Article
Engineering, Multidisciplinary
Christoph Boehm, Blaz Hudobivnik, Michele Marino, Peter Wriggers
Summary: This work presents a study on the computational homogenization of electro-magneto-mechanically coupled problems through the Virtual Element Method (VEM), showing that VEM outperforms FE for all considered materials. Additionally, a hybrid microstructure made up by both electro-mechanical and magneto-mechanical grains is investigated resulting in an electro-magneto-mechanically coupled microstructure where VEM provides a more accurate solution strategy.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Ivano Benedetti
Summary: This article proposes a grain scale framework for thermo-elastic analysis and computational homogenization of polycrystalline materials. The morphology of crystal aggregates is represented using Voronoi tessellations, retaining the main statistical features of polycrystalline materials. The behavior of individual grains is modeled using an integral representation for anisotropic thermo-elasticity and numerically addressed through a dual reciprocity boundary element method. The framework simplifies meshing and reduces computational costs, providing a useful tool for multiscale applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Mechanics
Marco Pingaro, Maria Laura De Bellis, Patrizia Trovalusci, Renato Masiani
Summary: This paper discusses the composite materials of polycrystalline materials with inter-granular phases and their complex microstructure, which impact mechanical behavior. They adopt a Fast Statistical Homogenization Procedure and the Virtual Element Method to reduce computational costs, successfully extended to composites with peculiar microstructure.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Rong Chiu, Wenbin Yu
Summary: Heterogeneous Solid Element (HSE) models a heterogeneous body as an equivalent solid element based on Mechanics of Structure Genome (MSG), providing higher accuracy compared to traditional multiscale modeling techniques for composite materials. HSE homogenizes heterogeneous microstructures into equivalent solid elements, introducing a novel concept for multiscale modeling.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Marco Pingaro, Maria Laura De Bellis, Emanuele Reccia, Patrizia Trovalusci, Tomasz Sadowski
Summary: Modern polycrystalline composite materials have a complex internal structure, and the study of their properties is of great significance. Numerical methods can be used to estimate the size and elastic properties of the materials, taking into account the random distribution of grains.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Manufacturing
Frederic Albertini, Justin Dirrenberger, Cyrille Sollogoub, Tobias Maconachie, Martin Leary, Andrey Molotnikov
Summary: The study investigated the influence of a compliant hyperelastic polymeric phase infiltrated in stiff auxetic lattices and found that filling lattices could enhance the specific energy absorption and absorption efficiency of architectural materials, improving their mechanical properties.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Rhodel Bengtsson, Mahmoud Mousavi, Reza Afshar, E. Kristofer Gamstedt
Summary: In this study, a numerical multiscale model is used to investigate the effect of softwood's hierarchical structure on its macroscopic viscoelastic properties. The model is validated using creep behavior experiments on Norway spruce and Japanese cypress. The results demonstrate that by assuming that the variability is greater at the microstructural level, it is possible to predict the macroscopic creep behavior based solely on microstructural parameters, saving time and cost compared to characterizing creep in all material directions.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Matti Schneider
Summary: Polarization-type methods are fast solution methods for FFT-based computational micromechanics, but their performance depends on the choice of the reference material, known optimal-selection strategies only exist for finitely contrasted materials. This study focuses on adaptive strategies for choosing the reference material and introduces a suitable convergence criterion for fair comparison with other solvers.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2021)
Article
Engineering, Mechanical
Marco Lo Cascio, Alberto Milazzo, Ivano Benedetti
Summary: In this work, a hybrid formulation combining the Virtual Element Method (VEM) and the Boundary Element Method (BEM) was proposed for effective computational analysis of multi region domains representing heterogeneous materials. The method simultaneously employs the advantages of VEM and BEM, ensuring high accuracy and efficiency in analyzing multiphase materials.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mechanics
DaJiang Wu, Zhiyuan Mei, Haozhong Hu, Yi Zhu
Summary: This paper proposes an improved asymptotic homogenization method to accurately achieve the homogeneous equivalence of composite sandwich plates with lattice grids (CSPLG). It considers the transverse shear deformation and damping of CSPLG in the equivalent process, obtaining the equivalent transverse shear stiffness and representing the equivalent stiffness using a complex modulus. Numerical examples verify the effectiveness of the improved method in exhibiting the difference in vibration characteristics of different CSPLG, providing convenience for the design of composite sandwich plates.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Chiheb Naili, Issam Doghri
Summary: A predictive micromechanical approach is proposed for porous materials with an elastic-plastic matrix phase. The method determines the volume fractions using a maximum packing argument and computes the effective properties of single hollow solids using an energy-based approach. For reinforced porous materials, a two-level method is adopted. The predictions have been verified against reference full-field FE results and show good agreement.
