{"title":"Investigation of the Impact of Thermo-Stamping, Fiber Orientation, and Metal Thickness on the Formability of Fiber Metal Laminates","authors":"Hamza Blala, Cheng Pengzhi, Zhang Shenglun, Cheng Gang, Ruan Shangwen, Meng Zhang","doi":"10.1007/s10443-024-10250-z","DOIUrl":"10.1007/s10443-024-10250-z","url":null,"abstract":"<div><p>Despite being invented several decades ago, fiber metal laminates (FMLs) still encounter challenges in large-scale manufacturing, especially in forming small and complex-shaped components. These challenges arise from the limited strain rate of the fiber layers compared to the metallic layers. Consequently, conventional approaches to form FML parts are often inadequate. To produce parts free of defects such as fractures and wrinkles, this study investigates the effects of Thermo-stamping (TH-S), in addition to fiber orientation, on the forming behavior of FMLs, employing two different aluminum layer thicknesses. A comprehensive approach combining finite element simulations and experimental analyses was employed. The study investigated thinning of aluminum alloy layers, stress distributions across different layers, and the influence of fiber orientation. The FML blanks are made of a middle woven glass fiber prepreg with a thickness of 0.2 mm, using a thermosetting epoxy system, and Al 2024-T3 alloy sheets with varying thicknesses of 0.3 mm and 0.5 mm. Material behavior was evaluated using Abaqus software, applying the Johnson-Cook criterion for damage initiation in ductile metals and Hashin’s theory for damage initiation in fiber-reinforced composites. These simulations were then compared with experimental results. The findings highlight the potential of the TH-S process to enhance the forming performance of FMLs, particularly evident in the case of the 0°/45° middle layer fiber, which exhibits a higher forming depth and a more uniform thickness distribution. Additionally, a greater flexibility of the glass fiber under the 0°/45° layup compared to the 0/90 layup was detected. This flexibility provides the aluminum layers with more freedom of deformation in the plastic domain. These advancements hold promise for widespread industrial applications of FMLs.</p></div>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"31 5","pages":"1767 - 1789"},"PeriodicalIF":2.3,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of a Flexible Porous GNP-PDMS Composite: Tunable Thermal and Electrical Properties for Novel Applications","authors":"Mohamad-Anas Hejazi, Levent Trabzon","doi":"10.1007/s10443-024-10246-9","DOIUrl":"10.1007/s10443-024-10246-9","url":null,"abstract":"<div><p>The integration of carbon nanomaterials with flexible polymers has received intensive attention as a promising research direction in developing materials with novel properties for advanced applications. Herein, we report on the fabrication and characterization of flexible porous polydimethylsiloxane (PDMS) coated with graphene nanoplatelets (GNPs). We explore the mechanisms affecting its various properties under deformation, and propose new applications for it. The results show lightweight and excellent flexibility characteristics for the obtained GNP-PDMS composite. Measurements of its electrical resistance revealed a change in the electrical resistivity from 2.35 × 10<sup>6</sup> Ω·m to 194 Ω·m under a strain change from 10 to 80% illustrating its ability to shift behavior from an electrical insulator to a relatively low resistivity material and demonstrating the considerable potential for use as a flexible electrical switch. Moreover, the thermal conductivity of GNP-PDMS was found to be significantly enhanced (up to ∼ 110%) by changing the level of compression from 20 to 80%, proving a strain-tunable thermal performance, allowing its utilization as an insulation material of variable conductance for unique thermal management applications.</p></div>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"31 5","pages":"1645 - 1661"},"PeriodicalIF":2.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141575871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haiyang Zhang, Zelin Li, Yichen Deng, Hui Li, Hang Cao, Xiangping Wang
