Article
Mechanics
Qianqian Wu, Shaojie Hu, Xiaohan Tang, Xin Liu, Zongbing Chen, Jian Xiong
Summary: The compressive buckling and post-buckling behaviors of J-type composite stiffened panels before and after impact load were investigated through theoretical, numerical, and experimental methods. The load-bearing characteristics of intact and damaged panels were predicted and tested, and the effects of impact damage on panel behavior were revealed through numerical simulation. The study also examined the influence of adhesive layer, lay-up method, and geometric dimensions on structural behavior. The research provides useful suggestions for improving panel performance.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
K. S. van Dooren, B. H. A. H. Tijs, J. E. A. Waleson, C. Bisagni
Summary: Two aeronautical thermoplastic composite stiffened panels were analyzed and tested to investigate their buckling behavior, skin-stringer separation, and final failure mode. Finite element analysis using the virtual crack closure technique was conducted before the test to predict structural behavior. During the tests, the panels' deformation was measured by digital image correlation, and the damage propagation and final failure were recorded by cameras. The test results were compared to the numerical prediction and showed great agreement.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
A. Lopatin, E. Morozov, A. Shatov
Summary: This paper considers the buckling of a biaxially compressed anisogrid stiffened composite cylindrical panel with clamped edges. The analysis is based on modeling and using the engineering theory to derive an analytical formula for the critical compressive buckling load. The results of calculations have been verified by finite-element analyses.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Engineering, Aerospace
Wenbin Zhou, Zhusheng Shi, Yong Li, Qi Rong, Yuansong Zeng, Jianguo Lin
Summary: A new method is proposed in this study for the elastic-plastic buckling analysis of stiffened panels under global bending. Finite element modeling was carried out to study the buckling behavior, with results showing good agreement between FE and DT results and the effects of geometric parameters were analyzed.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Ang Peng, Jian Deng, Deng'an Cai, Tao Ren, Dake Wu, Guangming Zhou, Xinwei Wang
Summary: The impact location has a significant influence on the damage behavior and residual performance of composite stiffened panels. The study shows that impact at the skin center has little effect on residual performance, while impact at the flange tip leads to early buckling and compression failure of the local skin.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Marine
Shen Li, Do Kyun Kim, Simon Benson
Summary: This paper investigates the effect of welding-induced residual stress on the strength of stiffened panels and finds that residual stress significantly reduces the ultimate compressive strength of the panels. The study concludes that residual stress in the plate causes a reduction in strength regardless of failure modes, while residual stress in the stiffener web dominates the strength reduction in cases of collapse due to beam-column buckling. The modified edge function approach is shown to be conservative compared to numerical results and is applicable only to stocky panels.
Article
Engineering, Marine
Zhaoqi Yang, Xinhu Zhang, Guang Pan, Yongqiang Xu
Summary: An experimental method was used to investigate the buckling pressure and failure strength of unstiffened and ring-stiffened fiber reinforced composite cylindrical shells under external hydrostatic pressure. Strain and pressure data were collected and analyzed, and FE simulation models were employed for comparison. The results showed that the ring-stiffened structure significantly improved buckling pressure compared to increasing failure pressure. The experimental burst pressure of the ring-stiffened cylindrical shell increased by 23.2%. The buckling mode was changed and buckling behavior was improved and eliminated by the ring-stiffened structure before cylinder burst under hydrostatic pressure load.
Article
Materials Science, Multidisciplinary
Sarmila Sahoo
Summary: The present study investigates the buckling characteristics of cut-out borne stiffened hyperbolic paraboloid shell panel made of laminated composites. The study found that different parametric variations and the properties of composite materials have significant influence on the panel buckling load.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2021)
Article
Engineering, Civil
Wenbin Zhou, Zhusheng Shi, Qi Rong, Xuepiao Bai, Yuansong Zeng, Jianguo Lin
Summary: Experimental and numerical studies have been conducted on the buckling behaviour of stiffened panels under four point bending during creep age forming (CAF) for the first time in this research. The results obtained from experiments and finite element simulations show that the buckling mode, strain distribution, and strain evolution of the stiffened panel can be accurately predicted using the non-linear FE method. The findings of this study can be used to guide the structural design of stiffened panels in cold forming and CAF processes.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Felipe Piana Vendramell Ferreira, Konstantinos Daniel Tsavdaridis, Carlos Humberto Martins, Silvana De Nardin
Summary: This paper investigates the buckling and post-buckling analyses of composite cellular beams through experimental tests to calibrate the numerical model. For symmetrical sections, the end post is a key parameter, with smaller opening diameter resulting in greater global shear; height variation has minimal impact on larger diameters and widths. In asymmetric sections, web post buckling does not occur in the first buckling mode, with an increase in global shear observed with height variation.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Douglas Conrado da Silva, Mauricio Vicente Donadon, Mariano Andres Arbelo
Summary: A semi-analytical model for buckling analysis of stiffened composite panel with debonding defect, subjected to in-plane shear load is developed and verified. The proposed model is an efficient and accurate design tool that can be used in the prediction and identification of critical design scenarios for damage tolerant aerostructures.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Max Krause, Pawel Lyssakow, Kai-Uwe Schroeder
Summary: Stringer frame stiffened shell structures are widely used in aerospace applications due to their high load carrying capacity. However, the design of such structures is challenging and requires consideration of interdependent design variables and the computational cost of panel instability calculations. This study presents an efficient approach that improves the prediction of panel instability by modifying the structural model, converting the Ritz formulation to a finite element formulation, accounting for skin buckling effects, and using an iterative calculation routine. The suggested adjustments lead to significant improvements in the method and accurate predictions of panel instability.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Kenji Asakawa, Yoshiyasu Hirano, Kwek-Tze Tan, Toshio Ogasawara
Summary: In this study, a biomimetic approach is used to determine the arrangement of stiffeners in stiffened composite panels by utilizing Voronoi diagrams. An optimization algorithm combining genetic algorithm and finite element method is developed to optimize the position of generator points in the Voronoi diagram for buckling under compression and shear load. The results demonstrate that the optimized panel with periodical stiffener shapes designed using Voronoi diagrams has a higher buckling load compared to conventional panels, indicating the effectiveness of this biomimetic design approach for stiffened CFRP panel structures.
