Article
Mechanics
Quoc-Hoa Pham, Phu-Cuong Nguyen
Summary: This paper analyzes the dynamic stability behaviors of porous functionally graded microplates using a refined plate theory and modified couple stress theory within an isogeometric analysis framework. The effects of microstructure are captured by employing only one material length scale parameter. Numerical investigations are carried out to study the influences of factors such as porosity coefficient and distribution, material length scale, and load factors on dynamic instability characteristics.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Aerospace
Nam V. Nguyen, Kim Q. Tran, P. Phung-Van, Jaehong Lee, H. Nguyen-Xuan
Summary: In this study, an efficient numerical framework is proposed to explore the responses of functionally graded triply periodic minimal surface (FG-TPMS) microplates. The static bending, free vibration, and buckling characteristics of these structures are thoroughly presented for the first time. The study utilizes refined plate theory and isogeometric analysis to study these mechanical responses. It also takes into account the size effect with the modified couple stress theory. The findings contribute to the development and application of TPMS geometry in microscale structures.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Nam V. Nguyen, Duc-Huynh Phan, Jaehong Lee
Summary: The main contribution of this study is the development of an efficient numerical model to investigate the size-dependent geometrically nonlinear static and dynamic characteristics of functionally graded microplates reinforced by graphene nanofillers. The model utilizes modified couple stress theory to capture the size-dependent effect and employs four-variable refined plate theory and isogeometric analysis to calculate the displacement field of small-scale structures. The study examines the dispersion patterns of graphene-based nanofillers and analyzes the response of microplate models under various static or dynamic loads. Nonlinear governing equations of motion are solved using the Newton-Raphson iterative procedure and Newmark's time integration scheme. Additionally, the study incorporates Rayleigh damping to explore its influence on the oscillations of functionally graded microplates reinforced by graphene nanofillers. Numerical examples are conducted to investigate the effects of significant parameters on the geometrically nonlinear behaviors of the microplates.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Nam Nguyen, Jaehong Lee
Summary: This paper presents an intensive numerical study on the static and dynamic responses of smart functionally graded microplates with graphene platelets reinforcement under mechanical and electrical loads. A powerful numerical model and closed-loop control procedure are introduced to actively control the complex behaviors of small-scale structures, taking into account various key parameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
Nam Nguyen, H. Nguyen-Xuan, Jaehong Lee
Summary: This study presents a quasi-three-dimensional shear deformation theory for porous sandwich functionally graded plates with graphene nanoplatelets reinforcement, focusing on static bending and free vibration analyses. Through a novel sandwich plate model combined with isogeometric analysis and refined plate theory, the thickness stretching effect is effectively captured. Effective mechanical properties are evaluated, and various combinations of porosity distributions and graphene nanoplatelet dispersions are studied in detail, with numerical investigations conducted to examine key parameters' effects on sandwich plate structures' behaviors.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(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
Computer Science, Interdisciplinary Applications
Nam V. Nguyen, Kim Q. Tran, H. Nguyen-Xuan
Summary: This study presents an efficient computational approach for analyzing the nonlinear static and dynamic behavior of functionally graded plates based on triply periodic minimal surface architectures. The study investigates the nonlinear behavior of three TPMS structures and evaluates the influence of various parameters and dynamic loads. The results demonstrate that FG-TPMS plates exhibit superior energy absorption capacity under geometric nonlinearity conditions.
ENGINEERING WITH COMPUTERS
(2023)
Article
Mathematics, Applied
Rui Song, S. Sahmani, B. Safaei
Summary: This study investigates the thermal postbuckling characteristics of a PFGM microplate with various central cutout shapes using isogeometric numerical technique. The results show that the effects of size dependency decrease as the thermal postbuckling regime deepens, while the central cutout has a significant impact on the temperature rise in the absence of nonlocality and inclusion of strain gradient size effects.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2021)
Article
Engineering, Mechanical
Mohammad Naghavi, Saeid Sarrami-Foroushani, Fatemeh Azhari
Summary: This study performs static analysis of functionally graded (FG) sandwich plates using the finite strip method based on the refined plate theory (RPT). Different types of FG sandwich plates are considered and their differential equations are obtained using Hamilton's principle. The proposed method is fast, accurate, and capable of modeling various boundary conditions.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Chien H. Thai, H. Nguyen-Xuan, Lieu B. Nguyen, P. Phung-Van
Summary: A size-dependent moving Kriging meshfree approach is proposed for analyzing bending, free vibration, and buckling of functionally graded microplates. The study uses virtual work principle, mixed rule for material properties, and refined plate theory to determine displacement, natural frequencies, and buckling loads of FG microplates. Results demonstrate that natural frequencies, buckling loads, and displacements of FG microplates are influenced by geometrical parameters, boundary conditions, and length-scale parameters.
