Article
Mechanics
Bui Gia Phi, Dang Van Hieu, Hamid M. Sedighi, Abdullah H. Sofiyev
Summary: This work investigates the nonlinear free vibration characteristics of functionally graded composite micro-beams reinforced by carbon nanotubes with piezoelectric layers in a thermal environment. Different distribution types of the carbon nanotube reinforcements are examined. The equations of motion are derived and two analytical methods are used to obtain the approximate nonlinear frequencies. The influences of various parameters on the nonlinear free vibration behaviors of the micro-beams are discussed in detail.
Article
Engineering, Multidisciplinary
Pham Toan Thang, Phuong Tran, T. Nguyen-Thoi
Summary: This research paper investigates the vibrational responses of functionally graded carbon nanotube-reinforced composite nanoplates considering the effect of nonlocal parameter and strain gradient coefficient. By studying four types of CNT distribution under small length scale effects, the study aims to estimate the fundamental natural frequencies in FG-CNTRC nanoplates. The mathematical modeling and analytical solutions provide insights into how the small length-scale influences the vibrational behavior of nanoplates.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Mechanics
Aniket Gopa Chanda, Devesh Punera
Summary: Smart structures offer functional advantages through material tailoring and controlled response. Porosity in functionally graded materials can be detrimental in aerospace/automobile components but favorable for biomedical implants. In this work, a higher order shear and normal deformation theory is used to accurately model smart porous FG structures.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Mechanics
Manjur Alam, Sudib K. Mishra
Summary: This study investigates the geometrically nonlinear vibration of NL-SG beams on a nonlinear substrate with shear interactions. It includes higher-order curvature, von Karman nonlinearity, and a nonlinear Pasternak model for the substrate. The research shows that nonlinear bending and substrate stiffness play a dominant role in influencing the vibration behavior, while the NL and SG interactions significantly affect the vibration behavior with the effect of functional gradation of material being minor.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Yan-Ming Ren, Peter Schiavone, Hai Qing
Summary: In this paper, a nonlocal gradient piezoelectric model capable of distinguishing softening and toughening size-effects due to elasticity and piezoelectricity is proposed. The model is applied to study the static bending of functionally graded piezoelectric nanobeams. The results show that bending deflections increase consistently with the increase of nonlocal parameter and the decrease of gradient parameter for strain-driven model and the decrease of nonlocal parameter and the increase of gradient parameter for stress-driven model.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Computer Science, Interdisciplinary Applications
Pham Toan Thang, Dieu T. T. Do, Jaehong Lee, T. Nguyen-Thoi
Summary: This paper presents an in-depth study on the influence of nanoscale parameters on the bending and free vibration responses of functionally graded carbon nanotube-reinforced composite nanoshells. Mathematical formulas and numerical calculations are used to investigate the effect of nanoscale parameters, material properties, and shell shapes on the deflection and fundamental frequency parameters of the nanoshells.
ENGINEERING WITH COMPUTERS
(2023)
Article
Mechanics
J. R. Cho
Summary: This paper introduces a nonlinear numerical method for solving the nonlinear vibration problem and investigates the parametric nonlinear free vibration characteristics of FG-CNTRC plates. Through numerical formulation and comparison with reference methods, the method's reliability is confirmed with a maximum relative difference less than 8.0%. The study explores the effects of gradient pattern, volume fraction of CNTs, relative thickness, and aspect ratio on the nonlinear free vibration characteristics of FG-CNTRC plates.
