Pub Date : 2023-12-04DOI: 10.1088/2631-6331/ad11f7
Chenyang Mao, Lei Liu, Bo Zhou, Xiuxing Zhu, Haijing Wang
Piezoelectric materials are widely used as actuators, due to the advantages of quick response, high sensitivity and linear strain-electric field relationship. The previous work on the piezoelectric material plate structures are not enough, however such structures play a very important role in the practical design. In this paper, the buckling performance of piezoelectric laminated composite plate (PLCP) is analyzed based on static method to parametric study the buckling control. The stress components of the matrix layer are formulated based on electro-mechanical coupling theory and Kirchhoff’s classical laminated plate theory. Buckling differential governing equation of PLCP is obtained by using the equilibrium conditions. The solution of the governing equation is assumed as a sum of a series of trigonometric shape functions, and then its expression is obtained by using static method. The effectiveness of the developed method is validated by the comparison with finite element method. Especially, the developed method can be used for engineering applications more easily, and it does not require to rebuild the calculation model as finite element method during the calculation and analysis of PLCP. The buckling performance of PLCP and its influencing factors are numerically analyzed through the developed method. The buckling performance of PLCP is reasonably increased by parametric studying different loads, laying angle, laying sequence, height of the matrix plate, and layer size. This paper is a valuable reference for the design and analysis of PLCP.
{"title":"The buckling performance of a piezoelectric laminated composite plate via static method","authors":"Chenyang Mao, Lei Liu, Bo Zhou, Xiuxing Zhu, Haijing Wang","doi":"10.1088/2631-6331/ad11f7","DOIUrl":"https://doi.org/10.1088/2631-6331/ad11f7","url":null,"abstract":"Piezoelectric materials are widely used as actuators, due to the advantages of quick response, high sensitivity and linear strain-electric field relationship. The previous work on the piezoelectric material plate structures are not enough, however such structures play a very important role in the practical design. In this paper, the buckling performance of piezoelectric laminated composite plate (PLCP) is analyzed based on static method to parametric study the buckling control. The stress components of the matrix layer are formulated based on electro-mechanical coupling theory and Kirchhoff’s classical laminated plate theory. Buckling differential governing equation of PLCP is obtained by using the equilibrium conditions. The solution of the governing equation is assumed as a sum of a series of trigonometric shape functions, and then its expression is obtained by using static method. The effectiveness of the developed method is validated by the comparison with finite element method. Especially, the developed method can be used for engineering applications more easily, and it does not require to rebuild the calculation model as finite element method during the calculation and analysis of PLCP. The buckling performance of PLCP and its influencing factors are numerically analyzed through the developed method. The buckling performance of PLCP is reasonably increased by parametric studying different loads, laying angle, laying sequence, height of the matrix plate, and layer size. This paper is a valuable reference for the design and analysis of PLCP.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"11 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Composite materials containing piezoelectric particles have attracted remarkable attention because of their distinctive electromechanical conversion characteristics. These supreme properties lead to their applications in various fields, such as vibration damping of structures. The damping parameter of dynamic systems is crucial, especially when they undergo resonance phenomena. Multi-phase polymer matrix composites consisting of piezoelectric particles are innovative material systems that have been recently introduced to convert the mechanical vibrations into electrical energy, and subsequently dissipate into heat through an internal electrical circuit. The present study aims to analytically investigate the viscoelastic characteristics of a shunted three-phase composite composed of a polymer matrix, electrically conductive nanoparticles and piezoelectric particles. The effective viscoelastic characteristics of a shunted composite are calculated using one- and two-step homogenization procedures and by considering the viscoelastic characteristics of constituent materials. The influence of several key parameters, namely, the non-dimensional frequency, the volume fraction of electrically conductive nanoparticles and piezoelectric particles, and the shape of the inclusions, on viscoelastic characteristics, such as phase angles, the storage modulus and loss modulus, are examined. The viscoelastic characteristics are considerably affected by these parameters, and the perceived behavior is justified by the governing equations. The assessment of results confirms that the damping characteristics can be improved by careful selection of a volume fraction of constituent materials and control of the excitation frequency of the smart composite, while avoiding additional costs and likely inconveniences in the fabrication process.
