Review
Mechanics
Xiao-Yi Zhou, Sheng-Yu Qian, Neng-Wei Wang, Wen Xiong, Wen-Qing Wu
Summary: This study provides a comprehensive review of multiscale uncertainty quantification techniques for fibre reinforced polymer (FRP) composites. It covers the sources of uncertainty, prediction of effective material properties with uncertainties, and probabilistic structural analysis.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Bing Wang, Guodong Fang, Hongyue Wang, Jun Liang, Fuhong Dai, Songhe Meng
Summary: The study investigates the woven composite twisted structure under cantilever load using experimental and multiscale numerical methods. Uncertain geometry parameters are identified and quantified using Micro-CT scanning technology. Furthermore, statistical uncertainty quantification and propagation are integrated into the coupled Finite Element-Fast Fourier Transformation (FE-FFT) concurrent multiscale method to reveal the damage and failure mechanisms of the structure.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Jisiyuan Cheng, Yingjie Xu, Weihong Zhang, Weiwei Liu
Summary: This study uses a novel multiscale framework to evaluate the delamination behaviors of z-pinned composites considering the effects of z-pin/composite interfacial cracks. Unit cell models and macroscale models are used to predict the behaviors of z-pinned composites under different loading conditions and the impact of interfacial cracks on the microscale bridging mechanisms of individual z-pins. The study suggests that it is theoretically possible to customize the bonding properties, surface roughness, and curing temperature to optimize the delamination properties of z-pinned composites.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Manufacturing
James M. Maguire, Nathan D. Sharp, R. Byron Pipes, Conchur M. O. Bradaigh
Summary: Numerical modelling is used to simulate the manufacturing process of thick-section composite laminates, and different thermal cycles are explored to reduce thermal and cure gradients. The study shows the successful application of low exotherm epoxy powders and vacuum bag process in glass and carbon fiber systems, and determines the optimum thermal cycle. Additionally, energy efficient and cost-effective alternative heating methods are investigated.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
Lei Ge, Huimin Li, Yihang Gao, Ruishen Lou, Kai Liu, Jiehua Zhong, Daining Fang
Summary: This paper investigates the effects of manufacturing-induced pore defects on the mechanical behavior of 3D braided composites and establishes two different multiscale modeling methods. The parametric analyses reveal the decisive influence of void content on the elastic properties, while the effects of fiber distribution on the elastic behavior of yarns are limited.
COMPOSITE STRUCTURES
(2022)
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
Benke Shi, Zhongmin Deng
Summary: This study considers the geometric uncertainties of composite structures and uses deep learning to develop a convolutional neural network (CNN) that can link geometric uncertainties and the randomness of structural responses or performances. The proposed method is validated through numerical simulations and analysis.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Industrial
E. C. Rodriguez Pila, C. Guillebaud, H. Wargnier, N. Perry II
Summary: Choices in the design phases of multiscale structures are guided by integration of knowledge on parameters at different scales, and this work aims to rationalize modeling costs by considering uncertainties and controlling parameter uncertainties at the structure scale.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2022)
Article
Mechanics
Jun-Hyok Ri, Un-Il Ri, Hyon-Sik Hong
Summary: A cluster-based nonuniform transformation field analysis method for elastic-viscoplastic composite is proposed, which reduces the number of integration points needed for the local constitutive relation and improves the prediction accuracy and computational efficiency of the effective behavior of composite materials.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Su Tian, Wenbin Yu
Summary: In this work, the Gaussian process is proposed to approximate the overall shape of the initial failure envelope in the space of sectional forces and moments of composite beam cross-sections, using Tsai-Wu failure criterion for strength analysis at the material level. The adaptive sampling technique is used to select training data and the predicted variance scaled by predicted mean is used as a measure of the score to select the most promising point as the new sample for the next training iteration.
COMPOSITE STRUCTURES
(2021)
Article
Mathematics, Interdisciplinary Applications
A. S. Nemov, A. Borovkov, B. A. Schrefler
Summary: A computationally effective approach to multiscale thermoelastic modelling of composite structures is applied to the thermomechanical analysis of two ITER superconducting strands. The method solves homogenisation and recovering problems using the fundamental solutions method. A general procedure of multiscale analysis is described and applied to recover stress at the microscopic scale.
