Article
Mechanics
M. C. Kiran
Summary: The current article investigates the thermo-mechanical buckling behavior of porous functionally graded (FG) plates of rectangular and skew geometry. The modified rule of mixture and power law distribution are incorporated to establish the governing equations, and finite element meshing is introduced using four node rectangular elements. The stability analysis is performed by computing the critical buckling load for structures subjected to compressive and thermal loads, and the impact of various parameters on the stability characteristics is thoroughly investigated.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
Abdelhak Zohra, Rabia Benferhat, Hassaine Daouadji Tahar, Abdelouahed Tounsi
Summary: A new simple solution for critical buckling of FG sandwich plates under axial and biaxial loads is presented using new modified power-law formulations. The study considers both even and uneven distributions of porosity in the sandwich plates. Results show that the distribution shape of the porosity, the gradient index, loading type, and functionally graded layers thickness significantly influence the buckling response of functionally graded sandwich plates.
STRUCTURAL ENGINEERING AND MECHANICS
(2021)
Article
Computer Science, Interdisciplinary Applications
M. Esmaeilzadeh, M. E. Golmakani, Y. Luo, M. Bodaghi
Summary: This paper investigates the dynamic behaviors of a sandwich plate with an imperfect two-dimensional functionally graded (2D-FG) core under a moving load. The effects of various factors on the transient performance of the plate are studied through numerical simulations.
ENGINEERING WITH COMPUTERS
(2023)
Article
Construction & Building Technology
Fatemeh Abbaspour, Hadi Arvin
Summary: This paper investigates the buckling analysis of functionally graded graphene platelets micro plates with piezoelectric layers under external applied voltage. The study shows that the distribution pattern of graphene platelets has minimal effect on thermal buckling strength, while mechanical buckling strength is improved. Additionally, negative and positive voltages have significant effects on the stability and critical buckling load of the micro plate.
STEEL AND COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Mojtaba Farrokh, Mohammad Taheripur, Erasmo Carrera
Summary: This paper investigates the thermal buckling of metal-ceramic functionally graded plates, and formulates the problem using a higher-order plate theory and linearized buckling analysis method. The optimization results show that the degrees of freedom associated with the composition distribution have a significant influence on the critical buckling temperature of the plate.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Thom Van Do, Duc Hong Doan, Nguyen Chi Tho, Nguyen Dinh Duc
Summary: This study investigates the thermal buckling of fractured functionally graded material plates using a phase-field model, demonstrating the difference in static stability response based on temperature-dependent and temperature-independent material mechanical properties. The research provides valuable information for scientists to choose the most accurate computation model.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Chemistry, Multidisciplinary
Faraz Kiarasi, Masoud Babaei, Kamran Asemi, Rossana Dimitri, Francesco Tornabene
Summary: The study investigates the buckling behavior of functionally graded porous rectangular plates under various loading conditions using the FE-GDQ method and Biot's constitutive law. A parametric analysis is conducted to examine the sensitivity of porous structures to different input parameters, providing valuable conclusions for engineering structural design.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Feixiang Tang, Fang Dong, Yuzheng Guo, Shaonan Shi, Jize Jiang, Sheng Liu
Summary: This study investigates the buckling and post-buckling problems of size-dependent functionally graded material thin plates using the framework of the Modified Couple Stress Theory. By considering the power-law distribution with scale effects, the post-buckling deflection and critical buckling load of the plates are derived. It is found that the power-law index parameters have a significant influence on the critical buckling displacement, load, and strain energy, while the scale effect parameter has a greater impact. Additionally, the results show that the scale effects increase material stiffness and that the power-law index parameters affect FGM properties.
Article
Mechanics
Supen Kumar Sah, Anup Ghosh
Summary: This article investigates the free vibration and buckling of multi-directional porous FGM sandwich plates, obtaining equilibrium equations based on sinusoidal shear deformation theory and using Navier's solution technique for simply supported cases. Different porous distribution models are considered for the FGM face sheets, and the influence of various factors on the natural frequency and critical buckling load of the sandwich plate is analyzed.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Aref Mehditabar, Saeid Ansari Sadrabadi, Jason Walker
Summary: This study investigates the thermal buckling responses of a functionally graded cylindrical microshell. The material properties of the microshell are graded through the thickness based on a simple power-law distribution. The governing equations and boundary conditions are derived using higher-order shear deformation theory. The size dependence of the microshell is characterized using the modified couple stress theory. Two types of differential quadrature method are employed to solve the equations and obtain the critical buckling temperature. The numerical technique shows fast convergence and is validated against available data. Parametric studies are conducted to analyze the influence of various factors on the critical buckling temperature.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Mechanics
Abdelouahab Tati
Summary: The buckling behavior of functionally graded rectangular plates under mechanical and thermal loading are investigated using a four-node finite element based on a simple high-order shear deformation theory. The proposed model eliminates the need for shear correction factors by introducing the assumed natural shear strain technique to reduce shear locking phenomenon. The study also considers the effects of different factors on the buckling behavior of the plates.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Engineering, Civil
Supen Kumar Sah, Anup Ghosh
Summary: This work investigates the impact of porosity distributions on the thermal buckling analysis of functionally graded material (FGM) sandwich plates. Different distribution models and thermal loads are considered. Effective material properties and thermal expansion coefficients of FGM sandwich plates are evaluated using Voigt's micromechanical model. The analytical solution is obtained using Hamilton's variational principle and the equilibrium and stability equations are derived based on sinusoidal shear deformation theory (SSDT).