{"title":"Evaluation of damping characteristics of a hybrid piezo shunt nanocomposite by using two-steps homogenization approach","authors":"Sepehr Sedighi, Roohollah Sarfaraz, Pedram Safarpour","doi":"10.1088/2631-6331/ad03d8","DOIUrl":"https://doi.org/10.1088/2631-6331/ad03d8","url":null,"abstract":"Abstract Composite materials containing piezoelectric particles have attracted remarkable attention because of their distinctive electromechanical conversion characteristics. These supreme properties lead to their applications in various fields, such as vibration damping of structures. The damping parameter of dynamic systems is crucial, especially when they undergo resonance phenomena. Multi-phase polymer matrix composites consisting of piezoelectric particles are innovative material systems that have been recently introduced to convert the mechanical vibrations into electrical energy, and subsequently dissipate into heat through an internal electrical circuit. The present study aims to analytically investigate the viscoelastic characteristics of a shunted three-phase composite composed of a polymer matrix, electrically conductive nanoparticles and piezoelectric particles. The effective viscoelastic characteristics of a shunted composite are calculated using one- and two-step homogenization procedures and by considering the viscoelastic characteristics of constituent materials. The influence of several key parameters, namely, the non-dimensional frequency, the volume fraction of electrically conductive nanoparticles and piezoelectric particles, and the shape of the inclusions, on viscoelastic characteristics, such as phase angles, the storage modulus and loss modulus, are examined. The viscoelastic characteristics are considerably affected by these parameters, and the perceived behavior is justified by the governing equations. The assessment of results confirms that the damping characteristics can be improved by careful selection of a volume fraction of constituent materials and control of the excitation frequency of the smart composite, while avoiding additional costs and likely inconveniences in the fabrication process.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"73 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract In this study, magneto-responsive polyvinyl alcohol–alginate hydrogel beads are successfully fabricated using the electrospraying technique and applied as efficient adsorbents for the removal of cationic dyes, particularly malachite green (MG) and methylene blue (MeB), from water. The successful synthesis of the beads is confirmed using optical microscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. Additionally, batch adsorption studies are performed to evaluate the adsorption capacity of the hydrogel beads under varying concentrations, pH solution, and contact time. Results revealed that the beads exhibited excellent sorption capacities of 270.03 and 285.66 mg g −1 toward MG and MeB, respectively, indicating their potential as efficient adsorbents for cationic dye removal. The adsorption mechanism of the beads was further analyzed using kinetic and isotherm models, where the results revealed that the pseudo-second order kinetic model and Langmuir isotherm model exhibited the best fits with the experimental data. The incorporated magnetic nanoparticles enabled the easy separation and reuse of the hydrogel beads sample, as it maintained more than 75% of its efficiency even after five consecutive cycles. This study presents an innovative and sustainable solution for wastewater treatment, demonstrating the use of magneto-responsive hydrogel beads as effective and reusable adsorbents for cationic dye removal.
{"title":"Fabrication and characterization of magneto-responsive polyvinyl alcohol–alginate composite hydrogel beads for the removal of cationic dyes from aqueous solutions","authors":"PHU NANN AYE MYA MYA, Ganghoon Jeong, Eunsol Wi, Keun Seong Kim, Jae Pil Gim, Woo Yun Jeong, Mincheol Chang","doi":"10.1088/2631-6331/ad07e8","DOIUrl":"https://doi.org/10.1088/2631-6331/ad07e8","url":null,"abstract":"Abstract In this study, magneto-responsive polyvinyl alcohol–alginate hydrogel beads are successfully fabricated using the electrospraying technique and applied as efficient adsorbents for the removal of cationic dyes, particularly malachite green (MG) and methylene blue (MeB), from water. The successful synthesis of the beads is confirmed using optical microscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. Additionally, batch adsorption studies are performed to evaluate the adsorption capacity of the hydrogel beads under varying concentrations, pH solution, and contact time. Results revealed that the beads exhibited excellent sorption capacities of 270.03 and 285.66 mg g −1 toward MG and MeB, respectively, indicating their potential as efficient adsorbents for cationic dye removal. The adsorption mechanism of the beads was further analyzed using kinetic and isotherm models, where the results revealed that the pseudo-second order kinetic model and Langmuir isotherm model exhibited the best fits with the experimental data. The incorporated magnetic nanoparticles enabled the easy separation and reuse of the hydrogel beads sample, as it maintained more than 75% of its efficiency even after five consecutive cycles. This study presents an innovative and sustainable solution for wastewater treatment, demonstrating the use of magneto-responsive hydrogel beads as effective and reusable adsorbents for cationic dye removal.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135191270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-20DOI: 10.1088/2631-6331/ad0564