ENGINEERING WITH COMPUTERS
(2022)
Article
Mechanics
Amin Ghorbani Shenas, Sima Ziaee, Parviz Malekzadeh
Summary: This study presents a comprehensive investigation of the size-dependent nonlinear thermal deformations of rotating trapezoidal functionally graded microplates, using the modified strain gradient theory and a four-variable refined plate theory. The temperature dependence of material properties significantly influences the results, which should be considered for accurate results.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Fenglian Li, Yuxin Chen, Mei Lv
Summary: This study analyzed the vibro-acoustic characteristics of sandwich plates with temperature-dependent parameters, focusing on the effects of temperature variations on vibration and sound transmission loss. It also investigated the influences of parameters such as gradient index, core thickness, and top panel thickness on the vibro-acoustic characteristics. The research results provide a theoretical basis for the optimal design of sandwich structures.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
P. T. Hung, P. Phung-Van, Chien H. Thai
Summary: In this paper, the free vibration and buckling analyses of porous metal foam microplates were studied using the isogeometric approach. The influence of small-scale effect and porous coefficient on the stiffness of the microplate was discussed.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Quoc-Hoa Pham, Phu-Cuong Nguyen, Trung Thanh Tran
Summary: The main goal of this study is to investigate the dynamic response of sandwich nanoplates with a porous functionally graded (PFG) core using isogeometric analysis (IGA) and higher-order shear deformation theory (HSDT). The small-scale effect in nanostructures is taken into account by employing the nonlocal elasticity theory. The proposed method is validated by comparing the numerical results with published works, and some examples are conducted to examine the influence of parameters on the dynamic response of the sandwich nanoplates with the PFG core.
COMPOSITE STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
P. T. Hung, Chien H. Thai, P. Phung-Van
Summary: The classical continuum mechanics theory cannot account for size effects, so the modified strain gradient theory (MSGT) is used instead. Isogeometric approach (IGA) is a computational technique capable of accurately solving complex problems. Therefore, a size-dependent analysis of carbon nanotube-reinforced magneto-electric-elastic microplates based on MSGT is proposed. The refined plate theory (RPT) with four variables, MSGT, and IGA are used in this approach. The influence of various factors on the deflection and natural frequency of the microplates, such as length scale parameters, carbon nanotube distributions, volume fractions, magnetic potential, electric voltage, and geometry, are studied and discussed.
COMPUTERS & STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
Chien H. Thai, A. J. M. Ferreira, H. Nguyen-Xuan, Lieu B. Nguyen, P. Phung-Van
Summary: This paper proposes a nonlocal strain gradient meshfree plate approach for the bending and free vibration analyses of laminated composite and sandwich nanoplates. The deflection and natural frequency of the plates are significantly influenced by the nonlocal and strain gradient parameters. The results show that both models coincide when the nonlocal and strain gradient parameters are taken as zero.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
P. Phung-Van, H. Nguyen-Xuan, Chien H. Thai
Summary: This paper investigates the free vibration analysis of functionally graded graphene platelet-reinforced composites (FG GPLRC) plates using a nonlocal strain gradient isogeometric model based on the higher order shear deformation theory. Various distributed patterns of graphene platelets (GPLs) are considered, and the effects of different parameters on the natural frequencies of the nanoplates are examined. The results obtained in this study can serve as benchmark results for further research on FG GPLRC nanoplates.
ENGINEERING WITH COMPUTERS
(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
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
Engineering, Aerospace
Nam V. Nguyen, Kim Q. Tran, P. Phung-Van, Jaehong Lee, H. Nguyen-Xuan
Summary: In this study, an efficient numerical framework is proposed to explore the responses of functionally graded triply periodic minimal surface (FG-TPMS) microplates. The static bending, free vibration, and buckling characteristics of these structures are thoroughly presented for the first time. The study utilizes refined plate theory and isogeometric analysis to study these mechanical responses. It also takes into account the size effect with the modified couple stress theory. The findings contribute to the development and application of TPMS geometry in microscale structures.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Yun Lu Tee, H. Nguyen-Xuan, Phuong Tran
Summary: This paper investigates the bending behavior of porcupine quills and bioinspired Voronoi sandwich panels, aiming to understand the influence of geometrical design on their bending performance. X-ray micro-computed tomography is used to examine the internal morphology of the quill, revealing a functionally graded structure. Inspired by this, Voronoi sandwich panels are designed with Voronoi seed distribution and gradient transition configurations. Experimental results and simulations show that the graded panels exhibit better bending performance than the uniform panels. This study provides valuable insights for engineering applications in aerospace and automobile industries.