{"title":"Optimal Design Study of Vibro-Acoustic Resistance of Porous Foam Composite Laminates","authors":"Haiyang Zhang, Zelin Li, Yichen Deng, Hui Li, Hang Cao, Xiangping Wang","doi":"10.1007/s10443-024-10241-0","DOIUrl":"10.1007/s10443-024-10241-0","url":null,"abstract":"<div><p>Optimal design study of vibro-acoustic resistance of porous foam composite laminates (PFCLs) is presented in this paper. A dynamic model of the PFCLs subjected to the plane acoustic excitation load is firstly proposed with consideration of upper and lower composite skins and a uniform porous foam. The vibration and acoustic solutions of the PFCLs with acoustic energy excitation are further acquired using the first-order shear deformation theory, the finite element method, the Rayleigh integral approach, the mode superposition technique, etc. Subsequently, a vibro-acoustic optimization model is established by accounting for appropriate design variables and constraints, in which resonance responses, sound transmission losses, and overall structural mass are taken as objective functions, respectively, and the artificial immune clonal selection algorithm is adopted to improve the efficiency in the optimization calculations. After such an algorithm and the current model are thoroughly validated, single-objective, dual-objective, and multi-objective optimizations are undertaken on the PFCLs to achieve the optimal design parameters. The research results indicate that it is hard to enhance the vibro-acoustic resistance and lightweight property of the PFCLs simultaneously, which means some compromise results of design parameters need to be chosen. It is suggested to determine the concerned optimal design results by referring to the nearby turning points associated with the Pareto-optimal solutions.</p></div>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"31 5","pages":"1663 - 1686"},"PeriodicalIF":2.3,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Norman Osa-uwagboe, Vadim V. Silberschmidt, Emrah Demirci
{"title":"Review on Mechanical Performance of Fibre-Reinforced Plastics in Marine Environments","authors":"Norman Osa-uwagboe, Vadim V. Silberschmidt, Emrah Demirci","doi":"10.1007/s10443-024-10247-8","DOIUrl":"https://doi.org/10.1007/s10443-024-10247-8","url":null,"abstract":"<p>Fibre-reinforced plastics (FRPs) are increasingly popular in marine applications, such as boats, offshore wind-power installations, as well as oil and gas offshore systems thanks to their high stiffness, light weight, and damage resistance. This paper aims to examine the recent developments in the investigation of the effects of moisture uptake on the mechanical performance of FRP for maritime applications, to identify the gaps in the literature, and to suggest likely future research directions in this area. While the review is limited to recent studies—within the last two decades, it discusses in detail the current advances in the experimental investigations of moisture uptake on critical mechanical performance including tensile, flexural, shear and viscoelastic properties, thus covering the major quasi-static and dynamic regimes of FRPs subjected to seawater exposure.</p>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Davide Mocerino, Moisés Zarzoso, Federico Sket, Jon Molina, Carlos González
{"title":"A Machine Learning Boosted Data Reduction Methodology for Translaminar Fracture of Structural Composites","authors":"Davide Mocerino, Moisés Zarzoso, Federico Sket, Jon Molina, Carlos González","doi":"10.1007/s10443-024-10236-x","DOIUrl":"https://doi.org/10.1007/s10443-024-10236-x","url":null,"abstract":"<p>This work explored a machine learning (ML) algorithm as a fast data reduction method for translaminar fracture energy in composite laminates. The method was validated with translaminar fracture tests on compact tension (CT) specimens on AS4/8552 and IM7/8552 cross-ply lay-ups. Experimental fracture energy and R-curves for both materials were determined using the most common data reduction methods, such as the compliance calibration (CC), the area (AM) and the Irwin relationship (IM). Our new data reduction method uses a surrogate model based on an artificial neural network (ANN) trained with synthetic data generated with the cohesive crack finite element model. Such a surrogate model maps the cohesive properties with the corresponding load–displacement, crack-displacement and energy-displacement curves with interrogation times in the order of 20 ms and relative errors in the load–displacement and crack growth less than 2%. Such performance enabled its encapsulation to approximate the inverse problem to infer the cohesive parameters with the maximum likelihood estimator (MLE) directly from the experimental load–displacement and crack-displacement curves. The results demonstrated the ability of the model to deliver cohesive parameter inference directly from the macroscopic tests carried out at the laboratory level.