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Mechanics
Amir Masoud Allah Gholi, Ahmad Reza Khorshidvand, Mohsen Jabbari, S. Mahdi Khorsandijou
Summary: This research investigates the frequency response of a functionally graded porous material annular plate with two piezo-electro-magnetic layers. By integrating the functionally graded porous material with stiffer materials, the low stiffness limitation can be overcome, making it applicable in various engineering structures. The effects of different parameters on the natural frequencies of the plate are discussed.
Article
Engineering, Civil
V. Kumar, S. J. Singh, V. H. Saran, S. P. Harsha
Summary: This work investigates the buckling response of a porous plate made of functionally graded materials. It considers a tapered FGM plate under uniaxial and biaxial loading with various boundary conditions. The effects of Pasternak foundation and different porosity patterns on the buckling response are studied. The study utilizes the first order-shear deformation theory and the Galerkin's-Vlasov method to derive the effective equations of motion for buckling analysis.
Article
Mechanics
Abdelbasset Chedad, Noureddine Elmeiche, Souad Hamzi, Hichem Abbad
Summary: This document studies the effect of porosity on the buckling of functionally graded sandwich plates under a nonlinear thermal loading. The four-variable refined plate theory is utilized, and various types of functionally graded material sandwich plates are considered. The study highlights the influence of transverse shear and compares the proposed model with other works reported in the literature.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Computer Science, Interdisciplinary Applications
Duong Huong Nguyen, Magd Abdel Wahab
Summary: This paper proposes a novel method based on the 2D curvature mode shape method, CNN, and faster R-CNN for detecting damage in slab structures. The method defines the damage indicator as the absolute differences between the 2D curvature mode shapes of the damaged and intact slabs. After training, CNN can predict the damage types and faster R-CNN can predict the bounding boxes around the damaged areas. The proposed method shows high classification accuracy for damage type and robustness against noise.
ADVANCES IN ENGINEERING SOFTWARE
(2023)
Article
Computer Science, Interdisciplinary Applications
Thanh Sang-To, Hoang Le-Minh, Magd Abdel Wahab, Cuong-Le Thanh
Summary: This paper introduces a new Shrimp and Goby Association Search algorithm (SGA) for solving large-scale global optimization problems. The performance of SGA is evaluated using 13 benchmark high-dimensional functions, 10 classical benchmark functions, and various real-world engineering applications. It also presents an efficient optimization approach for structural health monitoring (SHM) in truss-like structures, with the example of damage identification in the Canton Tower. The results demonstrate that SGA effectively handles this problem and outperforms population-based algorithms in terms of escaping local optima and convergence rate.
ADVANCES IN ENGINEERING SOFTWARE
(2023)
Article
Computer Science, Interdisciplinary Applications
Hoang-Le Minh, Sang-To Thanh, Samir Khatir, Magd Abdel Wahab, Cuong-Le Thanh
Summary: In this paper, a new damage assessment technique for a high-rise concrete structure with unique shear wall and core wall elements is proposed. The technique utilizes a Finite Element (FE) model updating tool that integrates SAP2000 and MATLAB, allowing for efficient parameter updating without point-click procedures. The damage assessment process is secured by an inverse method using the Termite Life Cycle Optimizer (TLCO) algorithm, which doesn't require initial parameter setting and shows significant improvement in large-scale structure damage identification.
ADVANCES IN ENGINEERING SOFTWARE
(2023)
Article
Engineering, Marine
Bao-Loi Dang, Hung Nguyen-Xuan, Magd Abdel Wahab
Summary: In this paper, a systematic and time-efficient approach is proposed to calibrate 2D VARANS-VOF models for simulating wave interaction with a porous plate. A data-driven approach combined with numerical and experimental data is developed to identify the optimal empirical coefficients associated with drag force coefficients. Advanced gradient boosting decision trees algorithms are used to accurately predict the model parameters. The developed model is validated using available experimental data, showing a high level of agreement.
