Pub Date : 2024-01-19DOI: 10.1177/07316844241228933
Dongyuan Du, Yanpeng Hao, Yingying Zhang
Epoxy resin (EP) is used in electric power equipment due to its superior mechanical and insulating qualities. However, as power equipment advances towards high voltage and high frequency, the drawbacks of epoxy resin’s poor thermal conductivity become more apparent. This study studied the thermal and mechanical properties of an EP composite when the concentration of hydroxylated boron nitride (BN) was increased. The findings demonstrate that as BN content is increased, epoxy resin’s thermal conductivity also increases. When BN concentration reaches 40%, the heat conduction network is constructed. The mechanical characteristics of epoxy resin rapidly deteriorate and BN agglomeration occurs when the concentration exceeds this threshold. Better dispersion of the hydroxylated BN is made possible by the hydrogen bond formed between BN and epoxy resin, which regulates the mechanical properties of the EP.
环氧树脂（EP）因其优异的机械和绝缘性能而被广泛应用于电力设备中。然而，随着电力设备向高电压、高频率方向发展，环氧树脂导热性差的缺点日益明显。本研究对羟基氮化硼（BN）浓度增加时 EP 复合材料的热性能和机械性能进行了研究。研究结果表明，随着 BN 含量的增加，环氧树脂的导热性也会增加。当 BN 浓度达到 40% 时，热传导网络就会形成。当 BN 浓度超过这一临界值时，环氧树脂的机械特性会迅速恶化，并出现 BN 凝聚现象。BN 与环氧树脂之间形成的氢键使羟基 BN 得以更好地分散，从而调节了 EP 的机械特性。
{"title":"Molecular simulation study on the influence mechanism of thermal and mechanical properties of boron nitride filled epoxy resin","authors":"Dongyuan Du, Yanpeng Hao, Yingying Zhang","doi":"10.1177/07316844241228933","DOIUrl":"https://doi.org/10.1177/07316844241228933","url":null,"abstract":"Epoxy resin (EP) is used in electric power equipment due to its superior mechanical and insulating qualities. However, as power equipment advances towards high voltage and high frequency, the drawbacks of epoxy resin’s poor thermal conductivity become more apparent. This study studied the thermal and mechanical properties of an EP composite when the concentration of hydroxylated boron nitride (BN) was increased. The findings demonstrate that as BN content is increased, epoxy resin’s thermal conductivity also increases. When BN concentration reaches 40%, the heat conduction network is constructed. The mechanical characteristics of epoxy resin rapidly deteriorate and BN agglomeration occurs when the concentration exceeds this threshold. Better dispersion of the hydroxylated BN is made possible by the hydrogen bond formed between BN and epoxy resin, which regulates the mechanical properties of the EP.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139525878","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 : 2024-01-19DOI: 10.1177/07316844241228170
Wencai Dong, Chonggao Bao, Rongzhen Liu, Shijia Li
To improve the print quality and mechanical properties, the process parameters of the continuous carbon fiber-reinforced phenolic resin (CF/PF) composites were systematically investigated based on the in situ-curing 3D printing technology. The printing spacing and printing thickness affected the bonding between fiber bundles. Under the optimized parameters, the surface of the CF/PF composites was smooth and flat, without obvious gaps between the adjacent prepregs and printing layers. Especially, we optimized the resin impregnation temperature ( T i) and analyzed the influence mechanism on mechanical properties. With the increasing impregnation temperature, the resin content and the squeezing force applied to fiber bundles decrease, while the wettability between fiber and resin increases. The resin contents and the squeezing force play more important role on the mechanical properties of the CF/PF composites. With the combined influence of the above effects, the flexural strength of CF/PF composites reaches maximum value of 471.1 MPa under the impregnation temperature of 30°C, printing spacing of 0.80 mm, and printing thickness of 0.10 mm, with minimum defect volume, uniform distribution of fiber and resin, and appropriate fiber/resin interaction.