COMPOSITE STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
P. Phung-Van, Chien H. Thai
Summary: This paper introduces a novel nonlocal strain gradient isogeometric model for functionally graded carbon nanotube-reinforced composite nanoplates, capturing both nonlocal effects and strain gradient effects. The model is based on higher-order shear deformation theory and virtual work principle, and is analyzed using isogeometric analysis to study the deflection and natural frequency of nanoplates. The effects of nonlocal parameter, strain gradient parameter, CNT volume fraction, CNT distributions, and length-to-thickness ratios on deflection and natural frequency are examined through numerical results. Stiffness-softening and stiffness-hardening mechanisms are shown by the present model.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Multidisciplinary
Yan Niu, Minghui Yao, Qiliang Wu
Summary: This paper investigates the nonlinear vibration of a simply supported functionally graded graphene reinforced composite cylindrical panel under transverse excitation. Various models and methods are used to predict material properties and system responses, leading to results through parametric studies.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Acoustics
Aria Ghabussi, Mostafa Habibi, Omid NoormohammadiArani, Aghil Shavalipour, Hossein Moayedi, Hamed Safarpour
Summary: This study examines the frequency analysis of a graphene nanoplatelet composite circular microplate using a numerical-based generalized differential quadrature method. It finds that factors such as the outer to inner radius ratio, length scale and nonlocal to thickness ratios, and graphene nanoplatelet weight fraction significantly influence the frequency characteristics of the microplate. The research suggests that for designing such microplates, attention should be paid to factors like outer to inner radius ratio, graphene nanoplatelet weight fraction, and their interplay.
JOURNAL OF VIBRATION AND CONTROL
(2021)
Article
Mathematics, Applied
Shuai Wang, Jiajia Mao, Wei Zhang, Haoming Lu
Summary: This paper analyzes the nonlocal thermal buckling and postbuckling behaviors of a multi-layered graphene nanoplatelet reinforced piezoelectric micro-plate. The effects of external voltage, distribution and characteristic of graphene, and nonlocal parameter on the critical buckling behaviors and postbuckling equilibrium path are numerically analyzed.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Engineering, Civil
P. Phung-Van, Qui X. Lieu, A. J. M. Ferreira, Chien H. Thai
Summary: This study presents an effective and simple approach based on RPT and IGA for bending and vibration analyses of FG GPLRC nanoplates. The reinforcement of GPLs can dramatically improve the stiffness of nanoplates, with rich GPLs at the bottom and top considered the most effective for reinforcement.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Jin-Rae Cho
Summary: This paper introduces a nonlinear numerical method to solve the large deflection problem and parametrically investigates the nondimensional load-deflection behavior of functionally graded carbon nanotube-reinforced composite plates. The study shows that the nonlinear behavior of the plates is significantly affected by the presence and gradient pattern of CNTs, as well as the width-to-thickness and aspect ratios of the plates and the type of boundary conditions.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Qilin Jin
Summary: This study proposes an attractive plate model to analyze the MFC piezoelectric laminated plate. The improvement of precision of interlaminar shear stresses is achieved through the use of 3D elasticity equations and the Reissner mixed variational theorem. The study also investigates the effect of several significant parameters on the deformations and stresses of the MFC piezoelectric plates with reinforcements.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Ahmed Amine Daikh, Mohamed Sid Ahmed Houari, Mohamed Ouejdi Belarbi, Salwa A. Mohamed, Mohamed A. Eltaher
Summary: This manuscript presents a comprehensive study on the effects of thickness stretching on the free vibration, static stability, and bending of multilayer functionally graded carbon nanotubes reinforced composite nanoplates. Nonlocal strain gradient continuum model is used to consider the nanoscale and microstructure influences. Parametric analysis is conducted to explore the impact of different parameters on the stresses, deformation, critical buckling loads, and vibration frequencies.
DEFENCE TECHNOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
J. J. Mao, L. J. Guo, W. Zhang
Summary: This paper investigates vibrations of an edge-cracked functionally graded graphene reinforced composite beam with piezoelectric actuators and provides a numerical analysis of the influencing factors. The research results contribute to predicting the dynamic behavior of cracked beams and promoting the development of structural health monitoring.
