Article
Materials Science, Multidisciplinary
R. M. R. Panduro, J. L. Mantari
Summary: This paper presents a time-domain viscoelastic formulation based on the Carrera unified formulation (CUF) to obtain the response of composite structures under bending loads. The modified principle of virtual displacement (PVD) is used to derive the governing equations for viscoelastic analysis. The Laplace transform is employed to reduce the computational cost. The results demonstrate the effectiveness of the proposed time-domain viscoelastic formulation, which can be further extended to include thickness stretching effects in future works.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Ali Hosseinkhani, Davood Younesian, Rezgar Shakeri, Saman Farhangdoust
Summary: This paper studies the frequency response of a railway track, including a fractional railpad. A fractional finite element formulation for a compound model including the rail, sleepers, and ballast is derived. The research finds that the frequency responses are remarkably influenced by the fractional parameters in the mid-frequency range.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2021)
Article
Chemistry, Multidisciplinary
Yujia Xiang, Zhiyu Shi
Summary: In this paper, a new method (enclosing-IFEM) is proposed to deal with uncertain parameters in interior vibro-acoustic systems, which can predict the uncertain vibro-acoustic response more accurately. The use of mixed-nodal-element strategy avoids conflicts between the Lagrange multiplier matrix and the coupling sub-block matrix, resulting in more reliable results. The efficiency and accuracy of the method are demonstrated through the analysis of two numerical validation examples, comparing with the results of Monte Carlo approach and other interval finite-element methods.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Marine
Chenyang Li, Wangshen Hao, Wenping Lei, Moyu Liu, Hongxing Hua
Summary: This paper investigates the vibro-acoustic responses of a submerged hull under propeller force. It proposes a technique using the finite element method and the coupling method to model a complex vessel comprising a three-dimensional propeller, shaft, and hull. The results show that the structural excitation from the propeller is the primary way to excite the hull, and the phase difference between the sound radiation from the hull due to structural excitation and that due to acoustic excitation determines the change in sound radiation from the hull.
Article
Engineering, Multidisciplinary
Houbiao Ma, Yahui Zhang
Summary: In this study, a novel efficient 3D vibro-acoustic analysis method, PUFEM-FEM, is proposed, which can analyze multiple frequencies without the need for repeated meshing, while retaining the FEM's ability to model complex structures in great detail.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Multidisciplinary Sciences
Chukwuemeke William Isaac, Stanislaw Wrona, Marek Pawelczyk, Hamid Reza Karimi
Summary: This paper investigates the structural-acoustic response of a lightweight square aluminum panel using numerical methods. Results show that different locations of the primary sound source significantly influence the panel's response to noise reduction, with sources positioned close to the panel reducing the efficiency of noise reduction. Additionally, the study examines the sound distribution profiles at the radiated end of the vibrating panel for different locations of the sound source.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Multidisciplinary
Narendra S. Nanal, Scott T. Miller, Jesse D. Thomas, Lucy T. Zhang
Summary: This study presents a computational framework for simulating shell structures interacting with fluids using the immersed approach. The approach captures the complex movement and motion of thin structures and allows non-intrusive coupling of independent fluid and shell finite element solvers. The method projects the shell structure to create a volumetric structure, enabling accurate and realistic loading and geometry.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Mathematics, Applied
Mohsen Gorakifard, Ildefonso Cuesta, Clara Saluena, Ehsan Kian Far
Summary: The fundamental acoustical properties of the Cumulant LBM were studied, including the propagation of point and planar acoustic waves and spherical waves. The Cumulant LBM was coupled with a Finite Element structural mechanics solver to predict the effects of SPCH on noise generated by cylinders at high Reynolds numbers. The results indicate that SPCH can alter the phase of the vortex shedding cycle, decrease the transversal distance from the center line of shed vortices, and effectively control sound generation in the wake of a cylinder.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Computer Science, Interdisciplinary Applications
Alejandro Cornejo, Alessandro Franci, Francisco Zarate, Eugenio Onate
Summary: This paper introduces a novel coupled formulation for fluid-structure interaction problems involving free-surface fluid flows, fracture phenomena, solid mutual contact, and large displacements. The method combines three different Lagrangian computational methods and has high potential for predicting structural damages caused by natural hazards. It can also be applied to fracture phenomena in structures and soils/rocks arising from explosions or hydraulic fracking processes.
COMPUTERS & STRUCTURES
(2021)
Article
Mathematics, Applied
Jose Querales, Rodolfo Rodriguez, Pablo Venegas
Summary: This paper focuses on the numerical approximation of the displacement formulation of the acoustic eigenvalue problem in the axisymmetric case. It is shown that using lowest order triangular Raviart-Thomas elements may lead to spurious eigenvalues, but an alternative weak formulation is proposed to avoid this issue. A finite element discretization based on the same elements achieves quasi-optimal order spectral convergence and eliminates spurious modes, as supported by numerical experiments.
