Journal of Thermoplastic Composite Materials最新文献

{"title":"Experimental and analytical investigation of the tensile behavior of 3D-printed composites based on micro-CT analysis","authors":"Alp Şık, Hamed Tanabi, H. Evren Çubukçu, Baris Sabuncuoglu","doi":"10.1177/08927057231211226","DOIUrl":"https://doi.org/10.1177/08927057231211226","url":null,"abstract":"Mechanical properties of short fiber reinforced composites manufactured with fused deposition modeling is affected by variables such as printing properties and internal structure of the composite. In this study, the relation between the tensile properties of 3D-printed short fiber reinforced composites, printing orientation and internal structure is inspected. Samples of different printing orientations are manufactured. These samples are inspected under X-ray micro computed tomography (micro-CT) and their fiber orientation distributions and fiber properties are determined. Then, these internal structure properties are applied to analytical material models to estimate the tensile properties of composites. Estimated material properties are compared with tensile test results. It turns out that analytical models that consider internal structure properties provide more accurate estimations than other analytical models that does not take these into account.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"12 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135873768","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":"Damage assessment of laminated composites using unsupervised autonomous features","authors":"Asif Khan, Heung Soo Kim","doi":"10.1177/08927057231208970","DOIUrl":"https://doi.org/10.1177/08927057231208970","url":null,"abstract":"This article proposes a framework for the damage assessment of and effect of temperature variations in laminated composites using Lamb waves and unsupervised autonomous features. A network of piezoelectric transducers is employed to generate data for 18 health states of a laminated composite plate. The data is processed with sparse autoencoder (SAE) for unsupervised autonomous features. The discriminative capabilities of the extracted features are confirmed by processing the feature space in the supervised and unsupervised frameworks of machine learning. The confusion matrices of supervised learning provided physical insights into the problem. The feature space was also visualized in two dimensions in an unsupervised manner through principal component analysis (PCA), which revealed physically consistent results for the effect of temperature variations, damage of different severity levels, and the undamaged paths between the actuator and sensors. The healthy state data and information on the paths between the actuator and sensors was processed via SAE for damage localization. The proposed approach can be employed for the autonomous assessment of composite structures for the presence of damage and variations of operating temperatures while using both supervised and unsupervised machine learning algorithms.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"204 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135933286","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":"Radiation preparation and antimicrobial activity of Poly(PVA/starch/Ag NPs) nanocomposite towards <i>Penicillium digitatum</i> on citrus fruits","authors":"M. Salah, Ehab Ahmed Salem, Ashraf Maher Abdel-Ghaffar, Ismail M. Helal","doi":"10.1177/08927057231211224","DOIUrl":"https://doi.org/10.1177/08927057231211224","url":null,"abstract":"The synthesis of Poly(PVA/St/Ag NPs) nanocomposite by using of gamma radiation was carried out. The progress of the reaction was examined by using different techniques such as Fourier transform infrared (FTIR), transmission electron microscopy (TEM), UV, XRD, and scanning electron microscopy (SEM). The FTIR show the successful preparation of the Poly(PVA/St/Ag NPs) nanocomposite by gamma radiation at a dose of 5 kGy. The TEM analysis displays the particle size distribution of Ag NPs and it is observed that the Ag NPs size was in the range of 21-30 nm. The SEM images show a good distribution of silver nanoparticles in the Poly(PVA/St/Ag NPs) nanocomposite. matrix, but with little agglomerations or aggregates observed on the surface of the Poly(PVA/St/Ag NPs) nanocomposite. The XRD analysis indicates that amorphous regions are enhanced in the Poly(PVA/St/Ag NPs) nanocomposite. The coating of Citrus fruits by of Poly(PVA/St/Ag NPs) nanocomposite showed better performance in inhibition of the growth of P. digitatum on citrus fruits than free Ag NPs at concentration of 30 ppm. The incorporation of Ag NPs in Poly(PVA/St/Ag NPs) nanocomposite has extremely obvious antifungal activities against P. digitatum due to the nanometer range of Ag NPs that can interact with P. digitatum surface and/or its core where it enters inside the cell, as a result, cellular metabolism is inhibited causing death of P. digitatum and subsequently exhibits antifungal activities.