ENGINEERING WITH COMPUTERS
(2023)
Review
Physics, Multidisciplinary
Ying Sun, Wei Zhang, Ming Hui Yao, Jia Jia Mao, Jingyi Liu
Summary: The study focuses on the nonlinear dynamic behaviors of the circular mesh antenna in a complex space environment, establishing dynamic models and equations to analyze the system. By simplifying the antenna structure and applying third-order Galerkin method, the study derives high-dimensional nonlinear dynamic equations and explores the topological equivalent nonlinear equations under different conditions. The extended energy phase method is used to verify multi-pulse chaotic motion in the six-dimensional system, with numerical simulations confirming the theoretical analysis.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Mathematics, Applied
Shuai Wang, Jiajia Mao, Wei Zhang, Haoming Lu
Summary: This paper analyzes the nonlocal thermal buckling and postbuckling behaviors of a multi-layered graphene nanoplatelet reinforced piezoelectric micro-plate. The effects of external voltage, distribution and characteristic of graphene, and nonlocal parameter on the critical buckling behaviors and postbuckling equilibrium path are numerically analyzed.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Engineering, Aerospace
Li-Jia Guo, Jia-Jia Mao, Wei Zhang, Ya-Ze Liu, Jie Chen, Wei Zhao
Summary: This paper establishes a mathematical model to analyze the static and dynamic behaviors of functionally graded graphene reinforced composite beam with geometric imperfection subjected to thermo-electro-mechanical load. The coupling effect of geometric imperfections and thermo-electric-mechanical loads is found to have a significant impact on the bending and vibration of the beam.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jia-Jia Mao, Shuang Liu, Lili Li, Jie Chen
Summary: The vibrational properties of defective single-layer graphene sheets (SLGSs) during tension were investigated through comprehensive molecular dynamic simulations. The results showed that the elastic properties of SLGSs are insensitive to vacancy defects, while the ultimate strain is noticeably reduced by the vacancies. Single vacancy has no effect on the vibration properties, while increasing vacancy concentration leads to a decrease in frequency at the elastic stage. The frequency of yielded SLGSs with a certain vacancy concentration remains almost constant even with varying external force.
Article
Thermodynamics
Dong-Xing Cao, Yi-Ming Lu, Siu-Kai Lai, Jia-Jia Mao, Xiang-Ying Guo, Yong-Jun Shen
Summary: Recent advances in the design of piezoelectric vibration-based energy harvesters (PVEHs) have focused on improving their performance under multi-directional, multi-modal, and low-frequency conditions. This study introduces a mechanically-guided three-dimensional assembly structure and reliable soft encapsulation technology to construct a PVEH system with significantly higher power output compared to conventional models. Experimental results show that the encapsulated PVEH can achieve almost 560 times more power output than the unencapsulated one, demonstrating its potential for practical applications in wireless sensor networks, wearable electronics, and low-power microelectronics.
Article
Engineering, Civil
Li-Jia Guo, Jia-Jia Mao, Wei Zhang, Meiqi Wu
Summary: This paper investigates the effect of cracks on the stability of the cracked functionally graded graphene-nanoplates reinforced composite beam covered with piezoelectric layers. The critical buckling loads and postbuckling paths of the novel structures with cracks are studied. The results show that the graphene platelets (GPLs) can significantly improve the stability of the cracked piezoelectric beams, while increasing crack depth has the opposite effect.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Civil
Zhiwei Song, Siu-Kai Lai, Jian-Guo Dai
Summary: In this paper, two refined models are proposed for the vibration analysis of thin plates with part-through surface cracks. The models can handle different types of cracks and complement the deficiencies of the conventional model for analyzing crack depth problems. Parametric studies are conducted to validate the performance and accuracy of the models.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Jia-Jia Mao, Ying-Jie Wang, Wei Zhang, M. Q. Wu, Y. Z. Liu, Xiao-Hong Liu
Summary: This paper proposes an FEA method to study the vibration and wave propagation in functionally graded material (FGM) beams with multiple inclined cracks. The method incorporates the influence of the cracks on the local flexibility matrix and considers the interaction between the bending and tensile stiffnesses of the cracks. The study examines the effects of various parameters, such as crack location, length, inclined angle, and material property ratio, on the fundamental frequencies and wave propagation characteristics of the inclined cracked FGM beams.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Mechanics
