Article
Materials Science, Composites
Monica Sannamani, Jinling Gao, Weinong W. Chen, Tyler N. Tallman
Summary: Carbon fiber reinforced polymers (CFRPs) are promising alternatives to traditional metals in weight-conscious applications due to their superior strength-to-weight properties. However, they are susceptible to complex and difficult-to-predict sub-surface damages. This paper investigates the application of electrical impedance tomography (EIT) to non-planar CFRP geometries and proposes a modified EIT sensitivity matrix formulation to incorporate the electrical anisotropy of the material.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Electrochemistry
A. Schuller, T. J. Schmidt, J. Eller
Summary: A new non-invasive method based on electrical impedance tomography is proposed to determine the conductivity distribution in-plane of the PEFC membrane. The method shows potential in accurately reconstructing different conductivity profiles with surface current injection and voltage measurement. However, the accuracy of electrode positioning, cell characterization, and measurement system still need to be addressed.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Yandan Jiang, Junchao Huang, Haifeng Ji, Baoliang Wang, Zhiyao Huang, Manuchehr Soleirnani
Summary: In this paper, a new dual-frequency imaging framework for capacitively coupled electrical impedance tomography (CCEIT) is proposed. The framework utilizes two different working frequencies to obtain the real and imaginary parts of the impedance, and further introduces image fusion to obtain a fused image with improved imaging performance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Mechanics
A. Rajaneesh, F. Ravailler, N. Preud'homme, M. Bruyneel
Summary: We propose a smeared crack formulation-based continuum damage model for failure analysis of balanced woven composites, considering ply nonlinear damage, plasticity, physical fracture toughness values, and finite element mesh size. The model is implemented in LS-Dyna and delamination between plies is modeled using user-defined cohesive behavior. Material properties are measured from various tests, and the effect of interface angle on delamination behavior is investigated. The model's predictability is demonstrated through flexural and open hole tension tests, with good agreement between finite element predictions and test measurements.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Mathias Haingartner, Sandra Gschossmann, Max Cichocki, Martin Schagerl
Summary: This article introduces a new current injection pattern for electrical impedance tomography, which improves hole detection quality in carbon fiber reinforced polymer plates and allows for delamination detection. The advantages of the new pattern are demonstrated through numerical finite element analyses and experimental validation.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2021)
Article
Engineering, Geological
Duohao Yin, Qianjun Xu
Summary: In this study, resistivity based on electrical impedance spectroscopy (EIS) was applied to investigate the damage evolution in sandstone, and a damage evolution equation and constitutive model were established based on experimental data. The results demonstrate that resistivity accurately characterizes the damage evolution in rocks.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Biophysics
Ethan K. Murphy, Samuel B. Klein, Alexandra Hamlin, Justin E. Anderson, Joseph M. Minichiello, Alexander L. Lindqwister, Karen L. Moodie, Zachary J. Wanken, Jackson T. Read, Victor A. Borza, Jonathan T. Elliott, Ryan J. Halter, Vikrant S. Vaze, Norman A. Paradis
Summary: This study analyzed the performance of electrical impedance tomography (EIT) in detecting subclinical hemorrhage and found that EIT was superior to standard clinical metrics in early detection.
PHYSIOLOGICAL MEASUREMENT
(2022)
Article
Instruments & Instrumentation
Wenru Fan, Chi Wang
Summary: Damage estimation is crucial for monitoring the remaining life of carbon fiber reinforced plastic/polymer (CFRP). Electrical impedance tomography (EIT) is increasingly being studied as a non-invasive and low-cost method for structural health monitoring of CFRP. A new damage estimation method (DEM) is proposed in this paper to quantify the location and area of damage, showing promising potential based on simulation and experimental results.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Electrochemistry
A. Schuller, T. J. Schmidt, J. Eller
Summary: A non-invasive method is proposed to determine the local humidity and resistance distribution in polymer electrolyte fuel cells. The method uses multiple electrodes to inject alternating currents and interprets the results through interpolation, showing good matching and reproducibility.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Review
Chemistry, Analytical
Francesca Pennati, Alessandra Angelucci, Letizia Morelli, Susanna Bardini, Elena Barzanti, Federico Cavallini, Antonello Conelli, Gaia Di Federico, Chiara Paganelli, Andrea Aliverti
Summary: Electrical impedance tomography (EIT) is a non-invasive medical imaging technique that reconstructs internal conductivity distribution based on injected current or voltage patterns and collected voltages. EIT offers advantages such as no ionizing radiation, high temporal resolution, low cost, and portability. However, it suffers from poor spatial resolution. Recent advancements in wearable EIT devices have shown promise in clinical measurements and home monitoring.