T Raghavendra, Niranjan CA, M Shilpa, Panneerselvam K, Akriti Singh
Abstract In the present study camphor soot filled palmyra fiber reinforced nylon 6 hybrid nano composites (CPFNnC) were prepared using a twin -screw extruder with different wt. % (0, 3, 6, 9). These composites were characterized to study the thermal, mechanical, and rheological properties. Thermo gravimetric Analysis (TGA) showed marginal increase in thermal stability with 6wt. % CPFNnC. Differential Scanning Calorimetry (DSC) curves showed a slight increment in the melting point in CPFNnC while degradation temperature decreased with fiber contents. Dynamic Mechanical Analysis (DMA) indicated with maximum storage modulus for 6wt. % CPFNnC at 803 MPa compared with fiber free nylon-6 (696 MPa at 25 °C). Tan δ for 3 wt. % CPFNnC showed better damping effect due to the existence of palmyra fibers. Creep results indicated that, CPFNnC contains 6 wt.% fibers has minimum depth impression of 0.124 mm compared to fiber free nylon with 0.146 mm. Scanning Electron Microscope (SEM) revealed uniform distribution of modified palmyra fibers in the matrix and brittle fracture was observed in the CPFNnC. Compared to fiber free nylon-6, the tensile strength, flexural strength and density of the CPFNnC increased with increase in fiber content, however the impact strength and a lower Melt Flow Index (MFI) properties were found declined.
{"title":"Effect of hybridization on camphor soot embedded Palmyra fiber reinforced nylon nano composites","authors":"T Raghavendra, Niranjan CA, M Shilpa, Panneerselvam K, Akriti Singh","doi":"10.1088/2631-6331/ad0564","DOIUrl":"https://doi.org/10.1088/2631-6331/ad0564","url":null,"abstract":"Abstract In the present study camphor soot filled palmyra fiber reinforced nylon 6 hybrid nano composites (CPFNnC) were prepared using a twin -screw extruder with different wt. % (0, 3, 6, 9). These composites were characterized to study the thermal, mechanical, and rheological properties. Thermo gravimetric Analysis (TGA) showed marginal increase in thermal stability with 6wt. % CPFNnC. Differential Scanning Calorimetry (DSC) curves showed a slight increment in the melting point in CPFNnC while degradation temperature decreased with fiber contents. Dynamic Mechanical Analysis (DMA) indicated with maximum storage modulus for 6wt. % CPFNnC at 803 MPa compared with fiber free nylon-6 (696 MPa at 25 °C). Tan δ for 3 wt. % CPFNnC showed better damping effect due to the existence of palmyra fibers. Creep results indicated that, CPFNnC contains 6 wt.% fibers has minimum depth impression of 0.124 mm compared to fiber free nylon with 0.146 mm. Scanning Electron Microscope (SEM) revealed uniform distribution of modified palmyra fibers in the matrix and brittle fracture was observed in the CPFNnC. Compared to fiber free nylon-6, the tensile strength, flexural strength and density of the CPFNnC increased with increase in fiber content, however the impact strength and a lower Melt Flow Index (MFI) properties were found declined.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135567802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Automotive hood, a closure system of the engine compartment, needs to be mounted in a suitable position to avoid irregular gaps and flush when it is initially assembled. Hood panel is mounted with an elastomer part called weatherstrip that is generally made of EPDM foam material for sealing and reducing vehicle vibration and whistling noise. Since the elastomer material exhibits non-linear mechanical properties and viscoelasticity, which result in unpredictable reaction force and compression set, finite element analysis (FEA) of the automotive hood panel displacement with weatherstrip model shows low precision and long computing time. To resolve this issue, in this study, a cost-effective methodology for FEA is introduced by applying compressive stress of weatherstrip into distributed surface load in the finite element model without weatherstrip modeling. In addition, 2D FEA of the weatherstrip was performed to investigate the effect of structural parameters on the reaction force. This work demonstrates a numerical approach for predicting automotive hood displacement, considering not only the material properties but also the structural design variables of the weatherstrip. Therefore, this approach can be applied to other closer parts where it requires highly efficient yet reliable predictive results for mounting position.
