Journal of Composite Materials最新文献_第3页

Impact of fiber orientation on cutting forces and surface quality in flax/epoxy composite machining 纤维取向对亚麻/环氧复合材料加工中切削力和表面质量的影响

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-08-01 DOI: 10.1177/00219983241271004

Mohamed Slamani, Hamza Chafai, Jean-François Chatelain

{"title":"Impact of fiber orientation on cutting forces and surface quality in flax/epoxy composite machining","authors":"Mohamed Slamani, Hamza Chafai, Jean-François Chatelain","doi":"10.1177/00219983241271004","DOIUrl":"https://doi.org/10.1177/00219983241271004","url":null,"abstract":"Flax/epoxy composites are recognized as an eco-friendly alternative to synthetic fibers in engineering. Understanding how fiber orientation affects cutting forces and surface characteristics is essential for machining these materials. This study investigates the relationship between fiber orientation and cutting forces (feed, normal, passive) as well as surface roughness in flax/epoxy composites. Results show that fiber orientation significantly impacts cutting forces. Cutting parallel to fibers (0° and 90° orientations) generally requires less force, with 0° needing higher normal force. At 0° orientation, feed force is 46.47 N, normal force is 58.86 N, and passive force is 54.44 N. At 90° orientation, feed force is 56.66 N, normal force is 44.68 N, and passive force is 50.95 N. Oblique orientations (45° and −45°) require higher forces, especially 45°, with the highest normal force of 77.95 N. Surface roughness analysis shows 90° orientation results in the lowest average roughness (Ra) of 10.97 µm but the highest surface roughness (Sa) of 34.25 µm. Conversely, 45° orientation has the highest Ra of 14.2 µm but lower Sa of 22.6 µm. Ra and Sa values for 0° orientation are 13.72 µm and 24.6 µm, and for −45° orientation, they are 12.3 µm and 21.8 µm. Correlation analysis reveals significant relationships between cutting parameters and surface quality, with higher feed rates correlating with smoother surfaces (lower Sa and Ra values). Fiber orientation also significantly influences fluffing defects, with 0° orientation minimizing these defects, while 45° and −45° orientations result in varied patterns.","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"22 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimisation of process-induced residual stresses in composite laminates by different genetic algorithm and finite element simulation coupling methods 用不同的遗传算法和有限元模拟耦合方法优化复合材料层压板的工艺诱导残余应力

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-07-31 DOI: 10.1177/00219983241268895

Hong Ma, Robert S Pierce, Justine Beauson

{"title":"Optimisation of process-induced residual stresses in composite laminates by different genetic algorithm and finite element simulation coupling methods","authors":"Hong Ma, Robert S Pierce, Justine Beauson","doi":"10.1177/00219983241268895","DOIUrl":"https://doi.org/10.1177/00219983241268895","url":null,"abstract":"To address the residual stress induced during the cure of fibre reinforced thermoset polymer composites, two different approaches were suggested for coupling a non-dominated sorting genetic algorithm (NSGA-II) with finite element (FE) simulations based on a viscoelastic constitutive law. These two approaches were proposed with consideration of different ways of integrating NSGA-II and the FE model. In Approach A, NSGA-II was performed based on results from a series of simulations under various combinations of cure variables. Alternatively, Approach B employed NSGA-II to iteratively update and optimise the cure profile for subsequent simulations. Results indicated that both approaches achieved simultaneous reductions in cure time and macroscale residual stress, with Approach B showing further improvements due to the direct coupling between the NSGA-II and simulations. Specifically, the maximum residual stress and cure time optimised by Approach A were reduced by 5%–9% and 22%–50% respectively, while those obtained by Approach B were reduced by 7%–10% and 32%–49% respectively, compared to those based on the manufacturer recommended cure profile. The evolution of stress in composites based on optimised cure profiles from these two approaches was also elucidated. Additionally, microscale modelling further revealed a 3%–5% reduction in the average residual stress within a representative volume element (RVE) model was also shown, depending upon the approach adopted. Ultimately, by combining a NSGA-II and FE simulations, the optimisation of cure time and residual stress at the macroscale and cure time together with a reduction of microscale stress could be realised.","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"262 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The nano-clay effect on the improvement of the thermal, flammability, and mechanical behavior of epoxy/glass fiber/ATH hybrid composites 纳米粘土对改善环氧树脂/玻璃纤维/ATH 混合复合材料的热性能、可燃性和机械性能的影响

