtain the equations of motion and boundary conditions, and the effect of different parameters on vibration is studied.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Materials Science, Composites
Azadeh Fathi, Gholamhossein Liaghat, Hadi Sabouri, Mahmoud Chizari, Homayoun Hadavinia, Sahand Chitsaz Charandabi
Summary: The study showed that adding 0.2 wt% GNPs can delay the failure modes, improve the strength and fracture toughness of specimens, but weaken the bonding between aluminum and composite interface.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2021)
Article
Engineering, Biomedical
Ali Kabiri, Gholamhossein Liaghat, Fatemeh Alavi, Mehdi Ansari, Seyyed Kaveh Hedayati
Summary: The new Glass Fiber/Polypropylene composite internal fixations show potential in supporting bone healing and can replace traditional metallic plates.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE
(2021)
Article
Engineering, Mechanical
Mohammad Mahdi Abedi, Reza Jafari Nedoushan, Woong-Ryeol Yu
Summary: A new ultralight hybrid material composed of braided lattice composite tubes and polyurethane foam was developed in this study. Experimental characterization and finite element modeling showed that the hybrid composites exhibited significantly improved energy absorption properties, outperforming similar ultralight cellular structures in terms of crashworthiness.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Materials Science, Composites
Amirreza Tarafdar, Omid Razmkhah, Hamed Ahmadi, Gholamhossein Liaghat, Sahand Chitsaz Charandabi, Moslem Rezaei Faraz
Summary: The influence of layering design and stacking sequence on the crush behavior and energy absorption capacity of bamboo-inspired composite tubes was assessed in this study. The combination of woven and unidirectional fibers in specific layering configuration was found to improve the crushing performance and manufacturing quality of the composite tubes.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2022)
Article
Materials Science, Composites
Mohammad Amin Zarezadeh-mehrizi, Gholamhossein Liaghat, Hamed Ahmadi, Alireza Taherzadeh-Fard, Amin Khodadadi
Summary: This study investigates the effects of elastomers on fiber metal laminates (FMLs) under low-velocity impact loads. The addition of an elastomeric layer to conventional FMLs enhances structural toughness, pre-fracture deformation, and specific energy absorption, while reducing damage and maximum load. Placing the elastomer closer to the frontal face decreases maximum load and energy absorption capacity.
POLYMER COMPOSITES
(2022)
Article
Mechanics
Seyedeh Samaneh Asemani, Gholamhossein Liaghat, Hamed Ahmadi, Yavar Anani, Sahand Chitsaz Charandabi, Amin Khodadadi
Summary: This study proposes a new theoretical model for high-velocity impact in Kevlar/elastomer and Kevlar/epoxy composites, and compares them. The results show that the adhesion of Kevlar fibers to the rubber matrix is stronger, leading to higher ballistic velocity in elastomeric composites.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Materials Science, Composites
Seyed Abolghasem Goudarzi, Abbas Niknejad, Fatemeh Heidari
Summary: This study discusses the penetration resistance, compression strength, and energy absorption characteristics of Luffa fibers-chitosan resin composite materials, and suggests further development of natural composites for use in bulletproof vests and armor.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Engineering, Chemical
Zahra Nazari, Hamed Ahmadi, Gholamhossein Liaghat, Samireh Vahid
Summary: This article investigates the impact of fabrication process parameters on the microstructure and compression behavior of polyurethane auxetic foam. The results show that the auxeticity of the foam can be maximized through specific processing conditions and leads to increased energy absorption capabilities.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Materials Science, Composites
Mostafa Nouraei, Gholamhossein Liaghat, Hamed Ahmadi, Ahmad Reza Bahramian, Alireza Taherzadeh-Fard, Samireh Vahid
Summary: This study investigates the mechanical characteristics of a novel natural rubber-based elastomer nanocomposite reinforced with carbon black and alumina nanoparticles. It is found that the addition of alumina nanoparticles improves the vulcanization properties of the elastomer nanocomposite, and the optimal weight percentage of nanoparticles is determined to be 10%. The material shows high stiffness and energy absorption capacity under high strain-rate loading, making it a promising candidate for energy absorption applications.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2022)
Article
Materials Science, Composites
Ehsan Pedram, Hamed Ahmadi, Ali Kabiri, Mehran Ghalami Choobar, Omid Razmkhah, Neil Fellows, Gholamhossein Liaghat
Summary: This article investigates the energy absorption and failure behavior of thermoplastic composite sandwich panels made entirely of polypropylene (PP) and pin-reinforced core under quasi-static compressive loading. FEM analysis and a closed-form analytical model are used to predict the critical load of these structures. The results demonstrate that the predictions accurately capture both the critical failure load and failure mechanisms. The peak load and specific energy absorption (SEA) are highest for the cubic reinforced foam-core sandwich panel.
POLYMER COMPOSITES
(2023)
Article
Engineering, Multidisciplinary
M. Dehghan, A. Moosaie, M. Z. Nejad
Summary: The study pioneers the combination of Fast Fourier Transform (FFT) and p-version of finite element method for the analysis of a thick hollow cylinder under asymmetric thermal loadings, leading to a significant decrease in computational costs. The effects of FFT grid-size and the order of the interpolation functions on the convergence behavior of the proposed mixed FFT-pFE method are investigated.
Article
Mechanics
Tahereh Taghizadeh, Mohammad Zamani Nejad
Summary: In this study, the time-dependent thermo-elastic creep behavior and life assessment of rotating thick-walled cylindrical shells made of 304L austenitic stainless steel were investigated using the third-order shear deformation theory (TSDT) and Norton's law. The accuracy of the analytical method based on TSDT was validated by comparing results with finite element method (FEM), showing good agreement. The results indicate that the analysis is accurate and computationally efficient.
JOURNAL OF COMPUTATIONAL APPLIED MECHANICS
(2021)
Article
Construction & Building Technology
Maryam Emadi, Mohammad Zamani Nejad, Sima Ziaee, Amin Hadi
Summary: This paper investigates the buckling analysis of nanoplates made of arbitrary BDFG materials using Eringen's nonlocal theory, and employs the GDQM to solve governing equations for obtaining buckling loads. The numerical results demonstrate the accuracy of GDQ method in analyzing buckling behavior of nano FGM plates.
STEEL AND COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Tayebeh Ebrahimi, Mohammad Zamani Nejad, Hamid Jahankohan, Amin Hadi
Summary: An analytical solution is presented to analyze the thermoelastoplastic response of a rotating thick-walled cylindrical pressure vessel made of functionally graded material (FGM). The study shows that the thermoelastoplastic stress response of a rotating FGM pressure vessel is significantly affected by the nonhomogeneity of the material and temperature gradient.
STEEL AND COMPOSITE STRUCTURES
(2021)