{"title":"Highly efficient and reliable numerical approach for predicting automotive hood displacement considering composite materials and structures of weatherstrip","authors":"Gyeongsik Ryu, Bumyong Yoon, Jinsoo Shin, Chul Hong Rhie, Jonghwan Suhr","doi":"10.1088/2631-6331/ad03b1","DOIUrl":"https://doi.org/10.1088/2631-6331/ad03b1","url":null,"abstract":"Abstract Automotive hood, a closure system of the engine compartment, needs to be mounted in a suitable position to avoid irregular gaps and flush when it is initially assembled. Hood panel is mounted with an elastomer part called weatherstrip that is generally made of EPDM foam material for sealing and reducing vehicle vibration and whistling noise. Since the elastomer material exhibits non-linear mechanical properties and viscoelasticity, which result in unpredictable reaction force and compression set, finite element analysis (FEA) of the automotive hood panel displacement with weatherstrip model shows low precision and long computing time. To resolve this issue, in this study, a cost-effective methodology for FEA is introduced by applying compressive stress of weatherstrip into distributed surface load in the finite element model without weatherstrip modeling. In addition, 2D FEA of the weatherstrip was performed to investigate the effect of structural parameters on the reaction force. This work demonstrates a numerical approach for predicting automotive hood displacement, considering not only the material properties but also the structural design variables of the weatherstrip. Therefore, this approach can be applied to other closer parts where it requires highly efficient yet reliable predictive results for mounting position.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136078652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Thermal interface materials (TIMs) have been widely employed to address the thermal issues arising in electronics. Given that heat generated at heat sources is dissipated into heat sinks through TIMs, the softer they are, the more efficient the heat transfer is. In this paper, a thermally conductive pressure-sensitive adhesive (PSA) film (gr-PSA film) in which graphite composite patterns were embedded was fabricated and its thermal conductivity and peeling behavior were investigated. Because of its low storage modulus (2.4 × 10 4 Pa), a mixture of soft polyurethane acrylate, butyl acrylate, and 2-ethylhexyl acrylate was used to fabricate a PSA. The in-plane and through-plane thermal conductivity of the gr-PSA film were measured as 1.56 (±0.37) Wm −1 K −1 and 0.25 (±0.03) Wm −1 K −1 , respectively. The peeling behavior of the gr-PSA tape was investigated by a 90° peel test and the results were compared with simulation results obtained by cohesive zone modeling implemented in the finite element method. Both results show that the peel force oscillated when the gr-PSA tape was peeled. Because the gr-PSA tape comprises alternating stiff and compliant segments, more force is needed peeling when bending the stiff segments.
{"title":"Fabrication and peeling behavior of thermally conductive pressure-sensitive adhesive films with embedded graphite composite patterns","authors":"SangAh Oh, Sangwoong Baek, Hyesun Yun, Min-Gi Kwak, Chan-Jae Lee, Youngmin Kim","doi":"10.1088/2631-6331/acfc12","DOIUrl":"https://doi.org/10.1088/2631-6331/acfc12","url":null,"abstract":"Abstract Thermal interface materials (TIMs) have been widely employed to address the thermal issues arising in electronics. Given that heat generated at heat sources is dissipated into heat sinks through TIMs, the softer they are, the more efficient the heat transfer is. In this paper, a thermally conductive pressure-sensitive adhesive (PSA) film (gr-PSA film) in which graphite composite patterns were embedded was fabricated and its thermal conductivity and peeling behavior were investigated. Because of its low storage modulus (2.4 × 10 4 Pa), a mixture of soft polyurethane acrylate, butyl acrylate, and 2-ethylhexyl acrylate was used to fabricate a PSA. The in-plane and through-plane thermal conductivity of the gr-PSA film were measured as 1.56 (±0.37) Wm −1 K −1 and 0.25 (±0.03) Wm −1 K −1 , respectively. The peeling behavior of the gr-PSA tape was investigated by a 90° peel test and the results were compared with simulation results obtained by cohesive zone modeling implemented in the finite element method. Both results show that the peel force oscillated when the gr-PSA tape was peeled. Because the gr-PSA tape comprises alternating stiff and compliant segments, more force is needed peeling when bending the stiff segments.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135548364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-21DOI: 10.1088/2631-6331/acfc13
Dongju Lee, So Jeong Heo, Seo Gyun Kim, Bon-Cheol Ku
Abstract With the growing importnace of high-performance carbon fibers (CFs), researches have been conducted in many applications such as aerospace, automobile and battery. Commercilalized carbon fibers have been manufactured with thermal treatment of organic precursor fibers including polyacrylonitrile (PAN), pitch and cellulose. Since conventional carbon fibers display either high tensile strength or high modulus properties due to structural limitations, it has been a chalenge to develop carbon fibers with both tensile strength and modulus. Therefore, various studies have been conducted to obtain high-performance carbon fiber. Among them, 1-dimensional carbon nanotubes (CNTs) have been used the most commonly because of high mechanical and conducting properties. In this review, the recent development of carbon nanotube fibers and carbon nanotube-based composite carbon fibers is introduced. The those fibers showed both high strength and high modulus with high conducting properties.