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-07-31 DOI: 10.1177/00219983241270992

Hamzeh Shahrajabian, Hosein Vaezzadeh

引用次数: 0

Carbon fibre detection in polymer composites reinforced by chopped carbon fibres through digital image processing and machine learning 通过数字图像处理和机器学习检测切碎碳纤维增强聚合物复合材料中的碳纤维

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-07-30 DOI: 10.1177/00219983241268861

Norbert Geier, Gergely Magyar, Jakob Giner, Tamás Lukács, György Póka

{"title":"Carbon fibre detection in polymer composites reinforced by chopped carbon fibres through digital image processing and machine learning","authors":"Norbert Geier, Gergely Magyar, Jakob Giner, Tamás Lukács, György Póka","doi":"10.1177/00219983241268861","DOIUrl":"https://doi.org/10.1177/00219983241268861","url":null,"abstract":"Mechanical and thermodynamical properties and thus machinability of carbon fibre reinforced polymer composites significantly depend on the fibre orientation relative to the load direction. However, the orientations of the fibre groups in polymer composites reinforced by chopped carbon fibres are stochastic; therefore, the properties and machinability of such composites are challenging to plan, predict and optimise. We developed four different and novel approaches for fibre detection in polymer composites reinforced by chopped carbon fibres: (i) detecting the fibres through naked eye supported manual drawing, (ii) digital image processing of optical images, (iii) machine learning-based fibre detection, and (iv) rectangle fitting on the outputs of the automated processes using the Chaudhuri and Samal method. The applicability of the novel approaches was tested through optically captured images of polymer composites reinforced by chopped carbon fibres. The developed methods are each capable of detecting fibre groups at the top and bottom of the composite plate with certain limitations. The rectangle fitting approaches performed the best from the point of view of correctly identifying of fibre groups, followed by the machine learning-based and the conventional digital image processed, respectively. As a result of this study, the machining process planning and condition monitoring of polymer composites reinforced by chopped carbon fibres is more deeply supported.","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"25 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141864002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual influence of graphene oxide/clay and electron beam radiation on the structure, mechanical, thermal, and antimicrobial properties of nitrile butadiene rubber nanocomposite 氧化石墨烯/粘土和电子束辐射对丁腈橡胶纳米复合材料的结构、机械、热和抗菌性能的双重影响

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-07-30 DOI: 10.1177/00219983241268898

Soma A. El Mogy, Hanan Mohamed Eyssa, Rasha Mohammad Fathy, Mahmoud Hamdi Sanad

{"title":"Dual influence of graphene oxide/clay and electron beam radiation on the structure, mechanical, thermal, and antimicrobial properties of nitrile butadiene rubber nanocomposite","authors":"Soma A. El Mogy, Hanan Mohamed Eyssa, Rasha Mohammad Fathy, Mahmoud Hamdi Sanad","doi":"10.1177/00219983241268898","DOIUrl":"https://doi.org/10.1177/00219983241268898","url":null,"abstract":"Infective diseases are becoming more popular, and managing them has become a great worry for humanity. A rubber nanocomposite based on nitrile butadiene rubber with graphene oxide (NBR/GO) and GO/nanoclay (montmorillonite, MMT) (NBR/GO/MMT) was fabricated by a simple technique, roll milling. The synergistic influence of the existence of GO, clay, and electron beam (EB)-radiation on the NBR nanocomposites was characterized using scanning electron microscopy (SEM), and Fourier-transform infrared (FT–IR) techniques to study the mechanical, thermal, and antibacterial properties. The antibacterial activity of the prepared rubber nanocomposites was estimated via the disk diffusion process against Gram-positive bacteria, Bacillus subtilis, Staphylococcus lentus, and Gram-negative bacteria ; Pseudomonas aeruginosa and Proteus mirabilis. The results demonstrated that the physico-mechanical performance was significantly reinforced by incorporating nano GO (6 phr) and clay with GO (3 phr/6 phr. NBR films have no antibacterial potential. GO increases the antibacterial efficiency of the NBR films. NBR/3% GO/3% clay film is the most effective in reducing bacterial growth and B. subtilis was the most sensitive bacteria for rubber treatments. The inhibition zone diameters of the un-irradiated and irradiated NBR/3% GO/3% clay films for B. subtilis were 18.03 ± 0.59 and 25.63 ± 0.98 mm, respectively. It could be concluded that because of its outstanding flexibility and human-body compatibility penetration, rubber in corporation with antimicrobial agents can be utilized for manufacturing medical and environmental products.","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"358 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141864001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Skin thickness effects on failure mechanisms in foam infilled composite sandwich structures 表皮厚度对泡沫填充复合材料夹层结构失效机理的影响