</p>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"17 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Response Surface Model for Mechanical Properties of Robotically Stitched Composites","authors":"Radwa Alaziz, Shuvam Saha, Rani W. Sullivan","doi":"10.1007/s10443-024-10245-w","DOIUrl":"10.1007/s10443-024-10245-w","url":null,"abstract":"<div><p>Composite structures are extensively used in several industries such as aerospace, automotive, sports, and construction due to their many advantages, including tailorable mechanical properties, high strength-to-weight ratios, and high specific stiffness. However, due to their low interlaminar tensile and shear strength, composites are prone to delaminations, which can degrade the overall mechanical performance of the structure. Through-thickness stitching provides a third-direction reinforcement to enhance the interlaminar tensile and shear strengths. In this study, quasi-isotropic composite test specimens were manufactured with a novel through-thickness robotic chain stitching with different patterns and tested under uniaxial tensile and three-point bend loadings. A design of experiments (DoE) approach was used to investigate the influence of stitch parameters (stitch density, stitch angle, and linear thread density) on the tensile strength, tensile modulus, and flexural strength of stitched composites. Experimental results are then used to develop a statistically informed response surface model (RSM) to find optimal stitching parameters based on a maximum predicted tensile strength, tensile modulus, and flexural strength. This study reveals and discusses the optimum selection of stitch processing parameters to improve the in-plane and out-of-plane mechanical properties.\u0000</p></div>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"31 5","pages":"1571 - 1591"},"PeriodicalIF":2.3,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Han Lin, Prasad Potluri, William W. Sampson, Arthur N. Wilkinson
{"title":"Nanoplatelet Orientation and Young’s Modulus of Graphene/Phenoxy Nanocomposites","authors":"Han Lin, Prasad Potluri, William W. Sampson, Arthur N. Wilkinson","doi":"10.1007/s10443-024-10243-y","DOIUrl":"https://doi.org/10.1007/s10443-024-10243-y","url":null,"abstract":"<p>We report on the development of phenoxy-graphene nano-composite fibres for improving the toughness of thermoset composites. In this paper, a systematic experimental investigation into the underlying mechanisms of graphene nanoplatelets (GNP) reinforcement of phenoxy nanocomposite fibres prepared via melt spinning is provided. The analysis reveals a tangential orientation of GNP in the outer layer of the fibres, while such orientation is absent in the fibre core region. We show that the relative size of the fibre sheath depends on process variables and exhibits a linear relationship with the modulus of GNP obtained via theoretical analysis using simple rule of mixtures. This is because the area ratio (AR) is proportional to the orientation degree of GNP. This indicates that the enhancement of the Young’s modulus of fibres mainly originates from the increased AR of the fibre sheath layer where the orientation of GNP is more regular.</p>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"51 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zheng Zhang, Tianye Wang, Tao Zhang, Hongcheng Shen, Baisong Pan, Min Sun, Guang Zhang, Shaofei Jiang
{"title":"Large-Deformation Electrothermal Actuation Inchworm-Like Crawling Robot Based on Bistable Structures for Load Carrying","authors":"Zheng Zhang, Tianye Wang, Tao Zhang, Hongcheng Shen, Baisong Pan, Min Sun, Guang Zhang, Shaofei Jiang","doi":"10.1007/s10443-024-10242-z","DOIUrl":"10.1007/s10443-024-10242-z","url":null,"abstract":"<div><p>Crawling robots have great potential in some harsh environments, but there are still some limitations, such as tiny structures that can only produce small deformation and poor load-carrying capacity. A lightweight inchworm-like crawling robot made of bistable structure driven by electrothermal actuation is proposed in this paper. The robot has the characteristics of large deformation and a certain extent of load capacity. The motion of the crawling robot was realized by the common effect of the bistable structure and the designed feet with anisotropic friction. The unstable transition process between snap-through and snap-back processes of the bistable structure was utilized to provide morphological deformation. Meanwhile the feet with anisotropic friction transformed the deformation to unidirectional movement of the crawling robot. Through electric experiments, the electrothermal driving influencing factors of bistable structure are tested, including heating time, maximum temperature and curvature change, which demonstrates the possibility of driving inchworm-like crawling robot with bistable structure and large-deformation. And the structure of the inchworm-like crawling robot assembled by a bistable shell pasted with an electric heating sheet and the designed feet with anisotropic friction. In order to evaluate the motion properties and load-carrying function of the inchworm-like crawling robot, the step length test under different voltages and the experiment of the crawling robot load-carrying capacity were completed. The results show that the crawling robot performs well in load-carrying, can achieve crawling movement under the condition of carrying 10 g and 20 g objects. The inchworm-like crawling robot provides a method to achieve large-deformation and load-carrying and demonstrates it is suitable in some extreme environments.