{"title":"Parameter design of continuous carbon fiber-reinforced phenolic resin composites via in situ-curing 3D printing technology","authors":"Wencai Dong, Chonggao Bao, Rongzhen Liu, Shijia Li","doi":"10.1177/07316844241228170","DOIUrl":"https://doi.org/10.1177/07316844241228170","url":null,"abstract":"To improve the print quality and mechanical properties, the process parameters of the continuous carbon fiber-reinforced phenolic resin (CF/PF) composites were systematically investigated based on the in situ-curing 3D printing technology. The printing spacing and printing thickness affected the bonding between fiber bundles. Under the optimized parameters, the surface of the CF/PF composites was smooth and flat, without obvious gaps between the adjacent prepregs and printing layers. Especially, we optimized the resin impregnation temperature ( T i) and analyzed the influence mechanism on mechanical properties. With the increasing impregnation temperature, the resin content and the squeezing force applied to fiber bundles decrease, while the wettability between fiber and resin increases. The resin contents and the squeezing force play more important role on the mechanical properties of the CF/PF composites. With the combined influence of the above effects, the flexural strength of CF/PF composites reaches maximum value of 471.1 MPa under the impregnation temperature of 30°C, printing spacing of 0.80 mm, and printing thickness of 0.10 mm, with minimum defect volume, uniform distribution of fiber and resin, and appropriate fiber/resin interaction.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"4 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139526069","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 : 2024-01-17DOI: 10.1177/07316844241226548
Jianguo Liang, Yuqin Xue, Yinhui Li, Chunjiang Zhao, Jianglin Liu, Xiaodong Zhao, Lei Zu
To realize efficient and stable continuous transition between different winding process layers of composite pressure vessels. This article uses the non-geodesic winding equation to propose a transition layer design method for composite pressure vessel shells with circular cross-section core molds and ellipsoidal heads. Firstly, the fourth-order Runge–Kutta method is used to solve the non-geodesic stabilized winding pattern and then analyze different regions’ transition ability. Established a calculation model to determine the corresponding transition winding trajectory according to the known core mold shape and fiber position and carried out computer image simulation of different modes of transition layer patterns, and finally carried out experimental verification of 35 MPa composite pressure vessel based on the simulation. The results show that different regions of the core mold have different abilities to change different starting winding angles, and the design of the transition process layer based on this law can save the area needed for transition. This method realizes the smooth transition of different process layers; the fiber of the transition layer does not slip in the actual winding process, and the actual pattern of the winding is consistent with the simulation results, which saves 20.8% of the winding time, and effectively improves the automation of the composite pressure vessel winding process.
{"title":"Design of continuous transition line pattern between layers of composite pressure vessel","authors":"Jianguo Liang, Yuqin Xue, Yinhui Li, Chunjiang Zhao, Jianglin Liu, Xiaodong Zhao, Lei Zu","doi":"10.1177/07316844241226548","DOIUrl":"https://doi.org/10.1177/07316844241226548","url":null,"abstract":"To realize efficient and stable continuous transition between different winding process layers of composite pressure vessels. This article uses the non-geodesic winding equation to propose a transition layer design method for composite pressure vessel shells with circular cross-section core molds and ellipsoidal heads. Firstly, the fourth-order Runge–Kutta method is used to solve the non-geodesic stabilized winding pattern and then analyze different regions’ transition ability. Established a calculation model to determine the corresponding transition winding trajectory according to the known core mold shape and fiber position and carried out computer image simulation of different modes of transition layer patterns, and finally carried out experimental verification of 35 MPa composite pressure vessel based on the simulation. The results show that different regions of the core mold have different abilities to change different starting winding angles, and the design of the transition process layer based on this law can save the area needed for transition. This method realizes the smooth transition of different process layers; the fiber of the transition layer does not slip in the actual winding process, and the actual pattern of the winding is consistent with the simulation results, which saves 20.8% of the winding time, and effectively improves the automation of the composite pressure vessel winding process.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"21 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139527319","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 : 2024-01-13DOI: 10.1177/07316844221143745
Asal Lolaki, M. Zarrebini, Davood Mostofinejad, S. M. Abtahi, M. Shanbeh
Helical Auxetic Yarn (HAY) possesses negative Poisson’s ratio. These yarns can be successfully used as reinforcing elements in composite materials. This paper proposes a novel tri-component helical auxetic structure capable of enhancing the initial modulus of HAY. The novel structure comprises a high modulus thin secondary core II positioned along the first low modulus thick primary core I. An additional stiff strand wraps the cores I and II. Using statistical techniques, evaluation of the secant modulus and not Young’s modulus was carried out and validated. The resultant structure was found to possess a relatively high elastic modulus in the range of 11–15 GPa. The structure exhibited an auxetic phenomenon of −62. It was revealed that such high stiffness auxetic yarn could successfully be utilized as reinforcing elements in high stiffness cost-effective auxetic composite structures.