SIAM JOURNAL ON SCIENTIFIC COMPUTING
(2021)
Article
Mathematics
Nazim Hussain Hajano, Muhammad Sabeel Khan, Lisheng Liu
Summary: In this paper, a monolithic Eulerian formulation is used to solve fluid-structure interaction problems in a nonclassical framework, and the micro-structural characteristics of fluid flow are studied by validating the results with classical benchmark solutions. The results indicate that increasing micro-rotational viscosity leads to significantly large micro-rotations in fluid flow, and the amplitude of oscillations is inversely related to the material parameters c(1) and mu(r). The snapshots of the numerical results at different times and general conclusions drawn from the results are presented.
Article
Engineering, Aerospace
Jie Zhang, Weihua Xie, Yakun Wang, Jiang Zhou, Jiacong Yin
Summary: This paper proposes fast prediction methods for vibrations in specific locations of a satellite subjected to acoustic environment. It introduces vibro-acoustic simulation methods for satellite components, which can represent their conditions in the entire satellite during ground tests or launching. The study shows that these methods can replace the traditional hard modeling and time-consuming whole satellite model when only local responses are of concern. Experimental and numerical studies are conducted, and a vibro-acoustic model of the entire satellite is built and verified. The findings demonstrate a high consistency of the satellite component models and a significant reduction in time compared to the whole satellite model. Recommended fast simulation methods for typical satellite components are provided.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2022)
Article
Mathematics, Interdisciplinary Applications
Carlos Eulogio Flores, Klaus Bernd Sautter, Philipp Bucher, Alejandro Cornejo, Alessandro Franci, Kai-Uwe Bletzinger, Roland Wuechner
Summary: This work presents a modular coupling approach that combines particle methods with the finite element method (FEM). The proposed strategy takes advantage of the particle methods' ability to handle large displacements and deformations, particularly in complex fluid-structure and solid-structure interaction problems. The coupling is achieved through a co-simulation approach implemented in the Kratos Multiphysics framework. The particle methods considered in this work are the discrete element method (DEM) and the particle finite element method (PFEM). Several numerical examples, focusing on natural hazards, are presented to test and validate the proposed method.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Engineering, Mechanical
Lunan Wei, Jun Chen
Summary: This study investigates the use of defect resonance-based vibro-acoustic modulation (VAM) spectroscopy to maximize the nonlinear VAM response of carbon fiber reinforced polymer (CFRP) plates by determining the appropriate pumping and probing frequencies. The authors develop a 3D finite element (FE) model that accounts for barely visible impact damage (BVID) and ultrasonic signal loading, and use the scaling subtraction method (SSM) to identify the optimal frequencies for pumping and probing inputs. Experimental validation using a scanning laser Doppler vibrometer (SLDV) confirms the effectiveness of the proposed numerical methodology. The results demonstrate that selecting the pumping input frequency as the global plate resonance (GPRpump) and the probing input frequency as the local defect resonance (LDRprobe) can improve the maximum response amplitude (MRA) of the VAM sideband, leading to better detection of BVID.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Multidisciplinary
Ingrid S. Lan, Ju Liu, Weiguang Yang, Alison L. Marsden
Summary: The study presents a reduced unified continuum formulation for vascular fluid-structure interaction (FSI), achieving monolithic coupling in the Eulerian frame and improving accuracy through block preconditioning. By utilizing the generalized-alpha scheme and a three-level nested block preconditioner, the method demonstrates robust performance and higher-order temporal and spatial accuracy for clinical applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Erasmo Carrera, Alberto G. de Miguel, Matteo Filippi, Ibrahim Kaleel, Afonso Pagani, Marco Petrolo, Enrico Zappino
Summary: Dealing with composite structures involves a trade-off between accuracy and computational costs, hence the proposal of a global-local method to extract 3D strain and stress fields.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
M. C. Moruzzi, M. Cinefra, S. Bagassi
Summary: The study aims to investigate the potential noise reduction in the passenger cabin of a regional turboprop aircraft, focusing on the acoustic performances of innovative technologies and the impact of removing windows from the cabin. The results suggest that acoustic metamaterials have significant noise reduction capabilities, leading to increased passenger comfort.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Erasmo Carrera, Alberto G. de Miguel, Matteo Filippi, Ibrahim Kaleel, Afonso Pagani, Marco Petrolo, Enrico Zappino
Summary: This paper introduces a user-friendly tool for accurate stress prediction in laminate shell models in ABAQUS, based on a two-step global/local technique and refined laminated theories. Numerical examples demonstrate the tool's capabilities in handling various failure mode onsets.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