Shuangbao Li, Jiang Li, Hengjia Zhu, Siu-Kai Lai
Summary: This study investigates the performance of vibration reduction of a lightweight non-smooth nonlinear energy sink (NES) attached to a two-story linear damped primary structure (PS) through dynamical analysis and numerical verification. A three-degree-of-freedom non-smooth nonlinear system is formulated to describe the coupled dynamics between the PS and non-smooth NES. The stability conditions, initial critical energy, and numerical optimization of the NES are analyzed, showing its excellent performance in vibration reduction.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Engineering, Civil
J. F. Wang, G. Cao, Z. W. Song, S. K. Lai
Summary: This paper extends the Chebyshev-Ritz method to the free vibration analysis of delaminated FGM plates, dividing the FGM plates into four sub-regions based on the region approach. The kinetic energy and potential energy of each sub-region are derived, and the modal functions of the displacement fields of FGM plates are constructed according to the displacement continuity conditions of the delamination interface and the boundary conditions of such plates. The effects of asymmetric material distribution, delamination length ratio, Young's modulus ratio, and boundary support on the vibration behavior of FGM plates are investigated. This semi-analytical study provides a reasonable theoretical basis for the behavior prediction and delamination identification of composite structures.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Civil
Jia-Jia Mao, Ying-Jie Wang, Jie Yang
Summary: The paper focuses on the static and dynamic instabilities of a functionally graded beam with multiple inclined cracks under the influence of an axial force. Finite element analysis is used to determine the bending and tensile stiffness of the cracked section and the coupled effect of loadings. Equations are derived to describe the instability of the beam and can be solved to obtain the natural frequency and buckling load. The study investigates the effects of crack position, inclination angle, length, elasticity modulus ratio, and load factors on the stability of the cracked functionally graded beam.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Chemistry, Physical
Chen Wang, Youhong Ji, Siu-Kai Lai, Yuhao Liu, Ying Hao, Gaolei Li, Chenxi Wang, Gui-Lin Wen
Summary: This work proposes a new technique for efficient harnessing of structural and biomechanical vibration energy using a speed-amplified multi-stable tri-hybrid energy harvesting system. The system integrates frequency up-conversion piezoelectric generators, an array-type electromagnetic generator, and a sliding-mode triboelectric nanogenerator. The design incorporates a rack-pinion mechanism to double the relative speed between the stators and the translators, resulting in improved performance under wideband and low-frequency vibration sources. The prototype of this design demonstrates promising results in power generation and can serve as a sustainable power source for wearable/portable electronics and wireless monitoring systems.
Article
Engineering, Multidisciplinary
Y. T. Zhang, S. K. Lai, Chun H. Wang
Summary: The practical exploration of the thermophone concept based on a thermoacoustic mechanism has been made possible by advances in nanomaterials. The study found that 3D graphene foams demonstrate higher sound generation capability and thermal acoustic efficiency compared to 2D graphene thin films. Additionally, the mechanical properties of the substrate have a smaller impact on the sound pressure level response of 3D graphene foam devices compared to 2D graphene thin film devices.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Civil
H. N. Li, W. Wang, S. K. Lai, L. Q. Yao, C. Li
Summary: This paper investigates the nonlinear vibration and stability analysis of rotating functionally graded (FG) piezoelectric nanobeams using the nonlocal strain gradient theory. The study derives nonlinear equations of motion and discretizes them to determine the vibration frequencies and buckling loads of the nanobeams. The results show that increasing the nonlocal parameter and material length parameter can result in a stiffness-hardening effect, and incorporating the effect of geometric nonlinearity is crucial for accurate analysis.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(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)