螺旋辅助纱线（HAY）具有负泊松比。这些纱线可成功用作复合材料中的增强元件。本文提出了一种新型三组份螺旋助剂结构，能够提高 HAY 的初始模量。这种新型结构包括沿着第一个低模量粗主芯 I 定位的高模量细次芯 II。利用统计技术，对正割模量和非杨氏模量进行了评估和验证。结果发现，该结构具有相对较高的弹性模量，范围在 11-15 GPa 之间。该结构表现出 -62 的辅助现象。结果表明，这种高刚度辅助纱线可以成功地用作高刚度成本效益辅助复合材料结构的增强元件。
{"title":"Mechanical properties of a novel tri-component high stiff auxetic reinforced composite structure","authors":"Asal Lolaki, M. Zarrebini, Davood Mostofinejad, S. M. Abtahi, M. Shanbeh","doi":"10.1177/07316844221143745","DOIUrl":"https://doi.org/10.1177/07316844221143745","url":null,"abstract":"Helical Auxetic Yarn (HAY) possesses negative Poisson’s ratio. These yarns can be successfully used as reinforcing elements in composite materials. This paper proposes a novel tri-component helical auxetic structure capable of enhancing the initial modulus of HAY. The novel structure comprises a high modulus thin secondary core II positioned along the first low modulus thick primary core I. An additional stiff strand wraps the cores I and II. Using statistical techniques, evaluation of the secant modulus and not Young’s modulus was carried out and validated. The resultant structure was found to possess a relatively high elastic modulus in the range of 11–15 GPa. The structure exhibited an auxetic phenomenon of −62. It was revealed that such high stiffness auxetic yarn could successfully be utilized as reinforcing elements in high stiffness cost-effective auxetic composite structures.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"23 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139531244","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 : 2024-01-13DOI: 10.1177/07316844241226834
Autumn R. Bernard, M. M. Yalçın, Mostafa S. A. ElSayed
Cellular solids have superior energy absorption capabilities as compared to monolithic materials. Within this category of materials, lattice materials are of particular interest since their periodicity offers repeatable – and thus predictable – behavior. In combination with the advancements in additive manufacturing technologies, these lattice materials can be highly customized for a desired response. In this paper, the crashworthiness of unique multi-layer, multi-topology (MLMT) lattices is investigated. First, the nylon-carbon fiber composite material properties within a developed numerical model were tuned based on strut orientation. Then, the response of single-layer and three-layer cubic and octet lattices was investigated, where all lattices were designed with a relative density of 30%. Following the characterization of single-topology lattices, the response of MLMT lattices were investigated. Stress-strain, efficiency-strain, and multiple crashworthiness parameter data was collected for all lattices to facilitate in the comparison of those lattices. It was found that, experimentally, the unique MLMT lattices did not absorb more energy than their constituent layers combined, though modifications to the interface between layers could increase the energy absorption capability; the prediction of energy absorption of the MLMT lattices based on constituent layers was similar to actual numerical results. As all lattices were designed at the same relative density, the mass-specific energy absorption of the cubic-octet-cubic MLMT lattice (1.56 x103 J/kg) outperforms the single-topology octet lattice by 19% to 36% (1.15–1.31 x103 J/kg). While the octet-cubic-octet MLMT lattice (0.71 x103 J/kg) is outperformed by the single-topology cubic lattices (1.69–3.76 x103 J/kg), they see an increase of 59% to 77% in plateau stress (5.1–9.2 MPa) as compared to the MLMT lattice (2.1 MPa).