Article
Engineering, Electrical & Electronic
Qian Xue, Kai Zhang
Summary: A new method with the integrated attention mechanism of IPDC network model is proposed to address the challenges of EIT in CFRP damage detection. Simulation and prototype results demonstrate that this method can reduce artifacts in damage images, improve accuracy in damage location, and enhance the definition of damage edges.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Said Quqa, Sijia Li, Yening Shu, Luca Landi, Kenneth J. Loh
Summary: This paper explores the efficacy of supervised machine learning in solving the inverse electrical impedance tomography problem and reconstructing the conductivity distribution of a piezoresistive sensing film. A deep neural network is used to reconstruct the conductivity distribution within the painted area by using voltage measurements collected at sparse boundary locations. The paper presents a new approach to test the suitability of synthetic datasets built using a finite element model of the sensing film. Promising results are obtained compared to conventional methods.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
T. Jamie Healey, Emily Rose Billinge, James J. P. Alix, Visakan Kadirkamanathan, Charlotte R. Kemp
Summary: Mismatch in electrode impedance is a common source of artefact in electrical impedance spectroscopy systems. A new clinical system has been developed to investigate muscle impedance anisotropy with reduced levels of artefact, even in the presence of significant mismatch in electrode impedances. The system integrates buffering at the front-end and operates over a physiologically relevant frequency range.
IEEE SENSORS JOURNAL
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Talles Batista Rattis Santos, Rafael Mikio Nakanishi, Erick Dario Leon Bueno de Camargo, Marcelo Brito Passos Amato, Jari P. Kaipio, Raul Gonzalez Lima, Jennifer L. Mueller
Summary: In this study, a technique was proposed to postprocess the reconstruction images of electrical impedance tomography (EIT) using a statistical prior from an anatomical atlas, and its effectiveness was demonstrated on data from two patients with cystic fibrosis. The results showed that this technique can improve the spatial resolution of EIT images, revealing pathologies that may be difficult to discern in the original EIT images.
Article
Materials Science, Textiles
Changjiang Qian, Shuo Wang, Meng Cao
Summary: This study conducted real-time monitoring of the internal damage state of fiber metal laminates (FMLs) under quasi-static loading by measuring the rate of change of resistance using graphene nanoplatelets (GNPs)/epoxy resin conductive matrix. The feasibility of establishing a conductive network in the FMLs matrix by incorporating an appropriate amount of GNPs into the epoxy resin matrix was confirmed. The resistance changes of the FMLs under three-point bending and stretching loads were tested, providing a more accurate assessment of the damage mode in FMLs.
FIBERS AND POLYMERS
(2023)
Article
Mechanics
Chiara Morano, Ahmed Wagih, Marco Alfano, Gilles Lubineau
Summary: This study investigates the mechanical performance of adhesive bonded composite/metal T-joints. The results show that by tailoring the architecture of the stiffener, using corrugated flanges with a square wave profile, superior performances can be achieved, with an increase of +65% in pull-off strength and +416% in absorbed energy compared to the conventional configuration.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Manufacturing
Muhammad Basha, A. Wagih, T. Khan, G. Lubineau, T. A. Sebaey
Summary: This paper demonstrates that using thin plies can enhance the flexural response of conventional composites at elevated temperatures. The laminates containing thin plies showed higher flexural strength and modulus at all tested temperatures. The presence of thin plies delayed compressive fiber damage, interrupted heat flow, and reduced delamination and matrix cracks.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Mathematics, Interdisciplinary Applications
Bram van der Heijden, Yunteng Wang, Gilles Lubineau
Summary: This paper proposes a data-driven approach to predict mechanical responses for structures directly from full-field observations obtained on previously tested structures. The approach uses raw data, called patches, comprising displacement fields obtained during data harvesting through full-field measurement. A library of such patches is compiled to compute responses for new structures, and the approach is not limited to specific types of structures or mechanics.