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"95 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135933184","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":"Nonlinear thermo-elastic stability of corrugated-core toroidal shell segments with carbon nanotube-reinforced face sheets under radial pressure","authors":"Hoai Nam Vu, Thi Kieu My Do, Minh Duc Vu, Le Ngoc Ly, Nguyen Thi Giang, Nguyen Thi Phuong","doi":"10.1177/08927057231211220","DOIUrl":"https://doi.org/10.1177/08927057231211220","url":null,"abstract":"An analytical approach for nonlinear buckling and postbuckling responses of corrugated-core toroidal shell segments with carbon nanotube (CNT) reinforced face sheets in thermal environment subjected to radial pressure is reported in this work. Three distribution laws of functionally graded CNT-reinforced layers and the trapezoidal and round forms of the corrugated core are investigated. An equivalent technique for corrugated panels is improved by adding thermal forces to model the behavior of the corrugated core. The nonlinear equations are formulated by using the geometrically nonlinear Donnell shell theory considering Pasternak’s foundation. An algorithm to solve a system of nonlinear equations is established using the Ritz energy method with three shell deflection amplitudes. The postbuckling expressions between the compressive and tensile loads with maximal deflection and the critical compressive and tensile loads are determined. The numerically investigated examples present the significantly beneficial effects of corrugated core and functionally graded CNT-reinforced face sheets on nonlinear buckling responses of structures.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"38 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135271058","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":"New mycoparasitic species in the genera <i>Niveomyces</i> and <i>Pseudoniveomyces</i><i>gen. nov</i>. (<i>Hypocreales</i>: <i>Cordycipitaceae</i>), with sporothrix-like asexual morphs, from Thailand.","authors":"N Kobmoo, K Tasanathai, J P M Araújo, W Noisripoom, B Thanakitpipattana, S Mongkolsamrit, W Himaman, J Houbraken, J J Luangsa-Ard","doi":"10.3114/fuse.2023.12.07","DOIUrl":"10.3114/fuse.2023.12.07","url":null,"abstract":"<p><p><b></b> Four new species of the genus <i>Niveomyces</i> are described from Thailand. They were found as mycoparasites on: <i>Ophiocordyceps</i> infecting flies (<i>Diptera</i>) for <i>Niveomyces albus</i>; ants (<i>Hymenoptera</i>) for <i>N. formicidarum</i>; and leafhoppers (<i>Hemiptera</i>) for <i>N. hirsutellae</i> and <i>N. multisynnematus</i>. A new genus, <i>Pseudoniveomyces</i> with two species: <i>Pseudoniveo. blattae</i> (type species), parasitic on <i>Ophiocordyceps</i> infecting cockroaches, and <i>Pseudoniveo. arachnovorum</i>, found on a spider egg sac, are also described. These fungi share a common feature which is a sporothrix-like asexual morph. Based on our molecular data, <i>Sporothrix insectorum</i> is shown to be affiliated to the genus <i>Niveomyces</i>, and thus a new combination <i>N. insectorum comb. nov</i>. is proposed. <i>Niveomyces coronatus</i>, <i>N. formicidarum</i> and <i>N. insectorum</i> formed the <i>N. coronatus</i> species complex found on ant-pathogenic <i>Ophiocordyceps</i> from different continents. <i>Pseudoniveomyces</i> species are distinguished from <i>Niveomyces</i> spp. based on the presence of fusoid macroconidia in culture and a red pigment diffused in the medium, resembling to <i>Gibellula</i> and <i>Hevansia</i>. The molecular phylogenetic analyses also confirmed its generic status. The host/substrates associated with the genera within <i>Cordycipitaceae</i> were mapped onto the phylogeny to demonstrate that mycoparasitism also evolved independently multiple times in this family. <b>Citation:</b> Kobmoo N, Tasanathai K, Araújo JPM, Noisripoom W, Thanakitpipattana D, Mongkolsamrit S, Himaman W, Houbraken J, Luangsa-ard JJ (2023). New mycoparasitic species in the genera <i>Niveomyces</i> and <i>Pseudoniveomyces gen. nov</i>. (<i>Hypocreales</i>: <i>Cordycipitaceae</i>), with sporothrix-like asexual morphs, from Thailand. <i>Fungal Systematics and Evolution</i> <b>12</b>: 91-110. doi: 10.3114/fuse.2023.12.07.</p>","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"35 1","pages":"91-110"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10964586/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73155226","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}