{"title":"Crashworthiness investigations for 3D printed multi-layer multi-topology carbon fiber nylon lattice materials","authors":"Autumn R. Bernard, M. M. Yalçın, Mostafa S. A. ElSayed","doi":"10.1177/07316844241226834","DOIUrl":"https://doi.org/10.1177/07316844241226834","url":null,"abstract":"Cellular solids have superior energy absorption capabilities as compared to monolithic materials. Within this category of materials, lattice materials are of particular interest since their periodicity offers repeatable – and thus predictable – behavior. In combination with the advancements in additive manufacturing technologies, these lattice materials can be highly customized for a desired response. In this paper, the crashworthiness of unique multi-layer, multi-topology (MLMT) lattices is investigated. First, the nylon-carbon fiber composite material properties within a developed numerical model were tuned based on strut orientation. Then, the response of single-layer and three-layer cubic and octet lattices was investigated, where all lattices were designed with a relative density of 30%. Following the characterization of single-topology lattices, the response of MLMT lattices were investigated. Stress-strain, efficiency-strain, and multiple crashworthiness parameter data was collected for all lattices to facilitate in the comparison of those lattices. It was found that, experimentally, the unique MLMT lattices did not absorb more energy than their constituent layers combined, though modifications to the interface between layers could increase the energy absorption capability; the prediction of energy absorption of the MLMT lattices based on constituent layers was similar to actual numerical results. As all lattices were designed at the same relative density, the mass-specific energy absorption of the cubic-octet-cubic MLMT lattice (1.56 x103 J/kg) outperforms the single-topology octet lattice by 19% to 36% (1.15–1.31 x103 J/kg). While the octet-cubic-octet MLMT lattice (0.71 x103 J/kg) is outperformed by the single-topology cubic lattices (1.69–3.76 x103 J/kg), they see an increase of 59% to 77% in plateau stress (5.1–9.2 MPa) as compared to the MLMT lattice (2.1 MPa).","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139531426","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 : 2024-01-07DOI: 10.1177/07316844231225337
Yawen Yang, Xi Chen, Bei Liu, Yufeng Li, Haibin Yin
The reinforcement binding in the construction field has recently been moving from manual to automation. However, the current binding device powered by electrical motors is complex and unwieldy. This paper proposes a method for reinforcement binding under thermal driving utilizing the thermally induced shape memory characteristic of shape memory polymer composite support with integrated structure and function. The method involves manufacturing support memory binding shape, programming to temporary shape, and reheating to complete binding. Supports reinforced with ceramic powder and glass fiber are manufactured using molds. The tensile test shows a positive correlation between the maximum tensile force of support and the weight fraction of reinforcing materials. The 6.93% weight fraction glass fiber reinforced support achieves the highest tensile force among all supports, at least 39% higher than the maximum tensile force of existing wire binding. All supports require 9 s to complete binding at 60°C, while it only takes 6 s to increase the heating temperature to 80°C. This article presents the potential of thermally driven shape memory polymer composite support for reinforcement binding for the first time.
{"title":"Shape memory polymer composite supports for reinforcement binding: Design, manufacturing, and validation","authors":"Yawen Yang, Xi Chen, Bei Liu, Yufeng Li, Haibin Yin","doi":"10.1177/07316844231225337","DOIUrl":"https://doi.org/10.1177/07316844231225337","url":null,"abstract":"The reinforcement binding in the construction field has recently been moving from manual to automation. However, the current binding device powered by electrical motors is complex and unwieldy. This paper proposes a method for reinforcement binding under thermal driving utilizing the thermally induced shape memory characteristic of shape memory polymer composite support with integrated structure and function. The method involves manufacturing support memory binding shape, programming to temporary shape, and reheating to complete binding. Supports reinforced with ceramic powder and glass fiber are manufactured using molds. The tensile test shows a positive correlation between the maximum tensile force of support and the weight fraction of reinforcing materials. The 6.93% weight fraction glass fiber reinforced support achieves the highest tensile force among all supports, at least 39% higher than the maximum tensile force of existing wire binding. All supports require 9 s to complete binding at 60°C, while it only takes 6 s to increase the heating temperature to 80°C. This article presents the potential of thermally driven shape memory polymer composite support for reinforcement binding for the first time.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"34 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139448164","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 : 2024-01-04DOI: 10.1177/07316844231223368
Milad Aghalari, Farshad Heidari, K. Shelesh‐Nezhad, T. Chakherlou
Acrylonitrile butadiene styrene (ABS) and polybutylene terephthalate (PBT) polymers are widely exploited polymers in the plastics industry. In this research, PBT polymer is added into ABS polymer as a second phase due to its good fluidity and some superior mechanical characteristics. Carbon nanotubes (CNTs) are added as a reinforcement into the ABS/PBT polymer blend (80/20). Standard samples of mechanical tests including tensile, flexural, and impact were made by injection molding and standard samples of fracture tests were made by hot press method. The essential work of fracture (EWF) method was used to check fracture toughness. The presence of PBT into ABS improved its tensile and flexural strength while it diminished the impact strength and fracture toughness of ABS. The addition of carbon nanotubes into ABS/PBT blends increased its tensile and flexural strength, impact resistance as well as fracture toughness. The results of microscopic tests demonstrate a relatively uniform distribution of carbon nanotubes in the polymer blend. In addition, the morphological observations illustrate a rather proper adhesion between carbon nanotubes and the polymeric matrix. As importantly, investigations on the fractured sections of fracture specimens revealed that the nanocomposites containing CNTs have a tendency toward a ductile failure in comparison with ABS/PBT polymer blend.