COMPUTATIONAL MECHANICS
(2022)
Article
Engineering, Civil
Da Chen, Shahed Rezaei, Philipp L. Rosendahl, Bai-Xiang Xu, Jens Schneider
Summary: This paper combines finite element homogenisation and structural assessments to conduct multiscale modelling of laminated functionally graded porous beams made of closed-cell foams. The study focuses on the beam buckling and vibration performances. The results show that the relative density is the dominating factor in calculating the foam modulus, and quantitative relations between pore structure and Young's modulus are obtained. The graded porosities in the FG beams contribute to significant increases in beam stiffness.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Mechanical
Lizhe Wang, Liu He, Xiang Wang, Sina Soleimanian, Yanqing Yu, Geng Chen, Ji Li, Min Chen
Summary: In this paper, a multiscale numerical method is proposed to study the effective properties of metal-coated BCC lattices. Parametric studies show that an increase in volume fraction improves the elastic modulus and specific modulus significantly, while an increase in coating film thickness only leads to a monotonously increased elastic modulus. This study provides an effective method for evaluating structural mechanical properties.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ning An, Qilong Jia, Hao Jin, Xiaofei Ma, Jinxiong Zhou
Summary: This paper presents a bottom-up computational strategy that connects the microscopic properties of composites with their macroscopic behavior. It develops a user-friendly plug-in tool in Abaqus to estimate the effective viscoelastic properties of composites and successfully simulates the deployment performance of composite structures.
MATERIALS & DESIGN
(2022)
Article
Engineering, Multidisciplinary
Fei Wang, Li Li, HaiShan Tang, XueLin Wang, YuJin Hu
Summary: The conflict between stiffness and damping in structure-damping materials can be overcome by introducing Ni atoms into the interface of carbon nanotube (CNT) reinforced aluminum-matrix composites. This is due to the gradient variation of modulus and energy dissipation in the effective interfacial zone. A modified rule of mixture, considering the interface contribution, and a gradient damping model, accounting for the interface energy dissipation, are proposed to describe the behavior of the composites. Molecular dynamics simulations confirm the effectiveness of these models in describing different composites with various CNT volume fractions and diameters.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Engineering, Manufacturing
Balazs Varkonyi, Jonathan P-H Belnoue, James Kratz, Stephen R. Hallett
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2020)
Article
Engineering, Manufacturing
Bing Zhang, Luiz F. Kawashita, Stephen R. Hallett
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Materials Science, Multidisciplinary
Jonathan P. -H. Belnoue, Stephen R. Hallett
MATERIALS & DESIGN
(2020)
Article
Mechanics
Antonio R. Melro, Joel Serra, Giuliano Allegri, Stephen R. Hallett
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2020)
Article
Engineering, Manufacturing
Armin Rashidi, Jonathan P. -H. Belnoue, Adam J. Thompson, Stephen R. Hallett, Abbas S. Milani
Summary: An efficient macro-scale finite element approach is introduced to predict defects in the consolidation of carbon fibre woven fabric prepregs, incorporating through-thickness compaction and inter-ply shear behavior. The model also includes a one-dimensional compaction model to describe the compressibility of uncured prepregs, with parameters identified and validated through experiments. Additionally, in-plane and out-of-plane behavior of the woven fabric is captured through hybrid membrane and shell modeling, demonstrating applicability to industrial case studies.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Oriol Gavalda-Diaz, Riccardo Manno, Antonio Melro, Giuliano Allegri, Stephen R. Hallett, Luc Vandeperre, Eduardo Saiz, Finn Giuliani
Summary: In this study, stable interfacial crack propagation in SiC/BN/SiC CMCs was achieved using in situ micromechanical testing in the scanning electron microscope. The critical energy release rate of the BN-fiber interface in Mode I and II was found to be lower than that of the fiber, explaining the generalized fiber debonding observed in the fracture of these CMCs. This work highlights possible routes for the optimization and modeling of the new generation of CMC interphases.