{"title":"An innovative composite elbow manufacturing method with 6-axis robotic additive manufacturing for fabrication of complex composite structures","authors":"Ahmet İpekçi, Bülent Ekici","doi":"10.1177/08927057221109153","DOIUrl":"https://doi.org/10.1177/08927057221109153","url":null,"abstract":"Filament winding method is the most commonly used method to produce profiles with different cross sections as composite product manufacturing. In this method, fiber material is wound with resin at different angles on a mold that has a suitable cross section shape. As a winding strategy, angled and helical winding can be done. Motion planning for this process is done with geodesic and nongeodesic theories. Requirement to use mold in the filament winding method increases the cost. Also, there is an obligation to helical windings. In winding of different layers, 90° angle cannot be given between the layers. To overcome all these constraints, UV curing can be achieved using photopolymer resin and continuous fiber glass fiber with the help of robotic additive manufacturing technology. Toolpath strategies for production has a key role in this work. As a tool path strategy, nonplanar slicing can be done and manufactured composite elbow in angular layers without mold. Then, under favour of 6-axis mobility of the industrial robot arm, layers can be obtained at exactly 90° angle. In addition, in this method, unlike other winding methods, internal voids, i.e. a filling rate, can be given within the cylindrical encircled layers. In order to verify whether the elbows produced with this method meet the requirements of the desired applications in the industry in terms of mechanical properties, at different filling rates (50%, 75%, 100%), winding turns (0 and 1/8), and different fiber densities (45%, 55% and 65%) 90° curved composite elbows were produced and their internal pressure strength tests were tested. Afterwards, an optimization study was carried out with the Taguchi method for the production parameters that will maximize the internal pressure strength. According to the results of the optimization study, it is seen that it is appropriate to choose the printing parameters that will obtain the highest internal pressure strength values for production with this method, 100% fill rate, 65% fiber density and 0° winding angle. The products made of this process have the advantage of easy-shaping, reasonable ratio of axial strength and encircled strength, specification easy-unifying, stable product quality.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"131 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135927885","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":"Biodegradable carboxymethyl cellulose based material for sustainable/active food packaging application","authors":"Mohamed El-Sakhawy, Hebat-Allah S. Tohamy, Mona M. AbdelMohsen, Mostafa El-Missiry","doi":"10.1177/08927057231211236","DOIUrl":"https://doi.org/10.1177/08927057231211236","url":null,"abstract":"This work goal is to develop a valuable biodegradable material for sustainable packaging. The utilization of agriculture wastes to produce biodegradable packaging films based on carboxymethyl cellulose (CMC) will reduce its price. CMC was prepared from sugar cane bagasse, and used to prepare composite films with mandarin and cantaloupe peels extracts of different ratios. The effects of these extracts on the mechanical and antimicrobial properties of the prepared films were evaluated. Thus, the films incorporated with 10% concentration of mandarin and cantaloupe peels extract exhibited excellent antimicrobial properties against gram positive, gram negative bacteria and pathogenic yeast than the other lower concentrated films. The physiochemical properties of each developed biodegradable films were characterized using Fourier Transform Infra-Red (FTIR) spectroscopy, X-Ray diffraction analysis (XRD), Scanning Electron Microscopy (SEM) and antimicrobial. The reflected work is a novel approach, and which is vital in the conversion of organic waste to value-added product development.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"57 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136103849","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":"Reducing fire hazards and enhancing the thermal stability, acoustical, and UV protection of polyvinyl alcohol using bio-based flame retardant","authors":"Aksam Abdelkhalik, Ghada Makhlouf, Tarek M. El-Basheer","doi":"10.1177/08927057231211237","DOIUrl":"https://doi.org/10.1177/08927057231211237","url":null,"abstract":"Polyvinyl alcohol (PVA) is a highly flammable material, and enhancing its flame retardancy to pass the glow wire test is a great challenge. In this work, the melamine salt of tannic phosphate (MTP) was synthesized, characterized, and combined with PVA at 8, 10, 13, and 15 wt%. The thermogravimetric analysis (TGA) results