Review
Computer Science, Interdisciplinary Applications
Shengli Kong
Summary: The article discusses the size-dependent material deformation behaviors of certain metals and polymers at micro scale experiments and how the modified couple stress theory (MCST) can capture these size dependences. It reviews available size-dependent models for micro-beam and micro-plate based on MCST, and establishes relevant mechanical models and solutions for static bending, vibration, buckling, and pull-in instability of representative micro-structures. The results indicate significant size effects on the mechanical properties of micro-structures, suggesting potential further research on size-dependent behaviors.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2022)
Article
Acoustics
J. Ranjan Banerjee, Stanislav O. Papkov, Thuc P. Vo, Isaac Elishakoff
Summary: Several models based on continuum mechanics have been proposed to solve the free vibration problem of micro beams. This paper focuses on the modified couple stress theory in conjunction with the Timoshenko-Ehrenfest theory to study the free vibration characteristics of micro beams. The main advantage of the modified couple stress theory is its use of only one material length scale parameter. The results demonstrate the effects of the length scale parameter on the free vibration characteristics of Timoshenko-Ehrenfest micro beams.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Chemistry, Multidisciplinary
Gang Zhao, Mostafa Hooman, Mahdireza Yarigarravesh, Mohammed Algarni, Maria Jade Catalan Opulencia, Fahad Alsaikhan, Abduladheem Turki Jalil, Abdullah Mohamed, Kareem M. AboRas, Md Lutfor Rahman, Mohd Sani Sarjadi
Summary: In this manuscript, the effects of agglomeration on the vibration of fiber metal laminated (FML) cylindrical shell in the micro phase using developed couple stress theory (MCST) were investigated. The non-classical equations of motion were derived based on Love's first approximation theory. The study analyzed the frequency response of a micro agglomerated CNTFPML cylindrical shell under various input parameters. The results showed that the frequencies were directly dependent on the increase of material length scale parameter and the agglomeration parameters.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Gang Zhao, Mostafa Hooman, Mahdireza Yarigarravesh, Mohammed Algarni, Maria Jade Catalan Opulencia, Fahad Alsaikhan, Abduladheem Turki Jalil, Abdullah Mohamed, Kareem M. AboRas, Md. Lutfor Rahman, Mohd Sani Sarjadi
Summary: This study investigates the effects of agglomeration on the vibration of fiber metal laminated cylindrical shells using couple stress theory, showing that the increase in frequency is directly related to the increase in material length scale parameter.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Mechanics
E. Kormanikova, K. Kotrasova
Summary: This article explores the method of using micro-macro modeling for seismic response calculation in a composite rectangular tank filled with liquid.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Abbas Rahi
Summary: The modified couple stress theory (MCST) is applied to investigate the size effect on dynamic response of multiple-layer microbeams in this study. Governing equations are derived using MCST and Hamilton's principle, followed by analytical calculation of natural frequencies. The results highlight the significant influence of material length-scale parameters and dimensions of each layer on the vibration characteristics of multiple-layer microbeams.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Mathematics, Applied
Amir R. Askari, Jan Awrejcewicz
Summary: This paper develops a size-dependent large deformable model based on the modified couple stress theory to study the flexural-flexural quasi-static motion of cantilever-based micro-gyroscopes. The model successfully captures the stable and unstable branches of the micro-gyroscope equilibrium paths. Experimental verifications confirm the accuracy and feasibility of the model.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Mechanics
Y. S. Joshan, L. K. Sharma, Neeraj Grover, R. K. Godara
Summary: In this article, couple stress models in the non-polynomial framework are developed and used to examine the structural response characteristics of composite micro-plates. The study considers length scale effects and various shear shape functions to model transverse shear deformation effects, with governing equations formulated using the Hamilton principle and linear structural kinematics. The methodology is applied to analyze bending, free vibration, and buckling responses of the micro-plates, with comparisons made among different plate theories to assess the applicability of various deformation theories in modeling composite micro-plates.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Cancan Liu, Jiangong Yu, Weijiang Xu, Xiaoming Zhang, Xianhui Wang