COMPUTATIONAL MECHANICS
(2023)
Article
Polymer Science
Mohammad K. A. Khan, Harri Junaedi, Hassan Alshahrani, Ahmed Wagih, Gilles Lubineau, Tamer A. Sebaey
Summary: This study demonstrated an enhancement in notch sensitivity of a hybrid carbon/epoxy (CFRP) composite with a Kevlar core sandwich compared to monotonic CFRP and Kevlar composites. Open-hole tensile samples with different width to diameter ratios were tested, showing that the hybrid laminate has lower notch sensitivity and a higher specific strength compared to CFRP and KFRP laminates. The enhancement in notch sensitivity was attributed to its progressive damage mode and the lower density of Kevlar fibers in the hybrid composite.
Article
Materials Science, Multidisciplinary
Ruslan Melentiev, Ran Tao, Gilles Lubineau
Summary: Electrochemical plating is widely used for coating commodity polymers, but the traditional process using chromic acid produces hazardous waste. This study proposes a greener route by hot-embossing and acid-etching the ABS polymer before plating, which greatly enhances coating adhesion and reduces etching time. Microscopic characterization shows that the adhesion strength at the hierarchical interface exceeds that of the ABS polymer. This method can significantly reduce the use of toxic acids in the electroplating industry without compromising the coating quality.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Arief Yudhanto, Xiaole Li, Ran Tao, Ruslan Melentiev, Gilles Lubineau
Summary: This paper reviews recent advances in the evaluation of metal-polymer adhesion through tape test and peel test in electroplating processes, with a focus on electroplated copper-ABS as a case study. The article also provides recommended practices for using these tests to assess metal-polymer adhesion. This review is expected to guide engineers and scientists in achieving superior metal-polymer adhesion through effective electroplating formulations.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Ruslan Melentiev, Ran Tao, Lujain Fatta, Amit K. Tevtia, Nikhil Verghese, Gilles Lubineau
Summary: Electroplating on polymers involves chemical and mechanical interactions of the surface to ensure adhesion. However, the relative contributions of these factors have been debated without quantitative evidence. This study separates the contribution of polymer chemistry by using non-interlocking micro-textures with varied surface area. The results show that chemical adhesion only contributes a minor fraction to the overall adhesion strength in electroplating.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Fatimah Aldakheel, Konstantinos Ntetsikas, Arief Yudhanto, Gilles Lubineau, Nikos Hadjichristidis
Summary: Grafting non-polar polymer chains on the surface of polar nanoparticles enhances particle/matrix interactions, leading to improved mechanical properties in non-polar matrices. In this study, omega-triethoxysilyl polystyrene (PS-TEOS) and PS-b-PI macromonomers were synthesized and hydrolyzed/condensed to form grafted silica nanoparticles with either PS or PS-b-PI chains. The molecular characteristics and formation of the nanoparticles were confirmed using various techniques. Blends of the nanoparticles with PS and PS-b-PI were obtained and their mechanical properties and morphological features were examined. This method provides a way to control the properties of PS-based nanocomposites.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Chiara Morano, Nao Terasaki, Tianyi Gao, Gilles Lubineau, Marco Alfano
Summary: We investigate the mechanics of crack propagation in adhesive joints inspired by the base plate of the barnacle Amphibalanus amphitrite. The joints feature buried hollow cylindrical channels that modulate the strain energy release rate (ERR) and enable a crack-tip shielding mechanism. Finite element simulations and experiments validate the occurrence of crack pinning/depinning cycles. Mechanoluminescent (ML) coating is used to study the transient stress field in the crack tip region, revealing details of snap-through cracking in the bio-inspired adhesive joints.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Computer Science, Interdisciplinary Applications
Y. Wei, Q. Serra, G. Lubineau, E. Florentin
Summary: In this study, a new technique based on physics-informed neural networks (PINNs) is proposed to implement constitutive equation gap method (CEGM) optimization process, which allows for easy construction of the admissible stress field with the help of automatic differentiation. The proposed method is compared with classical identification strategies and demonstrated its effectiveness in simple 2D cases and tomographic images, showing its great potential for practical applications.