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-07-02 DOI: 10.1177/00219983241265922

Hossein Malekinejad, Amin Farrokhabadi, Gholam Hossein Rahimi, Ricardo Carbas, Eduardo AS Marques, Lucas da Silva

{"title":"Skin thickness effects on failure mechanisms in foam infilled composite sandwich structures","authors":"Hossein Malekinejad, Amin Farrokhabadi, Gholam Hossein Rahimi, Ricardo Carbas, Eduardo AS Marques, Lucas da Silva","doi":"10.1177/00219983241265922","DOIUrl":"https://doi.org/10.1177/00219983241265922","url":null,"abstract":"Sandwich structures are often prone to catastrophic failure due to premature separation between the core and skin layers. Geometric parameters, such as the thickness of the skin and core, along with the materials used in their manufacturing, directly influence the resistance to separation between the skin and core. This study explores how variations in skin thickness affect both failure modes and maximum load capacity in sandwich structures, utilizing both experimental testing and numerical simulations. Specimens were categorized as intact and pre-debonded samples. Each specimen featured four different skin thicknesses (3, 6, 8, and 10 layers of composite laminated skins, with corresponding thicknesses of 0.68, 1.33, 1.73, and 2.1 mm respectively). The specimens incorporated a foam-filled square corrugated core and underwent 3-point bending tests. Results revealed a significant shift in the failure mode: initially observed as upper skin fracture (V-shaped failure), it transitioned to separation between skins and cores with increased skin thickness, particularly in the presence of pre-debonding. Notably, the predominant failure mode did not involve separation between the skin and core in specimens without a pre-existing crack. Furthermore, numerical simulations effectively demonstrated the accurate capture of failure modes and loads using the Hashin and cohesive zone model (CZM).","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"56 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141523752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bolt-bearing behavior of hybrid CFRP-steel laminates at low temperature 低温下 CFRP-钢混合层压板的螺栓承载行为

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-06-22 DOI: 10.1177/00219983241262955

Josef Koord, Christian Hühne

引用次数: 0

Vibration analysis of anisogrid composite lattice sandwich truncated conical shells: Theoretical and experimental approaches 异格栅复合材料晶格夹层截顶锥形壳的振动分析：理论与实验方法

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-06-21 DOI: 10.1177/00219983241264364

Malihe Rahnama, S Reza Hamzeloo, Mohammad Morad Sheikhi

{"title":"Vibration analysis of anisogrid composite lattice sandwich truncated conical shells: Theoretical and experimental approaches","authors":"Malihe Rahnama, S Reza Hamzeloo, Mohammad Morad Sheikhi","doi":"10.1177/00219983241264364","DOIUrl":"https://doi.org/10.1177/00219983241264364","url":null,"abstract":"Drawing upon both theoretical and experimental methodologies, this study investigates the vibrational characteristics of lattice sandwich truncated conical shells featuring composite ribs made of carbon and E-glass fibers. Toward this aim, the equations of motion along with the corresponding boundary conditions of such sandwich shells are derived using classical Donnell’s shell theory and the smeared stiffness technique. Subsequently, the governing equations are solved to obtain a closed-form expression for natural frequencies employing the Galerkin method. In addition, ABAQUS simulations are presented to study the vibration behavior of single-skin and three-skin conical shells. To validate the theoretical methods, the specimens of three-layer sandwich conical shells were fabricated from two Kevlar fabric laminates and a composite lattice core with hexagonal cells using a manual filament winding process. The composite ribs consist of carbon and E-glass fibers with a ratio of 3:1. Finally, experimental modal tests were conducted to extract natural frequencies and mode shapes by measuring frequency responses at 40 points over a duration of 60 s using a laser vibrometer. A strong correspondence is observed between the theoretical outcomes (utilizing the Galerkin and FE methods) and the experimental findings (with a maximum discrepancy of approximately 16% for the initial four mode shapes). Findings indicate that the excellent performance of the composite lattice core in vibration behavior, which can increase approximately 19% and 16% the natural frequencies corresponding to the first and second mode shapes, respectively.","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"22 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of stitching parameters on the flexural properties of stitched foam core sandwich composites 缝合参数对缝合泡沫芯材夹层复合材料弯曲性能的影响