MECHANICS OF MATERIALS
(2023)
Article
Mathematics, Interdisciplinary Applications
Yuxi Xie, Shaofan Li
Summary: The study introduces a stress-driven homogenization procedure for computing overall effective material properties of elastic composites with locally heterogeneous micro-structures. A novel incremental variational formulation has been developed, and the proposed stress-driven computational homogenization procedure has been implemented with the finite element method to offer lower bound estimates for the materials properties.
COMPUTATIONAL MECHANICS
(2021)
Article
Mechanics
K. B. Shingare, S. Naskar
Summary: This article discusses different micromechanical modelling techniques to determine the effective properties of graphene-based composite materials, highlighting the significant enhancement of properties in graphene reinforced piezoelectric composite materials. The incorporation of graphene into the epoxy matrix greatly enriches the axial, transverse, and shear effective piezoelastic properties of the composite, showcasing excellent agreement with experimental estimates.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Engineering, Multidisciplinary
Damin Xia, Caglar Oskay
Summary: In this manuscript, a reduced order homogenization model is proposed for polycrystalline microstructures with microstructurally small cracks. The approach utilizes eigendeformation-based homogenization method to consider plastic deformation and cracks. A novel method for constructing reduced order basis is proposed to approximate crack opening profiles. A domain partitioning strategy is also proposed to capture variable stress fields around crack tips. The model demonstrates reasonable accuracy and significantly reduces computational cost compared to reference simulations.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Sebastian Gajek, Matti Schneider, Thomas Boehlke
Summary: This work proposes a fully coupled multiscale strategy for components made from short fiber reinforced composites, utilizing deep material networks (DMNs) and a simplified sampling strategy to significantly improve simulation efficiency. The effectiveness of the approach is demonstrated on an injection molded quadcopter frame.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
A. Milazzo, I. Benedetti, V. d Gulizzi
Summary: In this study, nonlocal layer-wise models were formulated for the analysis of magneto-electro-elastic multilayered plates using the Reissner mixed variational theorem. The theories allow for systematic generation of high-order plate theories via layer-based assembly algorithm, ensuring the explicit fulfillment of transverse stress interface equilibrium and enabling straightforward analysis of plates with layers of different characteristic lengths in their nonlocal behavior. Results from Navier solutions for static bending and free vibrations analyses of rectangular simply-supported plates demonstrate the efficacy of the proposed theories against available three-dimensional analytic results.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Francesco Parrinello, Vincenzo Gulizzi, Ivano Benedetti
Summary: The study introduces a three-dimensional framework for low-cycle fatigue analysis of polycrystalline aggregates, utilizing a cohesive law coupling plasticity and damage, and coupling it with a multi-region boundary element formulation. The framework can simulate the cycle-by-cycle degradation of material interfaces up to complete de-cohesion and failure.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Mechanical
Marco Lo Cascio, Alberto Milazzo, Ivano Benedetti
Summary: In this work, a hybrid formulation combining the Virtual Element Method (VEM) and the Boundary Element Method (BEM) was proposed for effective computational analysis of multi region domains representing heterogeneous materials. The method simultaneously employs the advantages of VEM and BEM, ensuring high accuracy and efficiency in analyzing multiphase materials.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mechanics
A. Milazzo, I. Benedetti
Summary: This study introduces a formulation for analyzing impact-induced dynamics in VAT laminated plates, which is implemented and tested. The method utilizes first order shear deformation kinematics and von Karman non-linear strains to develop a discrete system with an impact loading model and an algorithm for solving non-linear governing equations.