Article
Materials Science, Composites
Xiaochuan Sun, Jonathan P-H Belnoue, Wei-Ting Wang, Byung Chul Kim, Stephen R. Hallett
Summary: Automated Fibre Placement (AFP) is efficient for large-scale deposition of composite prepreg materials, but not ideal for manufacturing small/medium complex parts. A new method of creating flat tailored preforms from steered fiber tows before forming them into 3D shapes has shown feasibility in reducing deviation and defects in manufacturing processes. This new virtual 'un-forming' process has demonstrated potential for improving manufacturing routes.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Mario A. Valverde, Jonathan P-H Belnoue, Robert Kupfer, Luiz F. Kawashita, Maik Gude, Stephen R. Hallett
Summary: This study introduces a methodology for characterizing thermoplastic composite materials under rapid processing conditions, with significant deformations observed during high temperature experiments. A phenomenological material model developed for toughened thermosets was applied and Finite Element simulations were conducted on compacted specimens.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Composites
Bing Zhang, Stephen R. Hallett, Giuliano Allegri
Summary: This paper explores a novel technique for sensing delamination in through-thickness reinforced composites using electromagnetic induction. By utilizing ferromagnetic Z-pins and coils, this method is able to avoid potential interferences from contact electrical resistances and has been demonstrated to be viable in bridging tests. The sensitivity of the magnetic-based sensing technique increases with loading rate and is capable of detecting both mode I and mode II delamination events.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
Jagan Selvaraj, Luiz F. F. Kawashita, Stephen R. R. Hallett
Summary: A computationally efficient method for discrete modelling of cracks in laminated composite structures using explicit time integration is proposed. The method addresses the challenges of discrete crack modelling by employing mixed time integration or subcycling, and minimizing the impact on the surrounding stress field through nodal force balance.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Mechanics
Bing Zhang, Giuliano Allegri, Stephen R. Hallett
Summary: This paper presents a novel numerical technique for modelling fatigue delamination growth in fibre reinforced composites. The simulation approach can describe fatigue delamination under various loading conditions. The method combines twin cohesive zone models with an artificial neural network. The application of this technique has been successfully demonstrated through verification and validation.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Manufacturing
A. D. Cochrane, J. Serra, J. K. Lander, H. Boehm, T. Wollmann, A. Hornig, M. Gude, I. K. Partridge, S. R. Hallett
Summary: Significant research has been conducted on the small-scale failure behavior of Z-pinned composite laminates, but little work has been done on the large-scale, high strain-rate behavior of Z-pinned composites at the structural level. Small-scale testing is not sufficient to fully study the crack bridging effects of Z-pins, while full-scale testing on real components is difficult due to complex geometries and failure mechanisms. A novel cantilever soft body impact test has been developed to study the behavior of Z-pin arrays under high strain-rate conditions.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Tharan Gordon, Xiaodong Xu, Michael R. Wisnom, Stephen R. Hallett, Byung Chul Kim
Summary: This paper presents an experimental investigation into the effect of scarfed ply drops on the low velocity impact response of carbon/epoxy laminates. It was found that the scarfed ply drops reduced stress concentrations and prevented fibre breakage. Furthermore, laminates with scarfed ply drops exhibited less delamination and internal matrix cracking, indicating higher damage resistance compared to laminates with conventional ply drops.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Mechanics
Kilian Gruebler, Daniel Thomson, Nik Petrinic, Michael R. Wisnom, Stephen R. Hallett
Summary: A study was conducted to examine the impact of multi-axial stress states and reinforcement type on the constitutive response of fibre reinforced epoxy polymers using both experimental and numerical methods. The study investigated the constitutive behavior of carbon and glass fibre reinforced epoxy resin under different stress states. The experiments were simulated using an enhanced non-linear material model that accurately represented the elastic and plastic behavior. The results demonstrated that the fiber reinforcement type and multi-axial stress state significantly influenced the overall constitutive response.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Pok Lam Marvin Lau, Jonathan P-H Belnoue, Stephen R. Hallett
Summary: This paper presents a novel methodology that can automatically detect and isolate individual ply information within a low-resolution composite laminate image. The method can quickly process the image and create accurate geometric models with minimal user interaction. The generated finite element models can be used for structural and strength simulations to analyze the impact of waviness defects.
COMPOSITES AND ADVANCED 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)