{"title":"An investigation on the toughening behavior and morphology of acrylonitrile butadiene styrene/polybutylene terephthalate blends reinforced by carbon nanotubes","authors":"Milad Aghalari, Farshad Heidari, K. Shelesh‐Nezhad, T. Chakherlou","doi":"10.1177/07316844231223368","DOIUrl":"https://doi.org/10.1177/07316844231223368","url":null,"abstract":"Acrylonitrile butadiene styrene (ABS) and polybutylene terephthalate (PBT) polymers are widely exploited polymers in the plastics industry. In this research, PBT polymer is added into ABS polymer as a second phase due to its good fluidity and some superior mechanical characteristics. Carbon nanotubes (CNTs) are added as a reinforcement into the ABS/PBT polymer blend (80/20). Standard samples of mechanical tests including tensile, flexural, and impact were made by injection molding and standard samples of fracture tests were made by hot press method. The essential work of fracture (EWF) method was used to check fracture toughness. The presence of PBT into ABS improved its tensile and flexural strength while it diminished the impact strength and fracture toughness of ABS. The addition of carbon nanotubes into ABS/PBT blends increased its tensile and flexural strength, impact resistance as well as fracture toughness. The results of microscopic tests demonstrate a relatively uniform distribution of carbon nanotubes in the polymer blend. In addition, the morphological observations illustrate a rather proper adhesion between carbon nanotubes and the polymeric matrix. As importantly, investigations on the fractured sections of fracture specimens revealed that the nanocomposites containing CNTs have a tendency toward a ductile failure in comparison with ABS/PBT polymer blend.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"20 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139386426","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 : 2024-01-03DOI: 10.1177/07316844231225593
M. Baraheni, Behzad Hashemi Soudmand, Saeid Amini, Masoud Bayat, Ali Ebrahimi
In this study, a comprehensive investigation was undertaken to analyze the impact of various factors on thrust force and burr damage in carbon fiber reinforced polymer laminates during drilling operations. The factors examined included the incorporation of nano-graphene, the application of ultrasonic vibration, the type of cutting tool, and the feed rate. Statistical and machine learning techniques were employed to analyze the data, and image processing was utilized to illustrate the extent of burr damage surrounding the drilled holes. The developed model exhibited satisfactory prediction accuracy with minimal error rates. Statistical analysis revealed that the feed rate exerted the greatest influence on thrust force and facilitated the burr generation. Likewise, the addition of nano-graphene resulted in an increased thrust force due to improved rupture limits, consequently leading to cleaner holes with minimal burr damage. Furthermore, the implementation of ultrasonic vibration and the use of high-cobalt cutting tools were found to enhance drilling performance by reducing thrust force and minimizing the burr formation. The best hole quality was achieved at the lowest feed rate, in combination with a cutting tool containing 8% cobalt and the utilization of ultrasonic vibration.
{"title":"Burr constitution analysis in ultrasonic-assisted drilling of CFRP/nano-graphene via experimental and data-driven methodologies","authors":"M. Baraheni, Behzad Hashemi Soudmand, Saeid Amini, Masoud Bayat, Ali Ebrahimi","doi":"10.1177/07316844231225593","DOIUrl":"https://doi.org/10.1177/07316844231225593","url":null,"abstract":"In this study, a comprehensive investigation was undertaken to analyze the impact of various factors on thrust force and burr damage in carbon fiber reinforced polymer laminates during drilling operations. The factors examined included the incorporation of nano-graphene, the application of ultrasonic vibration, the type of cutting tool, and the feed rate. Statistical and machine learning techniques were employed to analyze the data, and image processing was utilized to illustrate the extent of burr damage surrounding the drilled holes. The developed model exhibited satisfactory prediction accuracy with minimal error rates. Statistical analysis revealed that the feed rate exerted the greatest influence on thrust force and facilitated the burr generation. Likewise, the addition of nano-graphene resulted in an increased thrust force due to improved rupture limits, consequently leading to cleaner holes with minimal burr damage. Furthermore, the implementation of ultrasonic vibration and the use of high-cobalt cutting tools were found to enhance drilling performance by reducing thrust force and minimizing the burr formation. The best hole quality was achieved at the lowest feed rate, in combination with a cutting tool containing 8% cobalt and the utilization of ultrasonic vibration.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"23 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139451575","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 : 2024-01-03DOI: 10.1177/07316844231225079