Summary: This paper studies the acoustic wave motion characteristics of Lamb and SH waves in FG anisotropic micro/nano-plates based on the modified couple stress theory, using the efficient LOPM method for solving process and examining the effects of size and material gradient. The research indicates that size effect causes wrinkles in Lamb wave dispersion curves, material gradient changes the amplitude and range of wrinkles, and length scale parameter influences the cut-off frequency of SH waves.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
Chunwei Zhang, Arameh Eyvazian, Mohammad Alkhedher, Mamdooh Alwetaishi, N. Ameer Ahammad
Summary: The current study focuses on the mechanical buckling analysis of a three-layered microplate consisting of honeycomb structures sandwiched between two piezoelectric face sheets. The study considers the effective mechanical properties of the honeycomb core and the influence of geometric specifications. The findings have importance in designing and manufacturing more applicable structures and smart devices.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Sayed Mohamad Mirfatah, Mohammad Amin Shahmohammadi, Hamzeh Salehipour, Omer Civalek
Summary: This work aims to evaluate the dynamic stability of micro-shell panels enriched by nanocomposites using an analytical approach. The modified couple stress theory is utilized to account for the size effects on the mechanical behavior of the micro-shell panels. The fundamental equations, based on the first-order shear deformation theory, are solved using the Galerkin method to obtain a closed-form solution for evaluating the dynamic stability of the proposed micro-shell panels. Comparative studies and a parametric study are conducted to validate the accuracy of the proposed method and investigate the effects of the material length scale parameter on the dynamic stability of the micro-shell panels.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Mechanics
Richa Priyanka, Jeyaraj Pitchaimani
Summary: This paper investigates the buckling and free vibration behaviors of micro laminated composite beams under varying axial loads using the modified couple stress theory, capturing the size effect by considering material length scale parameters and exploring different boundary conditions and layups. The observed size effect is more significant when the beam thickness is similar to the material length scale parameter and diminishes as the thickness increases. Different boundary conditions result in varying small size effect variations, with the fundamental frequency decreasing more rapidly under parabolic loading compared to other loading types.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Maryam Lori Dehsaraji, Mohammad Arefi, Abbas Loghman
Summary: This paper employs higher-order shear and normal deformation theory to analyze the free vibration of cylindrical micro/nano shells, taking into account thickness stretching effect and size dependency. Numerical results are used to investigate the impact of geometric parameters, material properties, applied voltages, and temperature rising on the free vibration responses.
DEFENCE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Hamid M. Sedighi, Ahmed E. Abouelregal, S. Ali Faghidian
Summary: This study investigates the deficiency of the modified couple stress theory in accurately describing the material response of continua with nano-structural features. By reassessing the flexure mechanics of nano-scale beams within this theory, physically motivated constitutive laws are introduced and the effects of symmetric rotation gradients and transverse shear deformation are examined. Additionally, closed-form analytical formulae for the elastic modulus of Carbon Nanotubes are derived and the applicability of the modified couple stress beam model in accurately capturing size-effects in nano-materials is rigorously examined.
Article
Engineering, Multidisciplinary
Jun Song, Didi Wu, Mohammad Are
Summary: This paper investigates the electromagnetoelastic static properties of a sandwich doubly curved microshell subjected to multi-field loading. A refined higher order shear/normal deformable model is used, and the effect of small scale parameter on the bending results is studied.