M. Corsi, S. Bagassi, M. C. Moruzzi, F. Weigand
Summary: Negative stiffness structures (NSS) are a branch of multi-stable mechanical metamaterials that exhibit multiple stable configurations. They have characteristics like bistability and negative stiffness, making them ideal for shock absorber applications. This study focused on designing, producing, and testing three types of special-shaped NSS to investigate the influence of dimensional parameters and materials on their functionality. The results showed the energy recovery and the influence of dimensional parameters on the response to applied loads.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Aerospace
A. Pagani, R. Azzara, E. Carrera, E. Zappino
Summary: This research presents important results from a test campaign on the Dardo Aspect, emphasizing the reliability of innovative techniques while acknowledging potential calibration and testing preparation issues. These methods, although not suitable for certification purposes, offer significant time and cost benefits.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
M. Corsi, S. Bagassi, M. C. Moruzzi, L. Seccia
Summary: Fused Deposition Modeling (FDM) is an additive manufacturing technology that builds up parts layer by layer, affecting mechanical properties by controlling production parameters. This study analyzes the mechanical properties of specimens produced with different parameter combinations through FDM, specifically focusing on the effect of parameters on ABS Plus p430 material properties.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Mechanics
J. Najd, W. Harizi, Z. Aboura, E. Zappino, E. Carrera
Summary: This study investigates the fatigue limit and damage quantification of PMC materials using electrical capacitance and temperature variations as physical magnitudes. The proposed novel damage estimation curves provide a relatively fast and accurate estimation of the fatigue limit.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Jamal Najd, Enrico Zappino, Erasmo Carrera, Walid Harizi, Zoheir Aboura
Summary: This paper proposes a two-dimensional refined finite element model based on CUF to predict the capacitance variation of embedded piezoelectric sensors. The accurate stress field of laminated structures with embedded sensors is evaluated using refined layer-wise models. A fully coupled electro-mechanical formulation is adopted to predict the piezoelectric response. Results show that the capacitance variation is highly affected by through-the-thickness deformations, which cannot be predicted by classical models.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Chemistry, Analytical
Jamal Najd, Enrico Zappino, Erasmo Carrera, Walid Harizi, Zoheir Aboura
Summary: This paper assessed the use of variable kinematic models in the dynamic analysis of Lamb waves, showing that higher order kinematic models can improve wave propagation accuracy, and node-dependent kinematic models can reduce computational cost.
Article
Multidisciplinary Sciences
Enrico Zappino, Erasmo Carrera
Summary: This paper presents an innovative numerical model for predicting stress concentrations in composite materials in a multi-physics context. The model is based on the Carrera unified formulation and can handle high-order models in different dimensions. The study considers different types of composite materials and utilizes a global-local analysis technique to reduce computational cost while maintaining accuracy.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Engineering, Manufacturing
Martino C. C. Moruzzi, Sandhya Santhosh, Marzia Corsi, Sara Bagassi, Francesca De Crescenzio
Summary: Airports play a fundamental role in the aviation system and air traffic control is considered crucial. The concept of remote and virtual control towers (RVT) has emerged, using technologies like augmented reality, to enhance controller work. This paper elaborates the design of an eye-tracking system using Microsoft Kinect V2 for the virtual control tower application, and evaluates its precision through testing.
INTERNATIONAL JOURNAL OF INTERACTIVE DESIGN AND MANUFACTURING - IJIDEM
(2023)
Article
Engineering, Aerospace
Mohamed Refat, Enrico Zappino, Alberto Racionero Sanchez-Majano, Alfonso Pagani
Summary: This paper presents a study on the free vibration analysis of 3D printed sandwich beams using high-order theories based on the Carrera Unified Formulation (CUF). The study builds an accurate database of first natural frequencies of the beams and predicts Young's modulus based on an inverse problem formulation. The results show that the proposed 1D approach provides accurate 3D analysis of the printed beams with reduced computational costs.
ADVANCES IN AIRCRAFT AND SPACECRAFT SCIENCE
(2022)
Article
Engineering, Aerospace
M. Filippi, E. Carrera, D. Giusa, E. Zappino
Summary: This paper presents a finite element analysis method for helicopter blades made of metallic and composite materials with single and double swept geometries. By combining classical and refined beam theories at the element level using the NDK concept, the accuracy/efficiency ratio of the solution can be adjusted according to the required level of fidelity. Numerical examples demonstrate the flexibility and computational efficiency of the proposed methodology by considering swept-tip rectangular beams and double-swept helicopter blades with realistic airfoils.
JOURNAL OF THE AMERICAN HELICOPTER SOCIETY
(2021)
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)