BIOINSPIRATION & BIOMIMETICS
(2023)
Article
Mathematics, Applied
Thang Le-Duc, H. Nguyen-Xuan, Jaehong Lee
Summary: In this study, a novel deep learning model called Finite-element-informed neural network (FEI-NN) is proposed for parametric simulation of static problems in structural mechanics. The approach uses supervised training to consider the parametric variables of structures as input features and implicitly embeds the spatial variables into the loss function through a soft constraint called finite element analysis (FEA) loss. The training process minimizes the empirical risk function while partially respecting the mechanical behaviors through the FEA loss, which is defined as a residual calculated from the weak form of the surrogate system scaled from the actual structure. Additionally, a technique based on batch matrix multiplication is introduced to reduce the time complexity for estimating the FEA loss. The method is demonstrated to outperform traditional data-driven approaches in terms of faster convergence and better DNN models for both generalization and extrapolation performance through several experiments.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Article
Computer Science, Artificial Intelligence
Thang Le-Duc, Quoc-Hung Nguyen, Jaehong Lee, H. Nguyen-Xuan
Summary: In this article, the advantages of heuristic mechanisms are explored, and a new optimization framework named sequential motion optimization (SMO) is devised to enhance gradient-based methods. Inspired by balancing composite motion optimization (BCMO), SMO establishes a sequential motion chain of gradient-guided individuals to improve parameter updates. Experimental results show that SMO outperforms vanilla stochastic gradient descent (SGD) implemented via backpropagation (BP) algorithm in terms of training quality on various benchmark datasets. It is suggested that SMO has the potential to be combined with other gradient-based variants for improving its effectiveness in solving large-scale optimization problems.
IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION
(2023)
Article
Engineering, Mechanical
Lieu B. Nguyen, H. Nguyen-Xuan, Chien H. Thai, P. Phung-Van
Summary: This paper presents a size-dependent isogeometric analysis approach for modeling smart functionally graded porous nanoscale plates made of two piezoelectric materials. The nonlocal elasticity theory is employed to consider size-dependent effects and the governing equations are obtained using a combination of higher-order shear deformation theory and non-uniform rational B-splines formulations. The paper investigates the influences of various factors on the natural frequencies of the smart nanoplate and compares the results with published documents, showing the reliability and effectiveness of the proposed method.
INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
(2023)
Article
Green & Sustainable Science & Technology
Thinh Huynh, Anh Tuan Pham, Jaehong Lee, H. Nguyen-Xuan
Summary: In this paper, a method for optimizing the component parameters of fuel cell hybrid electric vehicles (FCHEVs) is proposed to improve their performance and reduce operating costs. The balancing composite motion optimization (BCMO) algorithm is used to design the polymer electrolyte membrane fuel cell system, lithium-ion battery, electric motor, and differential unit. The proposed method takes into account the desired performance, hydrogen consumption, fuel cell system efficiency, and power source lifespan through a single cost function. Comparative studies validate the effectiveness of the method.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Mechanics
H. Nguyen-Xuan, Kim Q. Tran, Chien H. Thai, Jaehong Lee
Summary: This paper investigates a new model of porous plates called Functionally Graded Triply Periodic Minimal Surface (FG-TPMS) plates. The effective moduli and Poisson's ratio of TPMS structures are evaluated using a fitting technique based on a two-phase piece-wise function. The mechanical characteristics of the FG-TPMS plates are verified through numerical examples, demonstrating their reliability and accuracy.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Trung Kien Nguyen, Muhammad Shazwan Suhaizan, H. Nguyen-Xuan, Phuong Tran
Summary: This work proposes a new lightweight cellular concrete with controllable mechanical properties inspired by natural cellular structures, which is suitable for prefabricated engineering applications. 3D printed sacrificial formworks with lattice and TPMS architectures were used and infiltrated with foamed concrete of different densities. The compressive performance, air void characteristics, and failure mechanisms were investigated through numerical simulations and experimental tests. The gyroid cellular structure exhibited the highest compressive capacity and the bio-inspired architecture of the formworks significantly affected the air void distribution and compressive strength of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Chien H. Thai, P. T. Hung, H. Nguyen-Xuan, P. Phung-Van
Summary: In this paper, a new size-dependent meshfree method is introduced to analyze the free vibrations of magneto-electro-elastic (MEE) functionally graded (FG) nanoplates. The method combines the nonlocal strain gradient theory (NSGT), the higher-order shear deformation theory (HSDT), and meshfree method for the first time. The effective material properties of MEE-FG nanoplates are expressed using a power-law scheme. Numerical examples are given to investigate the effect of various parameters on the natural frequency of MEE-FG nanoplates.
ENGINEERING STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
Nam V. Nguyen, Kim Q. Tran, H. Nguyen-Xuan
Summary: This study presents an efficient computational approach for analyzing the nonlinear static and dynamic behavior of functionally graded plates based on triply periodic minimal surface architectures. The study investigates the nonlinear behavior of three TPMS structures and evaluates the influence of various parameters and dynamic loads. The results demonstrate that FG-TPMS plates exhibit superior energy absorption capacity under geometric nonlinearity conditions.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Artificial Intelligence
Trong Nghia-Nguyen, Mamoru Kikumoto, H. Nguyen-Xuan, Samir Khatir, Magd Abdel Wahab, Thanh Cuong-Le
Summary: Soil compression parameters are crucial for ensuring the safety of civil engineering structures. Currently, evaluating these parameters through laboratory tests is time-consuming and labor-intensive, leading to increased construction costs. In this paper, machine learning models are employed to establish a reliable method for obtaining these parameters, using data from five different construction projects. Various models, including artificial neural network, deep neural network, and optimized deep neural network models, are compared, with the optimized models showing superior performance. Validations using data from a road project confirm the effectiveness and potential applications of the proposed methods.
EXPERT SYSTEMS WITH APPLICATIONS
(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)