DEFENCE TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
M. Rahaeifard, M. T. Ahmadian, K. Firoozbakhsh
APPLIED MATHEMATICAL MODELLING
(2015)
Article
Engineering, Multidisciplinary
M. Rahaeifard, M. T. Ahmadian
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2015)
Article
Mechanics
M. Mojahedi, M. Rahaeifard
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2015)
Article
Engineering, Multidisciplinary
M. Rahaeifard
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2016)
Article
Engineering, Multidisciplinary
M. Mojahedi, M. Rahaeifard
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2016)
Article
Engineering, Biomedical
E. Yassini, M. Mirzaei, A. Alimi, M. Rahaeifard
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2016)
Article
Engineering, Multidisciplinary
M. Rahaeifard, M. Mojahedi
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2017)
Article
Engineering, Civil
M. Rahaeifard, M. Mojahedi
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2017)
Article
Engineering, Civil
A. Karimzadeh, M. T. Ahmadian, K. Firoozbakhsh, M. Rahaeifard
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2017)
Article
Thermodynamics
S. Zandekarimi, B. Asadi, M. Rahaeifard
JOURNAL OF THERMAL STRESSES
(2018)
Article
Engineering, Multidisciplinary
M. H. Kahrobaiyan, M. Rahaeifard, M. T. Ahmadian
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2014)
Article
Engineering, Multidisciplinary
M. Rahaeifard, M. T. Ahmadian, K. Firoozbakhsh
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2014)
Article
Engineering, Mechanical
Masoud Rahaeifard, Mohammad Taghi Ahmadian, Keikhosrow Firoozbakhsh
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2014)
Article
Engineering, Multidisciplinary
A. Karimzadeh, M. T. Ahmadian, M. Rahaeifard
Article
Engineering, Multidisciplinary
Keyu Zhu, Xitao Zheng, Jing Peng, Jiaming Sun, Ruilin Huang, Leilei Yan
Summary: This paper discusses the influence of multiple impacts on the compression strength of honeycomb sandwich structures with composite face sheets. It is found that the size of the impactor affects the turning point of the compression strength. Additionally, high impact energy leads to damage in the bottom face sheet and reduces the overall compression strength.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Danqian Wang, Yanfei Yue, Jueshi Qian
Summary: Magnesium Potassium Phosphate Cement (MKPC) as a binder for steel rebars shows improved corrosion resistance when subjected to carbonation, due to the increase in pH and the formation of a more protective oxide film.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhibin Li, Wenyu Wang, Pengcheng Xue, Xingyu Wei, Jian Xiong
Summary: This work proposes a design approach and manufacturing method for carbon fiber reinforced plastic (CFRP) corrugated sandwich truncated cones (CSTC) to improve their anti-debonding ability and ensure reliability. The study establishes theoretical models for CSTCs' stiffness and failure modes, which are verified through experiments and finite element analysis (FEA). The research reveals the effect of geometric parameters on failure modes and performs an optimal design for CSTC structures. The findings have significant implications for the design and application of lightweight CSTCs in constructions, such as launch vehicle adapters.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mingyu Zhang, Lei Chu, Jiahua Chen, Fuxun Qi, Xiaoyan Li, Xinliang Chen, Deng-Guang Yu
Summary: This review summarizes the different structures and construction methods of fibrous membranes with asymmetric wettability. It also reviews the biological applications of these membranes and suggests future challenges.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
E. Mofakhami, L. Gervat, B. Fayolle, G. Miquelard-Garnier, C. Ovalle, L. Laiarinandrasana
Summary: This study investigates the effects of fibre concentration on the mechanical response of welded glass-fibre-reinforced polypropylene (GF-PP). Experimental observations reveal a significant reduction in weld ratio, up to 60%, indicating a decreased strength compared to the bulk material. Increasing fibre content in the welded material results in a decrease in stress at break and strain at the maximum stress. The use of DIC technique and X-ray microtomography further confirms the localized strain amplification in the welded zone due to the significant increase in fibre density.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Johnny Jakobsen, Benny Endelt, Fahimeh Shakibapour
Summary: This study proposes a new bolted/pinned joining method for composite applications, which improves load transfer by introducing a patch-type reinforcement. Experimental results demonstrate significant improvements in both static and fatigue load conditions compared to existing methods. Finite element simulations highlight the advantage of this method, as it creates a more efficient load-transferring mechanism through different stress distributions.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper proposes a novel approach to assess multi-crack behavior in layered fiber-polymer composites. The generated Compliance and R-curves provide useful insights into understanding the multiple delamination process and allow for separate evaluation of strain energy release rate (SERR) for each crack. The developed cohesive zone model successfully simulates the failure process zone of three parallel cracks, showing good agreement between the numerical model and experimental results.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Renil Thomas Kidangan, Sreedhar Unnikrishnakurup, C. Krishnamurthy, Krishnan Balasubramaniam
Summary: The induction heating process can accurately identify fiber orientation and stacking order, making it a valuable tool for large-area inspection and quality control in manufacturing fiber-reinforced composites.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mehdi Mahdavi, Abbas Zolfaghari
Summary: This study aims to improve the recovery forces of shape memory polymers (SMPs) through material extrusion additive manufacturing. By using glass fiber (GF) as reinforcement and manufacturing multi-layer composite specimens, it was found that PLA with 6.62% GF exhibited the best recovery force, which was further optimized through annealing heat treatment.
