Article
Materials Science, Composites
Hamza Blala, Lihui Lang, Lei Li, Sergei Alexandrov
Summary: FMLs have attracted attention in the advanced industry due to their unique properties, however, traditional forming methods are not suitable for high-volume manufacturing. A cost-effective automated approach for mass production of small parts has been proposed by researchers.
COMPOSITES COMMUNICATIONS
(2021)
Article
Engineering, Manufacturing
Xiao Xiao, Jin-Jae Kim, Seok-Hwan Oh, Young-Suk Kim
Summary: A hybrid incremental sheet-forming technique for carbon fiber reinforced thermosets (CFRTS) was developed and applied, showing promising results for both single- and multi-layer prepregs. Finite element simulations accurately predicted the deformation shape and shear angle of the CFRP sheet during the incremental sheet forming (ISF) process, indicating the effectiveness of the proposed forming strategy.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Composites
Muniyan Vijayan, Velappan Selladurai, Gurusamy Balaganesan, Ganesan Suganya Priyadharshini
Summary: In this research, nanosilica was added to fiber metal laminates (FML) to improve their interfacial bonding and mechanical strength. Various tests and analyses were conducted to examine the effects of nanosilica addition on the FML. The results showed significant improvements in strength and thermal stability with the addition of nanosilica.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Physical
Hang Cheng, Zhiqiang Zhang, Mingwen Ren, Hongjie Jia
Summary: This paper investigates the bending springback behavior of metal/CFRP laminates and determines the optimal curing conditions through experiments and numerical simulations. The results show that the fiber lay-up and metal layer thickness have significant effects on bending springback, while forming speed has a minor influence.
Article
Mechanics
Tiantong Lv, Dengfeng Wang, Xuejing Du
Summary: The study focuses on the parametric modeling and design of CFRP body components for cars. The macroscale design parameters are the structural shape, while the mesoscale design parameters are the lamination schemes. A dual-scale full parametric model is developed by combining the macroscale and mesoscale parametric models. A dual-scale parametric optimization method is established to regulate the performance by switching and matching each scale parameter. The method is applied to the optimal design of a CFRP automotive roof beam, resulting in weight reduction, increased load capacity, and bending stiffness.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Lukas Schell, Erik Sellner, Michael Massold, Peter Groche
Summary: Conventional tribometers have been developed for sheet metal forming at room temperature, but there are challenges in warm and hot forming processes of high-strength aluminum. This study investigates the transferability of friction and wear behavior using three different lubricants and temperatures. Comparison is made between tribometer test results, real forming trials, and thermomechanical finite element simulations to discuss the behavior of different lubricants and tool lubrication characteristics in sheet metal forming.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Composites
Fukai Zhang, Yuan Lin, Jian An Wu, Zhongwei Zhang, Yaxin Huang, Cong Li, Mingyang Wang
Summary: This study investigates the effects of stacking sequence on the low-velocity failure mechanisms and energy dissipation characteristics of carbon fiber reinforced plastics/aluminum hybrid laminates. The results indicate that the plastic deformation of aluminum layers plays a dominant role in energy dissipation. Stacking aluminum layers on the exterior surface can increase absorbed impact energy and reduce fracture behavior.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Physical
Shun-Fa Hwang, Yu-Ren Li
Summary: This study discusses the deep drawing behavior of metal-composite sandwich plates and investigates the suitability of aluminum sheets as face layers. It also explores the preheat effect of aluminum 6061 and the impact of blank-holder pressure on steel sheets. The deformation of fabric composites is examined as well. Overall, the study demonstrates the occurrence of fractures and wrinkles in aluminum-composite sandwich plates and proposes methods to avoid them.
Article
Engineering, Mechanical
Yu Gao, Shiyang Zhu, Huiming Ding, Xiaowen Song, Huanyi Hu, Han Wang, Yinglin Ke
Summary: As ultra-thick laminates are extensively used in aerospace and marine applications, understanding the effect of thickness on their compressive properties is crucial. This study investigates the influence of parameters such as fiber volume fraction, fiber waviness, void content, and free edge effect on the compressive strength of ultra-thick laminates. The results indicate that the fiber volume fraction remains relatively unchanged with increasing thickness, while fiber waviness, void content, and free edge stress significantly influence the compressive strength. Furthermore, the study proposes an empirical relationship between compressive strength and thickness, providing important theoretical and experimental references for the design of ultra-thick composite structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Crystallography
Tomasz Osiecki, Tristan Timmel, Marek Jalbrzykowski, Robert E. Przekop, Zbigniew Oksiuta
Summary: Composite multi-material structures in the automotive industry help reduce the weight of structural elements, save energy, and lower emissivity of toxic gases. Innovative combination of mechanical fit and adhesive improves adhesion between metal insert and fiber-reinforced plastic. The proposed structure shows advantages in mass production of high-stiffness, load-bearing capacity products.
Article
Engineering, Mechanical
Ke Yuan, Kai Liu, Zhonggang Wang, Mingzhi Yang
Summary: This study examined the mechanical behavior of carbon fiber reinforced plastic (CFRP) materials subjected to local loads through experiments and numerical simulations. The results showed that materials in beam shape exhibited higher perforation resistance and more diverse damage patterns compared to square-shaped specimens. The findings were further validated through numerical simulations considering strain-rate effects.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Chemistry, Physical
Selim Mrzljak, Stefan Schmidt, Andreas Kohl, Daniel Huelsbusch, Joachim Hausmann, Frank Walther
Summary: Combining carbon fiber reinforced polymers with steel can utilize the desired characteristics of both materials, but gradual failure in hybrid laminates may affect mechanical properties, requiring a suitable testing procedure for characterization. Residual stresses induced during manufacturing in such laminates were found to impact load-bearing capacity, highlighting the importance of considering this factor in addition to the testing procedure for measuring fatigue performance.
Article
Materials Science, Composites
Saki Hasebe, Ryo Higuchi, Tomohiro Yokozeki, Shin-ichi Takeda
Summary: This study develops a decision tree based multi-task learning scheme to predict impact damage information solely from an external surface profile. Through low-velocity impact tests and damage measurement, a dataset is created to investigate the correlations between impact damage and impact conditions. The results infer that multi-task learning has advantages in prediction accuracy and model plausibility.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
L. Schell, M. Emele, A. Holzbeck, P. Groche
Summary: This paper investigates the temperature influence on friction and wear performance in different lubricant classes and the bonding performance of lubricants to die surfaces. The results provide guidance for future lubricant developments.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Automation & Control Systems
Hamza Blala, Lihui Lang, Shahrukh Khan, Lei Li
Summary: The demand for lightweight materials with structural integrity is growing due to global concerns over air pollution and excessive fuel consumption. Fiber metal laminates (FMLs) show promise in balancing weight reduction and structural reliability, despite limitations in elongation of fibers and existing forming approaches. Research has focused on understanding failure modes, defect elimination, and improving drawability of laminate systems. Comparative studies have been conducted on GLARE material forming behavior using conventional and non-cured laminate methods, showing positive effects on formed cups and depth compared to conventional methods. This investigation aims to enhance FMLs and GLARE part applications over traditional methods.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(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)