Article
Materials Science, Composites
Rui He, Longfei Cheng, Yidi Gao, Hao Cui, Yulong Li
Summary: This paper investigates the effect of in-plane shear stress on the fiber kinking compressive fracture toughness of laminates using compact compression specimens with off-axis fibers. The results show that in-plane shear stress increases the values of the R-curves, leading to an increase in energy dissipation. Microscopic morphology reveals the increasing splitting of fiber bundles and subsequent fiber compression failure as the off-axis angle of the fibers increases.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Mio Sato, Kodai Hasegawa, Jun Koyanagi, Ryo Higuchi, Yuichi Ishida
Summary: A viscoelastic/plastic constitutive equation was proposed for viscoelastic media based on irreversible thermodynamics and viscoelastic theory. Uniaxial tensile tests on TriA-X polyimide resin at different temperatures and strain rates were conducted to determine material parameters. The proposed equation was applied to matrix resin using the FORTRAN programming language for numerical analysis, and transverse tensile failure analysis was performed on unidirectional CFRP under constant strain rate condition.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Composites
Vivekendra Singh, Ragnar Larsson, Robin Olsson, Erik Marklund
Summary: This paper addresses the strain-rate effects in a unidirectional non-crimp fabric carbon/epoxy composite and proposes a new model to simulate compression loading at small off-axis angles. The model utilizes computational homogenization to model the matrix and fiber constituents at finite deformation. By improving the homogenized response in transverse shear stress, the model successfully captures the kink-band formation due to localized matrix shearing and fiber rotation, validating the observed increase in compressive strength at high strain rates.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Huasong Xu, Bin Gou, Jie He, Yong Lu, Hui Chen, Licheng Li, Congzhen Xie, Xiao Matthew Hu
Summary: Smart dielectrics with self-adaptive capabilities can show excellent electric field-grading performance when subjected to an applied electric field above a critical value. However, conventional approaches require high doping rates, which increase interface thermal resistance, limit thermal conductivity improvement, and negatively impact mechanical properties. In this study, a new type of electric field-grading co-continuous phase composite (EP/SiCcf) composed of epoxy resin and SiC ceramic foam was prepared to achieve tunable nonlinear conductive performance, while improving thermal and mechanical properties. The results demonstrate the potential application of the novel composite in smart dielectric materials.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ge He, Yucheng Liu, Y. Hammi, D. J. Bammann, M. F. Horstemeyer
Summary: The integrated material model combines thermodynamics, mechanics, and creep theory to describe the nonlinear, rate-dependent behavior of Fiber Reinforced Polymer (FRP) composites, including viscoelasticity, viscoplasticity, and damage. Evolving internal state variables are used to capture the hardening and softening behaviors of the material, with a tensor used to model the microscale damage phenomena of the composite.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Mechanics
Ryoma Aoki, Ryo Higuchi, Tomohiro Yokozeki
Summary: In this study, open-hole tensile fatigue tests were conducted on carbon-fiber-reinforced polymer laminates using thin-ply prepregs to investigate the effects of varying ply thickness. Fatigue damage growth around a circular hole was evaluated through X-ray radiography, and the effect of fatigue damage on residual strength was assessed through static tensile tests. The results demonstrated that thin-ply laminates can suppress fatigue damage growth and retain residual strength under high-cycle fatigue, confirming their superiority over thick-ply laminates.
COMPOSITE STRUCTURES
(2023)
Review
Polymer Science
Jafar Amraei, Andrzej Katunin
Summary: The self-heating effect is a catastrophic phenomenon that occurs in polymers and polymer-matrix composites (PMCs) under fatigue loading or vibrations. It results in temperature growth in these structures due to their low thermal conductivities, leading to thermal stress and fatigue failure. Therefore, understanding and minimizing the self-heating effect is crucial for practical applications.
Article
Materials Science, Composites
Lin Xiao, Chunrui Lu, Xiaodan Li, Nuo Xu, Ting Zheng, Guanhui Wang, Xiaodong Wang, Dongxing Zhang
Summary: A new biomimetic structure, inspired by the arrangement of nacre in mollusk shells, has been designed and manufactured to enhance the impact resistance of carbon fiber-reinforced polymer composites (CFRPs). The results show that this biomimetic structure can decrease the impact damage of CFRPs and improve their impact resistance.