K. Foroutan, Liming Dai
This study employs a semi-analytical approach to investigate the nonlinear torsional vibration and dynamic torsional post-buckling (DTPB) responses of spiral stiffened functionally graded (FG) porous (SSFGP) cylindrical shells. These shells are resting on a generalized nonlinear viscoelastic foundation (GNVEF). This foundation consists of a dual-parameter Winkler-Pasternak foundation augmented by a Kelvin-Voigt viscoelastic model. The model includes nonlinear cubic stiffness and takes damping effects into consideration. Within the scope of this research, two variations of SSFGP cylindrical shells are examined: those characterized by non-uniform and uniform porosity distributions. Employing the Donnell shell theory, von-Kármán nonlinear geometric assumptions, and Galerkin’s method, a discretized nonlinear governing equation is derived to analyze the behaviors of the shells. Consequently, explicit formulations for dynamic torsional load are meticulously obtained. The findings of the present study are validated by comparing them with the outcomes documented in existing literature, as well as through alignment with the P-T method. This research delves into the system’s nonlinear behaviors, with scrutinization of the effects of diverse factors such as material and geometrical parameters. The researchers and engineers in this field may use the findings of this research as benchmarks for their design and research of SSFGP cylindrical shells.
{"title":"Nonlinear torsional vibration and dynamic post-buckling responses of spiral stiffened functionally graded porous cylindrical shells","authors":"K. Foroutan, Liming Dai","doi":"10.1177/07316844231225079","DOIUrl":"https://doi.org/10.1177/07316844231225079","url":null,"abstract":"This study employs a semi-analytical approach to investigate the nonlinear torsional vibration and dynamic torsional post-buckling (DTPB) responses of spiral stiffened functionally graded (FG) porous (SSFGP) cylindrical shells. These shells are resting on a generalized nonlinear viscoelastic foundation (GNVEF). This foundation consists of a dual-parameter Winkler-Pasternak foundation augmented by a Kelvin-Voigt viscoelastic model. The model includes nonlinear cubic stiffness and takes damping effects into consideration. Within the scope of this research, two variations of SSFGP cylindrical shells are examined: those characterized by non-uniform and uniform porosity distributions. Employing the Donnell shell theory, von-Kármán nonlinear geometric assumptions, and Galerkin’s method, a discretized nonlinear governing equation is derived to analyze the behaviors of the shells. Consequently, explicit formulations for dynamic torsional load are meticulously obtained. The findings of the present study are validated by comparing them with the outcomes documented in existing literature, as well as through alignment with the P-T method. This research delves into the system’s nonlinear behaviors, with scrutinization of the effects of diverse factors such as material and geometrical parameters. The researchers and engineers in this field may use the findings of this research as benchmarks for their design and research of SSFGP cylindrical shells.","PeriodicalId":508263,"journal":{"name":"Journal of Reinforced Plastics and Composites","volume":"104 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139387988","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 : 2024-01-02DOI: 10.1177/07316844231225686
Vishal Mishra, S. Negi, Simanchal Kar
Three-dimensional (3D) printing of waste plastic such as acrylonitrile butadiene styrene (ABS) is challenging because multiple heating cycles and irregular cooling cause accumulation of stress in 3D-printed structures, which significantly affects mesostructured and fiber-to-fiber bond strength. Hence, this study demonstrates the ability to print high-quality parts via 3D printing using ABS waste. The different weight proportions (100, 90/10, 80/20, 70/30, 60/40, 50/50) of recycled ABS (RABS)/virgin ABS (VABS) are selected for experimentation. It is found that increasing VABS content in RABS significantly improved the physical properties of samples. Due to VABS blending in RABS, the average enhancement in flexural strength (Sf), flex modulus (Ef), and work of fracture (WOF) are 11.49%, 5.45%, and 17.31%, respectively, when compared with 100% RABS samples. Similarly, the average increase in Young’s modulus (E), tensile strength at yield (Ty), and ultimate tensile strength (UTS) are 7.71%, 5.19%, and 3.51%, respectively. The samples printed with 50% RABS/50% VABS blends show superior mechanical properties than others, also the properties of 90% RABS/10% VABS and 80% RABS/20% VABS are very close to 100% VABS samples. Hence, this study provides unique opportunities for the sustainable use of waste ABS using 3D printing technology.
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