Article
Computer Science, Interdisciplinary Applications
Yong Ling, Junyan Ni, Joachim Antonissen, Haithem Ben Hamouda, John Vande Voorde, Magd Abdel Wahab
Summary: The objective of this research is to define an optimized strategy for wire arc additive manufacturing (WAAM) process with a numerical tool. A numerical simulation with a scaled steel plate model is conducted, and a series of thermo-metallo-mechanical analyses are performed. The developed models show good prediction capability for hardness and ultimate strength. The ANN algorithm presents high potential in bidirectional modeling to develop the WAAM strategy tool.
SIMULATION MODELLING PRACTICE AND THEORY
(2023)
Article
Materials Science, Coatings & Films
Auezhan Amanov, Ruslan Karimbaev, Chao Li, Magd Abdel Wahab
Summary: The Ultrasonic nanocrystal surface modification (UNSM) technique was used to improve the mechanical properties and fretting wear behavior of Inconel 718 alloy fabricated by laser powder-based direct energy deposition (LP-DED). The surface roughness of the polished and UNSM-treated samples was intentionally kept similar to avoid its impact on fretting wear behavior. The UNSM technique increased the hardness and residual stress of the polished samples, resulting in improved fretting wear resistance at both 24 and 60 degrees C.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Civil
Van-Thien Tran, Trung-Kien Nguyen, H. Nguyen-Xuan, Magd Abdel Wahab
Summary: This paper proposes an algorithm for vibration and buckling optimization of functionally graded porous microplates and investigates the effects of material distribution, length scale, porosity density, and boundary conditions on their characteristics.
THIN-WALLED STRUCTURES
(2023)
Article
Computer Science, Artificial Intelligence
Hoang-Le Minh, Thanh Sang-To, Guy Theraulaz, Magd Abdel Wahab, Thanh Cuong-Le
Summary: This paper introduces a novel bio-inspired meta-heuristic optimization algorithm called the Termite Life Cycle Optimizer (TLCO), which mimics the activities of termite colonies using a mathematical model to find the global optimum in optimization problems. TLCO balances exploration and exploitation tasks by simulating the behaviors of different termite castes. It also uses a combination function and Levy flight to modulate termite movement, improving both convergence rate and accuracy. Comparative experiments demonstrate the effectiveness and reliability of TLCO in solving optimization problems.
EXPERT SYSTEMS WITH APPLICATIONS
(2023)
Article
Engineering, Multidisciplinary
Mohammad Sh. Daoud, Mohammad Shehab, Laith Abualigah, Cuong-Le Thanh
Summary: This paper proposes an improved ChOA algorithm, called RLOChOA, based on Opposition-based learning (OBL) and Reinforcement Learning (RL) to enhance the choice of better solutions and improve the local search technique. The results show that RLOChOA outperforms other state-of-the-art algorithms in terms of solution quality, convergence accuracy, and stability.
JOURNAL OF BIONIC ENGINEERING
(2023)
Article
Acoustics
Shiqiang Qin, Jian Tang, Jiacheng Feng, Yunlai Zhou, Fei Yang, Magd Abdel Wahab
Summary: This study proposes an improved empirical wavelet transform (IEWT) to overcome the inaccurate frequency band division caused by high noise and modulation edge band, and applies it to operational modal analysis (OMA) in civil structures. The IEWT segments the frequency band by determining the spectral trend using the high-frequency components removed from the Fourier spectrum. The IEWT, combined with the random decrement technique and Hilbert transform, accurately identifies the modal parameters from multi-setup ambient vibration measurements, as verified by a full-scale cable-stayed footbridge.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Multidisciplinary Sciences
H. Tran-Ngoc, T. Le-Xuan, S. Khatir, G. De Roeck, T. Bui-Tien, Magd Abdel Wahab
Summary: This paper investigates the feasibility of employing a novel Fibonacy Sequence (FS)-based Optimization Algorithms (OAs) and up-to-date computing techniques for Structural Health Monitoring (SHM) of a large-scale railway bridge. The proposed approach addresses the issues of accuracy and computational cost by using the optimal ability of the golden ratio and superscalar processor. The obtained results show that the approach has great potential for real large-scale structures.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Noureddine Fahem, Idir Belaidi, Abdelmoumin Oulad Brahim, Roberto Capozucca, Cuong Le Thanh, Samir Khatir, Magd Abdel Wahab
Summary: This paper investigates the best stacking sequence of GFRP composites through experimental tests. The main objective is to determine the specifications of GFRP composite material, including its physics-mechanical properties, weight, and cost, and then perform a series of experimental tests with various stacking sequences. The methodology consists of three stages, involving the extraction of bending data from mechanical tests, the simulation of stacking sequences using a validated numerical model, and the determination of parameters for different stacking sequences using an inverse technique based on ANN and JAYA algorithm. The results provide accurate parameter prediction and guidance for selecting the optimal GFRP stacking sequence according to manufacturer's requirements.
MECHANICS OF MATERIALS
(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)