{"title":"A Review of High-Performance Carbon Nanotube-Based Carbon Fibers","authors":"Dongju Lee, So Jeong Heo, Seo Gyun Kim, Bon-Cheol Ku","doi":"10.1088/2631-6331/acfc13","DOIUrl":"https://doi.org/10.1088/2631-6331/acfc13","url":null,"abstract":"Abstract With the growing importnace of high-performance carbon fibers (CFs), researches have been conducted in many applications such as aerospace, automobile and battery. Commercilalized carbon fibers have been manufactured with thermal treatment of organic precursor fibers including polyacrylonitrile (PAN), pitch and cellulose. Since conventional carbon fibers display either high tensile strength or high modulus properties due to structural limitations, it has been a chalenge to develop carbon fibers with both tensile strength and modulus. Therefore, various studies have been conducted to obtain high-performance carbon fiber. Among them, 1-dimensional carbon nanotubes (CNTs) have been used the most commonly because of high mechanical and conducting properties. In this review, the recent development of carbon nanotube fibers and carbon nanotube-based composite carbon fibers is introduced. The those fibers showed both high strength and high modulus with high conducting properties.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136235817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-06DOI: 10.1088/2631-6331/acf753
Woo Nam Jeong, Moon-Kwang Um, Wie-Dae Kim, Hyung Doh Roh
During vacuum-assisted resin infusion (VARI), the thickness of the fabric manufactured into carbon fiber (CF)-reinforced plastic was monitored using electrical resistance, which was correlated with the mechanical and electrical status of the CF with respect to resin infiltration. Furthermore, the electrical network within CF varied in terms of its volume and number of electrical contacts. These phenomena were monitored by installing a Cu tape on the mold. Thus, an in-situ qualitative monitoring system for composite manufacturing was developed utilizing the electrical resistance variations in the fabric. The proposed thickness-monitoring system for VARI can potentially minimize the cost, time, and labor in composite industries.
{"title":"Electrical resistance-based monitoring of CFRP thickness during vacuum assisted resin infusion","authors":"Woo Nam Jeong, Moon-Kwang Um, Wie-Dae Kim, Hyung Doh Roh","doi":"10.1088/2631-6331/acf753","DOIUrl":"https://doi.org/10.1088/2631-6331/acf753","url":null,"abstract":"During vacuum-assisted resin infusion (VARI), the thickness of the fabric manufactured into carbon fiber (CF)-reinforced plastic was monitored using electrical resistance, which was correlated with the mechanical and electrical status of the CF with respect to resin infiltration. Furthermore, the electrical network within CF varied in terms of its volume and number of electrical contacts. These phenomena were monitored by installing a Cu tape on the mold. Thus, an in-situ qualitative monitoring system for composite manufacturing was developed utilizing the electrical resistance variations in the fabric. The proposed thickness-monitoring system for VARI can potentially minimize the cost, time, and labor in composite industries.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48298581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1088/2631-6331/acf849
Sangeeta Tiwari, Reena Sharma, Nahar Singh, Sandeep Kumar Tiwari, Sanjay R Dhakate
Abstract Nanofibrous mats of polyacrylonitrile loaded with zirconia (PAN/Zr) have been fabricated and reported for the first time for effective removal of Hg (II) from water. The formation, morphology and adsorption characteristics of the composite nanofibrous mats were determined using scanning electron microscopy, Fourier transform infrared spectroscopy, x-ray diffraction and x-ray photoelectron spectroscopy. The thermal behavior of the prepared nanofibrous mat was studied using thermogravimetric analysis (TGA) and differential scanning calorimetry. The adsorption behavior of the nanofibers was studied as a function of time, pH, dose and concentration of the Hg solution. The Langmuir isotherm of the developed material indicates that it is very effective at removing low concentrations of Hg (even <50 ppb) in water. Kinetic data were fitted to first- and second-order kinetics, and the material was successfully regenerated by an acid solution and reused three times while retaining 80% removal efficiency for Hg. As the PAN/Zr/composite nanofibers are chemically and thermally stable, they can be easily regenerated and reused for effective removal of Hg(II), as per WHO/Environmental Protection Agency requirements.