COMPOSITE STRUCTURES
(2021)
Article
Mathematics, Interdisciplinary Applications
Marco Lo Cascio, Ivano Benedetti
Summary: The study presented the application of a numerical scheme based on the coupling between VEM and BEM within the framework of CDM to analyze the progressive loss of material integrity in materials with complex microstructures, and validated the proposed method through an artificial microstructure.
JOURNAL OF MULTISCALE MODELLING
(2022)
Article
Mathematics, Interdisciplinary Applications
Francesco Parrinello, Ivano Benedetti
Summary: This study presents a new formulation for analyzing inter-element delamination and fracture propagation problems using hybrid equilibrium elements (HEEs). By developing interface and cohesive zone models within the damage mechanics framework, accurate simulation of element behavior can be achieved.
JOURNAL OF MULTISCALE MODELLING
(2022)
Article
Engineering, Mechanical
F. Parrinello, I. Benedetti
Summary: A novel thermodynamically consistent cohesive-frictional model is proposed for analyzing interface degradation and failure in low-cycle fatigue problems. The model combines plasticity and damage mechanics and captures the evolution of damage and plasticity under external loads. The model accurately simulates the behavior of the interface under different loading conditions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mathematics, Interdisciplinary Applications
Chen Ling, Josiane Nguejio, Riccardo Manno, Luc St-Pierre, Fabrice Barbe, Ivano Benedetti
Summary: Lattice materials have the ability to combine high stiffness, strength and toughness at low density, and the recent development of additive manufacturing technologies has provided new opportunities to improve their properties. This study provides experimental evidence that honeycombs with a density gradient can achieve significantly higher fracture energy compared to uniform honeycombs.
JOURNAL OF MULTISCALE MODELLING
(2022)
Article
Materials Science, Multidisciplinary
D. Campagna, A. Milazzo, I Benedetti, V Oliveri
Summary: This study presents a non-linear analysis method for considering damage initiation and evolution in variable angle tow composite plates under progressive loading. The model is based on first order shear deformation theory kinematics and non-linear strains in the von Karman sense. The constitutive relationships are formulated using continuum damage mechanics, allowing for in-plane damage initiation and evolution in each laminate layer. The Ritz polynomial expansion and minimization of the total potential energy provide the discrete solution equations, which are solved iteratively to capture damage evolution.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Aerospace
Marco Grifo, Andrea Da Ronch, Ivano Benedetti
Summary: A computational framework for high-fidelity static aeroelastic analysis is presented in this paper. The framework combines a high-order structural model with a high-fidelity aerodynamics method, using the Carrera Unified Formulation and Finite Element Method. The aerodynamic fields are solved using the open-source software SU2, and a fluid-structure coupling algorithm based on the Moving Least Square technique is used. The paper provides thorough validation of each disciplinary solver and presents several application test cases. Overall, the method shows good agreement with predictions from potential flow theory for moderate freestream velocities, but deviations are observed at very low speed and in the high-subsonic regime, indicating the need for high-fidelity flow solutions at these conditions. The framework is also applied to the aeroelastic tailoring of a composite wing, and future implementation steps are discussed. Rating: 9/10.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Ivano Benedetti
Summary: This article proposes a grain scale framework for thermo-elastic analysis and computational homogenization of polycrystalline materials. The morphology of crystal aggregates is represented using Voronoi tessellations, retaining the main statistical features of polycrystalline materials. The behavior of individual grains is modeled using an integral representation for anisotropic thermo-elasticity and numerically addressed through a dual reciprocity boundary element method. The framework simplifies meshing and reduces computational costs, providing a useful tool for multiscale applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Mechanics
Marco Grifo, Vincenzo Gulizzi, Alberto Milazzo, Andrea Da Ronch, Ivano Benedetti
Summary: A novel computational approach combining a variable-order kinematics structural model with Computational Fluid Dynamics (CFD) is proposed for static aeroelastic analysis of metal and composite wings in transonic flows. This approach aims to develop a flexible computational aeroelastic framework that can accurately describe flow separation, viscous phenomena, and shock waves in high subsonic, transonic, or supersonic regimes.
COMPOSITE STRUCTURES
(2023)
Article
Mathematics, Interdisciplinary Applications
Marco Lo Cascio, Marco Grifo, Alberto Milazzo, Ivano Benedetti
JOURNAL OF MULTISCALE MODELLING
(2020)
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)