COMPOSITE STRUCTURES
(2024)
Article
Engineering, Civil
Hamda Chagraoui, Tarek Lazghab, Mohamed Soula
Summary: This paper investigates the effect of a new sub-structural configuration (omega sub-stiffener) on the buckling and post-buckling performance of an existing T-stiffened composite panel design. An optimization framework is proposed to optimize the distribution of omega sub-stiffeners, the laminate stacking sequences, and the ply orientation angles of omega sub-stiffened composite panels to yield higher initial buckling performance without adding mass. Results show that introducing omega sub-stiffeners into the T-stiffened composite panel can result in an increased initial buckling performance (+242.63%) and alters the failure behavior and further affects the initiation and propagation of various failure modes.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Fernando Goncalves Garcia, Roberto Ramos Jr
Summary: This study utilizes parametric finite element models to generate design charts for predicting the local buckling behavior of integrally web-stiffened panels subjected to uniaxial compressive loads. The proposed models are validated through numerical and experimental comparisons, revealing a significant increase in local buckling stresses for filleted panels.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Mechanical
R. Galatolo, D. Fanteria
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2017)
Article
Mechanics
Torquato Garulli, Anita Catapano, Marco Montemurro, Julien Jumel, Daniele Fanteria
COMPOSITE STRUCTURES
(2018)
Article
Engineering, Multidisciplinary
L. Boni, D. Fanteria, L. Lazzeri, E. Panettieri, U. Mariani, M. Rigamonti
COMPOSITES PART B-ENGINEERING
(2018)
Article
Materials Science, Composites
Marco Montemurro, Michele Iacopo Izzi, Jalal El-Yagoubi, Daniele Fanteria
JOURNAL OF COMPOSITE MATERIALS
(2019)
Article
Mechanics
F. Danzi, D. Fanteria, E. Panettieri, M. C. Mancino
COMPOSITE STRUCTURES
(2019)
Article
Materials Science, Composites
Torquato Garulli, Anita Catapano, Daniele Fanteria, Julien Jumel, Eric Martin
JOURNAL OF COMPOSITE MATERIALS
(2020)
Article
Operations Research & Management Science
Enrico Panettieri, Marco Montemurro, Daniele Fanteria, Francesco Coccia
JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS
(2020)
Article
Engineering, Aerospace
Michele I. Izzi, Marco Montemurro, Anita Catapano, Daniele Fanteria, Jerome Pailhes
Summary: This work presents a design strategy for optimising thin-walled structures based on a global-local finite element modelling approach, characterized by a multi-scale optimization method. The strategy involves formulating a constrained nonlinear programming problem and evaluating mechanical responses at both global and local scales to achieve the least-weight design of a structure. Integrated global and local FE models are interfaced with a metaheuristic algorithm, with refined local FE models automatically created for critical regions during global analysis. The entire process is highly automated and does not require user intervention once set up.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Mechanics
F. Bovecchi, L. Boni, D. Fanteria, L. Lazzeri
Summary: The study investigates fatigue growth and shape evolution of a corner crack in a pin-loaded hole by means of three-dimensional FE analyses, reproducing experimentally measured crack front shapes through tuning the constraint factor/plasticity-induced crack closure strategy, and quantitatively determining the LEFM acceptability regions using elastic-plastic simulations. It assesses the sensitivity of crack propagation and shape evolution to various factors, such as stress distribution, relationship between J-integral and stress intensity factor, and changing propagation rates along different directions, with the proposed approach producing very accurate results in terms of crack propagation rate and shape evolution.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Composites
F. Danzi, R. P. Tavares, J. Xavier, D. Fanteria, P. P. Camanho
Summary: This study investigates the potential of a ply-level hybridization technique in carbon/epoxy composite materials to promote pseudo-ductile failure and enhance fracture toughness. The results show that while the hybridization can lead to pseudo-ductile failure in tension, the increased fracture toughness is mainly attributed to the ply-thickness effect.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Mechanics
Mathilde Zani, Daniele Fanteria, Anita Catapano, Marco Montemurro
Summary: This study presents a consistent energy-based cohesive zone model for simulating the mode I delamination behavior of FUMD laminates and validates the effectiveness of the model through experiments. The numerical simulations closely replicate the delamination behavior of DCB specimens, but with some differences compared to experimental results.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Luisa Boni, Daniele Fanteria, Luigi Lazzeri, Ugo Mariani, Marco Rigamonti
Summary: This study evaluates the delamination onset condition of various composite material systems under constant amplitude cyclic loading through experiments. The normalized curves show a common trend and allow the identification of onset values for evaluating defects tolerance in the no growth approach.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Proceedings Paper
Mechanics
E. Monaco, N. D. Boffa, T. Garulli, F. Ricci, D. Fanteria
HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS IX
(2020)
Article
Materials Science, Composites
Torquato Garulli, Anita Catapano, Daniele Fanteria, Wenyi Huang, Julien Jumel, Eric Martin
COMPOSITES SCIENCE AND TECHNOLOGY
(2020)
Article
Materials Science, Composites
D. Fanteria, L. Lazzeri, E. Panettieri, U. Mariani, M. Rigamonti
COMPOSITES SCIENCE AND TECHNOLOGY
(2017)
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)