POLYMER COMPOSITES
(2023)
Article
Engineering, Multidisciplinary
Zhongbin Tang, Chunyang Chen, Aijia Li, Yong Deng, Chao Zhang, Yulong Li
Summary: This study investigates the tensile failure behaviors of PEEK, short carbon, and glass-fiber-reinforced PEEK composites at different temperatures and strain rates. Quasi-static and dynamic tensile tests are conducted, and the fracture morphology is characterized by scanning electron microscopy. The results show that the tensile strength is highly influenced by temperature and strain rate. The failure strain of the composites is less sensitive to strain rate at -30 degrees C and 100 degrees C. Additionally, the energy absorptivity of PEEK composites decreases at extreme temperatures.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Thanasis Chatziathanasiou, Jeroen Soete, Johan Vanhulst, Delphine Carrella-Payan, Larissa Gorbatikh, Mahoor Mehdikhani
Summary: This paper reports the implementation of a methodology for in-situ 3D characterisation of the crack front in a double cantilever beam test using microfocus X-ray computed tomography. The crack initiation and propagation inside the bulk were determined through crack segmentation in the in-situ tomograms, allowing quantification of the fracture toughness without the need for artificially imposed initiation criteria such as the non-linearity.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Manufacturing
Jing Ai, Xiang-bin Du, Dian-sen Li, Lei Jiang
Summary: In this study, a parametric finite element model of three-dimensional five-directional (3D5d) braided composites was established, taking into account the yarn cross-section and the spatial contact between the yarns. The longitudinal and out-of-plane mechanical properties and damage behavior of composites with different parameters were predicted and experimentally verified. The results showed that the mechanical performance of the composites improved with increasing fiber volume fraction, while it decreased with increasing braiding angle.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
Fan Zhang, Yaoyao Ye, Mengze Li, Han Wang, Liang Cheng, Qing Wang, Yinglin Ke
Summary: This paper focuses on understanding the evolution mechanism of micro curing residual stress in medium-temperature cured composites (T700/7901) under out-of-plane tension and its impacts on mechanical responses. An integrated multi-scale framework is established to predict the development of micro residual stress during curing, and experimental and analytical methods are used to verify the model. The results reveal the evolution of micro curing residual stress and demonstrate the necessity of considering curing residual stress in designing and evaluating composites.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Federico Guillermo Bonifacich, Osvaldo Agustin Lambri, Vicente Recarte, Vicente Sanchez-Alarcos, Jose Ignacio Perez-Landazabal
Summary: Composite materials, particularly in 3D printing technology, offer great potential in design and manufacturing of complex structures. The analysis of functional properties of printable composites is crucial, with focus on mechanical damping in this study involving a metamagnetic shape memory alloy composite.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Composites
Tao Zheng, Licheng Guo, Rinze Benedictus, John-Alan Pascoe
Summary: A novel micromechanics-based multiscale progressive damage model is proposed to simulate the compressive failure behaviors of 3D woven composites. The model accurately predicts the failure mechanisms of 3DWC under compression, eliminating the difficulty of obtaining accurate material parameters.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Composites
Shuhang Liu, Yiting Guo, Jianwei Li, Sichen Wu, Jie Xu, Emilia Pawlikowska, Jie Kong, Artur Maciej Rydosz, Mikolaj Szafran, Feng Gao
Summary: Ceramic/polymer dielectric functional composites, specifically the (Ba0.6Sr0.4)TiO3/PEEK (BST/PEEK) composites, were prepared with high frequency stability of the dielectric constant and low dielectric loss via cold-pressing sintering. The optimal properties of the BST/PEEK composites were achieved at a BST concentration of 40 vol% and sintered at 360°C for 1 hour, showing a permittivity of 23, a loss of 0.0065, F(x) <5%, and a dielectric tunability of 11.9%. The study provides insight for developing new composites with low loss and high frequency stability.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Acoustics
E. Salloum, O. Maloberti, S. Panier, M. Nesser, P. Klimczyk, J. Fortin
Summary: This study identifies the magneto-mechanical behavior in electromagnetic components and electrical machines by measuring time-dependent acceleration, magnetic field, and induction signals in a Single Sheet Tester. It distinguishes between inertia-induced strain and magnetic-induced strain, analyzing their characteristics at different frequencies relative to the sample's natural frequency, and investigates the effect of excitation harmonics on mechanical response.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Manufacturing
Alexis Maurel, Matti Haukka, Eric MacDonald, Lauri Kivijarvi, Elmeri Lahtinen, Hyeonseok Kim, Michel Armand, Aurelie Cayla, Arash Jamali, Sylvie Grugeon, Loic Dupont, Stephane Panier