{"title":"Highly stable functionalized PAN/Zr Nanofibrous mats for removal of Ultra low Concentrations of Hg (II)","authors":"Sangeeta Tiwari, Reena Sharma, Nahar Singh, Sandeep Kumar Tiwari, Sanjay R Dhakate","doi":"10.1088/2631-6331/acf849","DOIUrl":"https://doi.org/10.1088/2631-6331/acf849","url":null,"abstract":"Abstract Nanofibrous mats of polyacrylonitrile loaded with zirconia (PAN/Zr) have been fabricated and reported for the first time for effective removal of Hg (II) from water. The formation, morphology and adsorption characteristics of the composite nanofibrous mats were determined using scanning electron microscopy, Fourier transform infrared spectroscopy, x-ray diffraction and x-ray photoelectron spectroscopy. The thermal behavior of the prepared nanofibrous mat was studied using thermogravimetric analysis (TGA) and differential scanning calorimetry. The adsorption behavior of the nanofibers was studied as a function of time, pH, dose and concentration of the Hg solution. The Langmuir isotherm of the developed material indicates that it is very effective at removing low concentrations of Hg (even <50 ppb) in water. Kinetic data were fitted to first- and second-order kinetics, and the material was successfully regenerated by an acid solution and reused three times while retaining 80% removal efficiency for Hg. As the PAN/Zr/composite nanofibers are chemically and thermally stable, they can be easily regenerated and reused for effective removal of Hg(II), as per WHO/Environmental Protection Agency requirements.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135248619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.1088/2631-6331/acf848
GOWTHAMAN S
Abstract The development of efficient biomedical bone tissue implants has invoked significant impact in the biomedical research fields and aids the aged populated peoples. In this examination, the mechanical features of implant material (Ti–5Mo–5Cu alloy) has been investigated using the molecular dynamics method under varying temperature and strain rate to understand its physical phenomenon and through this study, it is found that the strain rate has offered a complex beneficial impact over the material characteristics such as yield stress and yield strain, owing to its higher impact over the restraining behavior between various atoms and strain toughening effect related to the temperature effect. Furthermore, the shear strain and point defect analysis has confirmed that the structural alteration and the establishment of multiple dislocations lead to induce the deformation behavior of Ti–5Mo–5Cu biomaterial alloy. Additionally, the radial distribution analysis has stated that the introduction of higher ambient temperature leads to invoking multiple dislocations which are responsible for the deformation behavior and cause the major reduction in tensile properties.
{"title":"Study on the Influence of Temperature and Strain Rate on the Tensile Behavior of Ti-5Mo-5Cu alloy Biomaterial Alloy:A Molecular Dynamics Simulation","authors":"GOWTHAMAN S","doi":"10.1088/2631-6331/acf848","DOIUrl":"https://doi.org/10.1088/2631-6331/acf848","url":null,"abstract":"Abstract The development of efficient biomedical bone tissue implants has invoked significant impact in the biomedical research fields and aids the aged populated peoples. In this examination, the mechanical features of implant material (Ti–5Mo–5Cu alloy) has been investigated using the molecular dynamics method under varying temperature and strain rate to understand its physical phenomenon and through this study, it is found that the strain rate has offered a complex beneficial impact over the material characteristics such as yield stress and yield strain, owing to its higher impact over the restraining behavior between various atoms and strain toughening effect related to the temperature effect. Furthermore, the shear strain and point defect analysis has confirmed that the structural alteration and the establishment of multiple dislocations lead to induce the deformation behavior of Ti–5Mo–5Cu biomaterial alloy. Additionally, the radial distribution analysis has stated that the introduction of higher ambient temperature leads to invoking multiple dislocations which are responsible for the deformation behavior and cause the major reduction in tensile properties.","PeriodicalId":12652,"journal":{"name":"Functional Composites and Structures","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135248826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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