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-06-20 DOI: 10.1177/00219983241265165

Shekoufeh Rasouli Rizi, Hooshang Nosraty, Seyed Abolfazl Mirdehghan

{"title":"Effects of stitching parameters on the flexural properties of stitched foam core sandwich composites","authors":"Shekoufeh Rasouli Rizi, Hooshang Nosraty, Seyed Abolfazl Mirdehghan","doi":"10.1177/00219983241265165","DOIUrl":"https://doi.org/10.1177/00219983241265165","url":null,"abstract":"One of the primary challenges faced by sandwich composites is facesheet-core debonding, which can be mitigated through various techniques such as z-pinning and stitching through the thickness. This study investigates the impact of stitching on the bending behavior of sandwich composites comprising E-glass composite facesheets and a polyurethane foam core, employing experimental, numerical, and analytical methods. Specimens were stitched at three stitch spacings of 0.5, 1, and 2 cm, with a stitch pitch of 0.8 cm and stitch seam angles of 0°, 90°, 0/90°, ±45°, 45°/90°, and ±60°. Analysis of facesheet bending stress, core shear stress, and bending rigidity of stitched specimens was conducted through three-point bending tests and compared with unstitched specimens. Results indicate that reducing stitch spacing, thereby increasing stitch density, improves bending strength, and the best bending behavior observed at ±45° stitch seam angles. Damage assessment revealed fractures and depression of the foam, wrinkles on the upper facesheet, and buckling failure of resin columns. Additionally, a theoretical model predicted bending rigidity, showing good agreement (4%–15%) with experimental data. Finite element analysis using the ABAQUS program validated the experimental results, suggesting numerical modeling as a viable method for predicting flexural properties of stitched foam core sandwich composites.","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"4 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of relaxation behaviour of CF/PEKK aerospace composites using the time-temperature-crystallinity superposition principle 利用时间-温度-结晶度叠加原理表征 CF/PEKK 航空航天复合材料的弛豫行为

IF 2.9 3区材料科学

Journal of Composite Materials Pub Date : 2024-06-01 DOI: 10.1177/00219983241260555

Mariam A. Al-Dhaheri, Wesley J. Cantwell, Imad Barsoum, Rehan Umer

{"title":"Characterization of relaxation behaviour of CF/PEKK aerospace composites using the time-temperature-crystallinity superposition principle","authors":"Mariam A. Al-Dhaheri, Wesley J. Cantwell, Imad Barsoum, Rehan Umer","doi":"10.1177/00219983241260555","DOIUrl":"https://doi.org/10.1177/00219983241260555","url":null,"abstract":"In this study, the Time-Temperature-Crystallinity Superposition Principle (TTCSP) was applied to determine the viscoelastic behavior of Thermo-rheological Complex Materials (TCM), specifically Carbon fibre/Poly-Ether-Ketone-Ketone (CF/PEKK) composites. The study investigated the effects of various parameters on the viscoelastic behavior of the composites, such as the degree of crystallinity after different melting temperatures, relaxation, and crystallization times. The TTCSP was utilized on the relaxation data to generate great-grand master curves for the degree of crystallinity for different laminate lay-ups. Hot press forming was employed to manufacture samples under different processing conditions, including various melting and cold crystallization temperatures. Differential Scanning Calorimetry (DSC) was employed to calculate the degree of crystallinity of CF/PEKK composites, while the Dynamic Mechanical Analyzer (DMA) was used to obtain the relaxation data. The generated great-grand master curves proved effective in predicting the relaxation behavior of the composites consolidated using single and double hold cycles at different melting temperatures and crystallization times, respectively. The great-grand master curves presented in this study can serve as valuable tool to calibrate key viscoelastic and/or thermo-viscoelastic material models for aerospace-grade CF/PEKK composites. These models are crucial for simulations aimed at predicting residual stresses and process-induced deformations during the thermoforming process.","PeriodicalId":15489,"journal":{"name":"Journal of Composite Materials","volume":"37 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141196640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0