</p></div>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"31 5","pages":"1499 - 1513"},"PeriodicalIF":2.3,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141343314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Experimental Investigation and Numerical Simulation of Bonded, Bolted, and Hybrid Joints in CFRP Laminates Under Tensile Loading","authors":"Yiming Shangguan, Wenjing Wang, Anrui He, Junsheng Qu","doi":"10.1007/s10443-024-10240-1","DOIUrl":"10.1007/s10443-024-10240-1","url":null,"abstract":"<div><p>In this study, an in-depth analysis is carried out to simulate the failure mechanism of T700 carbon fiber-reinforced polymer composite (CFRP) joints with a layup sequence of [45/-45/0/90]<sub>3 s</sub> when subjected to tensile loading, both experimentally and numerically. We compared the mechanical performance of three different edge-to-bolt diameter ratios (E/d) of bonded, bolted, and hybrid single lap joints subjected to tensile loading. A finite element-based progressive damage method (PDM) along with the bilinear triangular cohesive zone model (BTCZM) is developed to predict the damage evolution and failure mechanism for all joint configurations. By juxtaposing the simulation outcomes and the experimental data, we observed the failure morphology and assessed the bearing capacity of the joint under tensile loading. The comparison results revealed a minor discrepancy of merely 5.5% in terms of joint load capacity between simulations and experiments, which indicates the high accuracy of our model. The strength of the adhesive and mechanical joints increases with E/d from 3 to 5; however, the strength of the hybrid joints decreases. At E/d = 3, hybrid joints performed significantly better than bonded ones, with a remarkable enhancement of 41.53%. However, for E/d ratios of 4 and 5, both simulation results and test data showed that hybrid joints were inferior to bolted joints. The analytical methodology presented in this paper offers a valuable reference for future analysis and design of composite joints.</p></div>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"31 5","pages":"1593 - 1624"},"PeriodicalIF":2.3,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mengzhen Li, Carlos Guedes Soares, Zhiping Liu, Peng Zhang
{"title":"Free and Forced Vibration Analysis of Carbon/Glass Hybrid Composite Laminated Plates Under Arbitrary Boundary Conditions","authors":"Mengzhen Li, Carlos Guedes Soares, Zhiping Liu, Peng Zhang","doi":"10.1007/s10443-024-10235-y","DOIUrl":"10.1007/s10443-024-10235-y","url":null,"abstract":"<div><p>This paper presents the theoretical investigations on the free and forced vibration behaviours of carbon/glass hybrid composite laminated plates with arbitrary boundary conditions. The unknown allowable displacement functions of the physical middle surface are expressed in terms of standard cosine Fourier series and sinusoidal auxiliary functions to ensure the continuity of the displacement functions and their derivatives at the structural boundaries. Arbitrary boundary conditions are achieved through the introduction of an artificial spring technique. The first shear deformation theory and Lagrange equations are utilized to derive the energy expression, and the eigenvalue equations associated with free and forced vibration are obtained by Rayleigh-Ritz variational operations. Subsequently, these equations are then solved to determine the natural frequency, mode of vibration, and the steady-state displacement response under forced excitation. The new results are compared with those from references and finite element methods to verify the convergence, accuracy and efficiency of the analytical method. The effects of hybrid ratios, stacking sequences, lamination schemes, fibre orientation, boundary conditions and excitation force on the free and forced vibration behaviours of the carbon/glass hybrid composite laminated plates are analyzed in detail.</p></div>","PeriodicalId":468,"journal":{"name":"Applied Composite Materials","volume":"31 5","pages":"1687 - 1710"},"PeriodicalIF":2.3,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10443-024-10235-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}