COMPOSITES PART B-ENGINEERING
(2024)
Review
Engineering, Multidisciplinary
Xiang Ao, Antonio Vazquez-Lopez, Davide Mocerino, Carlos Gonzalez, De-Yi Wang
Summary: The vulnerability of natural fibers to heat and fire poses a significant challenge for their substitution of traditional fiber reinforcements in composite materials. Natural fiber/polymer composites (NFCs) are regarded as potential candidates for engineering applications due to their environmental friendliness and low-impact sourcing. Thus, appropriate approaches need to be implemented to enhance the fire safety of NFCs. This review summarizes and discusses the latest understanding of flammability and thermal properties of natural fibers, with a special focus on their interaction with polymer matrix in fire behavior. Additionally, the latest developments in flame-retardant approaches for NFCs are reviewed, covering both flame retardancy and fire structural integrity. Finally, future prospects and perspectives on fire safety of NFCs are proposed, providing insights into further advancements of NFCs.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Cheng Wang, Siqi Huo, Guofeng Ye, Bingtao Wang, Zhenghong Guo, Qi Zhang, Pingan Song, Hao Wang, Zhitian Liu
Summary: The demand for multifunctional, transparent epoxy resin with superior dielectric, mechanical, and fire-safety performances is increasing in modern industries. Researchers have developed an epoxidized, phosphaphenanthrene-containing poly(styrene butadiene styrene) (ESD) for advanced fire-safe epoxy resin, which maintains high transparency and improves UV-blocking property. The addition of 10 wt% ESD results in improved mechanical properties, decreased dielectric constant and loss, and outperformance compared to other fire-safe epoxy resins. This research provides an effective method for developing multifunctional flame-retardant epoxy resin.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bo Pang, Heping Zheng, Zuquan Jin, Dongshuai Hou, Yunsheng Zhang, Xiaoyun Song, Yanan Sun, Zhiyong Liu, Wei She, Lin Yang, Mengyuan Li
Summary: This study develops an internal superhydrophobic material (ISM) using waste denitrification fly ash, which maintains stable hydrophobicity under harsh conditions of use and does not rely on expensive fluor-based surface modifications. The synthesized ISM has excellent matrix strength, strong waterproof properties, and retains superhydrophobicity even at damaged or friction interfaces.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Meirbek Mussatayev, Qiuji Yi, Mark Fitzgerald, Vincent K. Maes, Paul Wilcox, Robert Hughes
Summary: Real-time monitoring of carbon fibre composites during Automated Fibre Placement (AFP) manufacturing remains a challenge for non-destructive evaluation (NDE) techniques. This study designed a directional eddy-current (EC) probe to evaluate the detectability of out-of-plane wrinkles. Experimental evaluations and finite element modeling were conducted to better understand the relationship between eddy-current density and defect detection. The findings suggest that the probe configuration with an asymmetric driver coil and differential pickup coils shows the best capability for wrinkle detection.
COMPOSITES PART B-ENGINEERING
(2024)