indicated that MTP enhanced the char formation of PVA at 750°C. Flammability tests showed that low concentrations of MTP can enhance the flame retardancy of PVA. The limiting oxygen index (LOI) of PVA increased from 18.8% to 39.9% in the PVA/15%MTP composite. The vertical flame spread test (UL94V) showed that PVA/13%MTP, and PVA/15%MTP composites achieved V0 rating. Glow wire test data indicated that PVA/10%MTP, PVA/13%MTP, and PVA/15%MTP composites had a glow wire flammability index (GWFI) of 960°C/2 mm. Moreover, all the composites passed the needle flame test when the flame application time was 120 s. PVA/15%MTP composite showed very good UV protection and an increase in sound absorption coefficient magnitude compared with pure PVA. The new results can increase the application of PVA in different industries.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"441 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136068500","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 study on preparation and properties of carbon nanotubes-, graphene –natural rubber composites","authors":"Hailong Chen, Nan Chen, Qingqing Ma, Yan He","doi":"10.1177/08927057231211218","DOIUrl":"https://doi.org/10.1177/08927057231211218","url":null,"abstract":"Carbon nanotubes (CNTs-), graphene (GNs)-natural rubber (NR) composites were prepared by wet mixing process and dry mixing process, respectively. Thermal conductivity, 300% tensile stress, tear strength and elongation at break of the samples were measured experimentally. The effects of mixing process, carbon materials content and type on thermal properties and mechanical properties of composites were studied. The experimental results show that, the thermal conductivity of the mixed rubber, the 300% tensile stress and the tear strength of the vulcanizate all increase first and then decrease slightly with the increase of the carbon material content, regardless of the mixing process. However, the elongation at break of vulcanizate showed an opposite trend. When the carbon material content is 2.0% (w.t.%), thermal conductivity, 300% tensile stress and tear strength all reach their maximum, while elongation at break obtains minimum. Under the same amount of addition, GNs is more conducive to improving the thermal conductivity and elongation at break of composites, while CNTs are more conducive to improving the tensile strength and tear strength of composites. For CNTs-, GNs-NR composites, the wet mixing process can greatly improve the thermal conductivity, tensile strength and tear strength of composites, while the dry mixing process can greatly improve the elongation at break of composites. Therefore, when preparing CNTs-, GNs-NR composites, it is necessary to select a suitable mixing process according to the performance requirements of the final product.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"59 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136135849","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":"Enhancing the fiber-matrix interface of r-ABS and bamboo fiber composite developed through melt compounding: An analysis of mechanical and morphological","authors":"Anuj Singh, Aswathy N R, Aswini Kumar Mohapatra","doi":"10.1177/08927057231211481","DOIUrl":"https://doi.org/10.1177/08927057231211481","url":null,"abstract":"In recent years, researchers and scholars have shown growing interest in exploring the applications of natural fibers in polymer composites, driven by their environmentally friendly and sustainable characteristics. This study endeavors to offer an exhaustive examination of the prominent and widely adopted natural fiber reinforced polymer composites and their diverse range of applications. Furthermore, it provides an overview of different surface treatment methods applied to natural fibers and their influence on the properties of, highlighting the significant variations in properties depending on the fiber type, source, and structure. Bamboo fibers (BF) and recycled chemically functionalized acrylonitrile-butadiene-styrene (r-ABS) composites (BF/rABS) have been blended at 190°C. The composites show a higher tensile and flexural properties than r-ABS. The presence of bamboo fibers functions as stress concentrators, resulting in minimized deformation and consequently reducing the impact strength of the composites in comparison to the matrix. The SEM and FTIR analysis have shown that the adhesion between fiber and the matrix is good which therefore improves the tensile properties of the composite materials. XRD analysis has shown improved crystallinity in composite as compared to matrix.","PeriodicalId":17446,"journal":{"name":"Journal of Thermoplastic Composite Materials","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136160274","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}