Summary: This paper explores the ability to 3D print lithium-ion batteries using specific materials and processes, discussing the advantages and drawbacks of two different additive manufacturing technologies and proposing strategies for optimizing electrochemical performance. The study shows that complex three-dimensional lithium-ion battery designs exhibit enhanced electrochemical suitability at high current densities compared to traditional two-dimensional designs.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Alexis Maurel, Roberto Russo, Sylvie Grugeon, Stephane Panier, Loic Dupont
Summary: This paper presents the development of an environmentally-friendly lithium-terephtalate/polylactic acid (Li2TP/PLA) composite filament for 3D printing as the negative electrode of a lithium-ion battery. The filament formulation is solvent-free and incorporates synthesized Li2TP particles, PLA polymer powder, poly(ethylene glycol) dimethyl ether, and carbon black to improve printability and electrical performance. A novel route to enhance liquid electrolyte impregnation in 3D-printed electrodes is proposed using slicing software capabilities.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Mathematics, Interdisciplinary Applications
Xiao Ma, Modesar Shakoor, Dmytro Vasiukov, Stepan V. Lomov, Chung Hae Park
Summary: Numerical artifacts in FFT methods for multiphase elastic problems, caused by irregular discretization of the interface, are addressed in this study. An enhanced composite voxel method using the level-set technique is proposed to alleviate implementation difficulties and is particularly useful for non-parametrized interface representations.
COMPUTATIONAL MECHANICS
(2021)
Article
Energy & Fuels
Alexis Maurel, Hyeonseok Kim, Roberto Russo, Sylvie Grugeon, Michel Armand, Stephane Panier, Loic Dupont
Summary: This article focuses on the development of a polylactic acid- (PLA-) based thermoplastic composite filament for use as a current collector in lithium-ion or sodium-ion batteries. By incorporating Ag-coated Cu charges and a plasticizer, the filament achieves high electronic conductivity and printability. The study demonstrates the compatibility of this filament with various active materials and its ability to be used with negative electrode active materials in a wide potential window in sodium-ion battery technology.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
M. Nesser, O. Maloberti, E. Salloum, J. Dupuy, S. Panier, C. Pineau, J-P Birat, J. Fortin, P. Dassonvalle
Summary: The purpose of this study is to investigate the impact of ultra-short pulse laser treatments on the magnetic properties of grain-oriented electrical steels. The study proposes adjusted models to estimate the effects of laser treatments on the steel surface and correlates these physical impacts with loss coefficients. The optimization of laser parameters is found to significantly reduce iron loss.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Materials Science, Composites
Christophe Cruanes, Keerthi Krishna Parvathaneni, Dmytro Vasiukov, Chung Hae Park
Summary: This study investigated the mechanism of crack propagation in three-dimensional glass-fiber warp interlock epoxy composites under fatigue loading using time-lapse micro-computed tomography observations. The results showed that detectable cracks were initiated by debonding between adjacent warp yarns and grew along their interface. Further crack propagation occurred along one of the warp yarns aligned in the loading direction. The coalescence of cracks and propagation to weaker zones were observed around the middle lifetime. The influence of void defects at different material scales was also demonstrated, with interyarn voids having little impact on fatigue performance and intrayarn voids significantly degrading the fatigue performance at the micro-scale.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
O. Maloberti, P. Dupont, T. Etifier, E. Salloum, M. Ployard, P. Dassonvalle, J. Fortin, S. Panier
Summary: This work investigates a 2-D vector field behavioral model to describe the anisotropic magnetic permeability and losses in Grain-Oriented Electrical Steels (GOES) within quasi-static and magneto-harmonic working conditions. The model considers the effects of non-hysteretic magnetic field, quasi-static hysteresis losses, and dynamic damping eddy field.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Materials Science, Multidisciplinary
O. Maloberti, E. Salloum, M. L. Ababsa, M. Nesser, S. Panier, P. Dassonvalle, J. Fortin, C. Pineau, J-P. Birat
Summary: This paper discusses the dynamic magnetic properties of soft magnetic materials and the influence of sheet thickness on iron losses. The analysis and experiments were conducted through magnetic measurements and microscopic observations to predict the results and conclusions under different thicknesses.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Shahryar Manzoor, Israr Ud Din, Khaled Giasin, Ugur Koklu, Kamran A. Khan, Stephane Panier
Summary: Considering the challenges in machining composites, this study numerically evaluated the effects of cutting parameters on thrust force and torque during drilling of glass-fiber-reinforced polymers. A developed model accurately predicted the thrust force and torque profiles, providing useful guidelines for drilling operations to minimize drilling-induced damage. The study also investigated the effect of coefficient of friction and found that higher friction reduced the thrust force.
