Article
Mechanics
Chaofeng Han, Baozhong Sun, Bohong Gu
Summary: This study investigates the effects of current injection modes, probing depth, and preform structure on the electric potential distributions in carbon fiber reinforced polymer composites. A linear anisotropic conductivity model was established to show the variations in electric potential distributions. The findings indicate that fiber tow waviness and bridging regions in plain-woven laminates affect the electric conductivities in different directions.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Qingping Sun, Guowei Zhou, Haibin Tang, Zhangxing Chen, Joel Fenner, Zhaoxu Meng, Mukesh Jain, Xuming Su
Summary: This study investigated the failure mechanisms of open-hole cross-ply carbon fiber reinforced polymer laminated composites using integrated experimental tests and computational modeling. Two effective methods were proposed to obtain experimental data more reliably, and the cohesive zone model was calibrated based on these methods. The experimental results were found to be in good agreement with predictions, indicating the effectiveness of the FRMMELS tests in determining mixed-mode fracture criterion.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Textiles
Dongdong Chen, Maozhou Meng, Xiaoyu Sun, Mingzhu Guan, Bing Yang, Shoune Xiao
Summary: In this study, the effects of aging period and temperature on the flexural properties of CFRP laminates were experimentally and numerically investigated. The findings showed that water molecule uptake primarily occurred at the matrix and fiber-matrix interface, leading to different failure mechanisms for different types of laminates. Higher temperature and longer immersion period worsened the performance of the laminates.
FIBERS AND POLYMERS
(2023)
Article
Mechanics
Damjan Banic, Goran Turkalj, Domagoj Lanc
Summary: This paper presents a shear deformable beam model for the nonlinear stability analysis of composite beam-type structures that considers the effects of restrained warping, large rotation, and shear deformation. The incremental equilibrium equations are derived using an updated Lagrangian formulation and Hooke's law is assumed to be valid. The accuracy and reliability of the proposed numerical model are verified on benchmark examples, showing that it is a shear locking-free model.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Rui Zhong, Shuangwei Hu, Qingshan Wang, Bin Qin, Cijun Shuai
Summary: In this study, the vibration investigations on cross-ply laminated closed elliptical shell introducing the effect of symmetrical and unsymmetrical drop-off ply are performed using a Legendre moving least squares (Legendre-MLS) meshfree method. The applicability of the Legendre-meshfree model is clarified by comparing the results with those from archived literature and finite element simulation models. Parametric studies are conducted to explore the influence of structural boundaries, geometric dimensions, and lamination schemes on the vibration properties.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
M. C. Ray, B. K. Jha
Summary: This paper presents the exact solutions for plate type piezoelectric bimorph energy harvesters composed of laminated cross-ply or angle-ply substrate plate. The effects of series and parallel connections of the piezoelectric layers and different parameters on the induced electric potential have been studied.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Fujian Zhuang, Albertino Arteiro, Rodrigo P. Tavares, Pedro P. Camanho, Puhui Chen
Summary: This paper presents the development and validation of a mesoscale numerical model to predict the bearing failure of composite laminates reinforced by unidirectional continuous fibers, focusing on specimens that show a significant non-linear response prior to failure. Thorough analyses and comparisons of the experimental and numerical results show a good correlation of the bearing strengths and overall deformation, as well as good agreement in terms of damage size and damage shape. Relevant limitations include difficulties in predicting the post-peak plateau stresses and the loading displacements in some configurations, setting the stage for additional future research.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Omer Civalek, Shahriar Dastjerdi, Bekir Akgoz
Summary: This article investigates the free vibration and buckling behaviors of CNT-reinforced cross-ply laminated composite plates using FSDT and DSC methods. Parametric study is conducted to analyze the effects of various factors on frequencies and buckling loads.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Chemistry, Multidisciplinary
Shuai Tang, Yu Zhang, Peng Zhao, Runze Zhan, Jun Chen, Shaozhi Deng
Summary: The study focused on enhancing the heat dissipation of few-layer graphene (FLG) by introducing a graphite interlayer between FLG and a tungsten substrate. This approach effectively reduced the temperature and the risk of vacuum breakdown, resulting in improved high-current field emission characteristics of single FLG samples.
Article
Engineering, Manufacturing
X. Wu, J. D. Fuller, M. R. Wisnom
Summary: The study showed that pseudo-ductile thin-ply angle-ply laminates can withstand 106 cycles under 80% yield stress without obvious damage or stiffness reduction. In fatigue loading with pre-fractured 0 degrees plies, a delamination dominated damage mode was observed in both laminates.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Mechanics
Tao Hai, Murtadha M. Al-Masoudy, Saleh Alsulamy, Mohamed Hechmi El Ouni, A. Ayvazyan, Abhinav Kumar
Summary: This research investigates the size-dependent forced vibration analysis of an embedded cross/angle-plies laminated composite nanoplate on a viscoelastic foundation under a moving load. The governing motion equations are derived using the Hamiltonian principle based on a four-variable refined higher-order shear deformation theory (RHSDT) and the Eringen nonlocal differential model (ENDM) to predict the size-dependent effects. A time-dependent system of state-space and an analytical solution method are implemented to solve the equations for the first time, examining the effect of lay-up numbers and sequences, fiber orientations, elastic/viscoelastic foundation coefficients, and nanoplate geometries on the size-dependent dynamic response of the laminated composite nanoplate under a moving concentrated load with different velocity and time history.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Murat Demiral, Fethi Abbassi, Tamer Saracyakupoglu, Mohamed Habibi
Summary: This study investigates the physics of abrasive water jet cutting of cross-ply CFRP laminate and develops a numerical model for the process. The research shows that different process parameters have an impact on the damage characteristics and delamination performance of the composite plate.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Fredrik Lundstrom, Kenneth Frogner, Mats Andersson
Summary: This study demonstrates how to simulate the temperature distribution during induction heating of woven fabric-based CFRP using a finite element model, with good agreement between the simulated and measured temperature distributions for plates with different fiber volume fractions.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Textiles
Chaofeng Han, Baozhong Sun, Bohong Gu
Summary: The study investigated the electric conductivity and surface potential distributions of carbon fiber laminated panels with different ply orientations. The results showed that the surface potential distributions mainly depend on the surface lamina direction, while the conductivity along the thickness direction depends on each lamina and inter-laminar bonding. The CP and QI laminates with 0 degrees surface ply exhibit uniform potential distributions and isotropic electricity behaviors.
TEXTILE RESEARCH JOURNAL
(2022)
Article
Materials Science, Composites
Farzad Sharifpour, John Montesano, Ramesh Talreja
Summary: Three-dimensional computational micromechanical models were developed to study local failure mechanisms and early-stage ply crack formation in a carbon fiber/epoxy cross-ply laminate under tensile loading. The effects of ply constraints on energy densities in the matrix were evaluated. Brittle cavitation was found to be the dominating failure mechanism, while local inelastic deformation indirectly influenced the number and location of cavitation sites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
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)