COMPUTERS & STRUCTURES
(2023)
Article
Engineering, Chemical
Ran Tao, Lujain Fatta, Ruslan Melentiev, Amit K. Tevtia, Gilles Lubineau
Summary: A typical step in electroplating metals onto polymer substrates is the surface preparation of substrates through sulfochromic acid etching, which modifies the chemistry and morphology of the surfaces. The relative contributions of chemical interactions and mechanical interlocking towards the final adhesion are not well understood. This study proposes different sample preparation strategies to address these issues and finds that chemical contribution is critical for wetting during electroless plating, while mechanical interlocking is the major contributor for the ultimate adhesion of electroplated copper to acrylonitrile-butadiene-styrene interfaces.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Engineering, Chemical
Ruslan Melentiev, Ran Tao, Xiaole Li, Amit K. Tevtia, Nikhil Verghese, Gilles Lubineau
Summary: Electroless plating is the default industrial process for depositing glossy metallic coatings on ABS plastic parts, but it requires harsh acid etching of the polymer, resulting in hazardous chemical waste. This study develops a theoretical model to understand the coating failure modes at the micro-nano structured interface and validates it through nanofabrication experiments. The results allow for control and optimization of the adhesion strength at the metal-polymer interface for greener electroless plating and durable coating adhesion.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Multidisciplinary Sciences
Roisul Hasan Galib, Yanpei Tian, Yue Lei, Saichao Dang, Xiaole Li, Arief Yudhanto, Gilles Lubineau, Qiaoqiang Gan
Summary: Global warming exacerbates heat stress, posing a threat to human and social sustainability. To efficiently cool down, reliable and energy-efficient cooling methods are highly desired. Researchers have developed a polyacrylate film made from a self-moisture-absorbing hygroscopic hydrogel for efficient hybrid passive cooling. This film utilizes sodium polyacrylate, one of the lowest-cost industrial materials, to achieve radiative cooling by reducing solar heating and maximizing thermal emission. The manufacturing process uses atmospheric moisture only, without the need for additional chemicals or energy consumption, making it an environmentally friendly process. Under sunlight illumination, the film's surface temperature was reduced by 5 degrees C under partly cloudy skies. The film's hygroscopic feature enables evaporative cooling independent of access to clear skies. This hybrid passive cooling approach is projected to reduce global carbon emissions by 118.4 billion kg/year compared to current electricity-powered air conditioning facilities. The film, with its low-cost raw materials and excellent molding feature, can be manufactured through simple and cost-effective roll-to-roll processes, making it suitable for future building construction and personal thermal management needs.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Hussein Nesser, Hassan A. Mahmoud, Gilles Lubineau
Summary: Structural health monitoring (SHM) is essential for ensuring safety in various applications. Traditional sensors have limitations, but a new technology using RFID allows wireless transmission of strain measurement data. The novel sensor based on LC circuit and cracked capacitor electrodes offers a wireless strain sensor with high sensitivity. This wire-free, power-free design can be easily integrated into composites without compromising structural integrity, providing a cost-effective and non-destructive solution for accurate structural health monitoring.
Article
Materials Science, Multidisciplinary
Arief Yudhanto, Alwaleed Aldhirgham, Eric Feron, Gilles Lubineau
Summary: The article introduces the use of classical compression molding process to post-consolidate 3D-printed continuous carbon fiber-reinforced polyamide (CFPA) composites, reducing the voids and studying its influence on microscale parameters (void content) and mesoscale parameters (mechanical properties, plasticity, damage).
FRONTIERS IN 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)