Article
Engineering, Multidisciplinary
Krushna Shinde, Vincent Itier, Jose Mennesson, Dmytro Vasiukov, Modesar Shakoor
Summary: This paper proposes an original approach based on an autoencoder neural network to construct a nonlinear Reduced-Order Model for a highly nonlinear brittle fracture problem. The effectiveness of the autoencoder in dimensionality reduction or compression of highly nonlinear data is demonstrated through a set of simulations. A complete deep learning framework is introduced to predict crack propagation patterns directly from the loading conditions. The proposed approach is validated using data sets generated for two problems with proportional and non-proportional loading conditions, evaluating its capabilities.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Mechanics
Xiao Ma, Yang Chen, Modesar Shakoor, Dmytro Vasiukov, Stepan V. Lomov, Chung Hae Park
Summary: This paper focuses on the numerical implementation of phase-field models of fracture using the Fast Fourier Transform based numerical method. The influence of a simplification in the phase-field evolution equation on heterogeneous materials is assessed and a complete formulation is proposed. The assessment shows that the simplified formulation leads to artificial diffusion of damage between different components, while the complete formulation suppresses this diffusion.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
Xiao Ma, Dmytro Vasiukov, Modesar Shakoor, Stepan V. Lomov, Chung Hae Park
Summary: This paper focuses on the numerical implementation of phase-field models of fracture using the Fast Fourier Transform (FFT) based numerical method. The choice of regularization length in phase-field models is important for both macroscopic mechanical behavior and local crack propagation patterns. Wu's phase-field model has been successful in reducing length sensitivity for homogeneous materials, and it has also been found to be more suitable than Miehe's model for brittle failure with the introduction of an elastic stage. The sensitivity of Wu's model for heterogeneous materials has also been investigated in this study.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Characterization & Testing
Julien Vasseur, Nicolas Leymarie, Vincent Dorval, Benoit Dupont, Dmytro Vasiukov, Salim Chaki
Summary: Ultrasonic imaging using the Total Focusing Method (TFM) is useful for accurately locating and sizing defects, but can be distorted by multiple scattering phenomena when imaging clusters of pores. This study performs simulations in a 2D context with different scattering models, and compares the results with experimental tests using controlled sets of side-drilled holes. The use of a multiple scattering model improves the qualitative and quantitative accuracy of the TFM images by considering shadowing and interaction effects between defects.
NDT & E INTERNATIONAL
(2023)
Review
Computer Science, Information Systems
Alexis Maurel, Ana C. Martinez, Sylvie Grugeon, Stephane Panier, Loic Dupont, Pedro Cortes, Cameroun G. Sherrard, Ian Small, Sreeprasad T. Sreenivasan, Eric Macdonald
Summary: High-resolution additive manufacturing enables the production of intricate structures that could revolutionize the fabrication of next-generation batteries. By utilizing vat photopolymerization technology, shape-conformable three-dimensional batteries with improved safety and power performance can be co-designed for specific applications, reducing weight and dead volume. Different approaches such as introducing solid electroactive particles or metal precursors are discussed, along with the impact of thermal post-processing on the electrochemical properties of VPP printed battery components.
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)
