{"title":"Test of Significance","authors":"Anindya Ghosh, Bapi Saha, P. Mal","doi":"10.1201/9781003081234-7","DOIUrl":"https://doi.org/10.1201/9781003081234-7","url":null,"abstract":"","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"2015 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86916138","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}
{"title":"Analysis of Variance","authors":"Anindya Ghosh, Bapi Saha, P. Mal","doi":"10.1201/9781003081234-8","DOIUrl":"https://doi.org/10.1201/9781003081234-8","url":null,"abstract":"","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80189335","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 : 2021-11-03DOI: 10.1201/ebk1420052404-c4
Anindya Ghosh, Bapi Saha, P. Mal
{"title":"Continuous Probability Distributions","authors":"Anindya Ghosh, Bapi Saha, P. Mal","doi":"10.1201/ebk1420052404-c4","DOIUrl":"https://doi.org/10.1201/ebk1420052404-c4","url":null,"abstract":"","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85080059","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}
Mayu Fujimoto, K. Mukoyama, Xingsheng Li, Koushu Hanaki, T. Kurashiki
FRTP is highly recyclable and suitable for mass production. In addition, by using the spread yarns treated in a wide and thin state as the woven structure, it is expected that the generation of voids at the time of impregnation will be reduced and the mechanical properties will be improved, and the impregnation time will be shortened. In this study, the effect of ply thickness on a damage development behavior of woven CFRTP using spread yarns was investigated by FEM based on damage mechanics. Firstly, finite element models of the woven structure with different ply thickness changed from the conventional yarns to the spread yarns were created. Secondary, as the material properties of the model, that of the UD material were applied to the fiber bundle, and the material nonlinear model based on stress dependence of the thermoplastic resin was applied to the matrix. Finally, damage development analysis was carried out on those models. As a result, it was clarified that the damage development behavior in the fiber bundle and in the matrix differs depending on the ply thickness.
{"title":"Effect of Ply Thickness on Damage Development Behavior of Thermoplastic Woven Fabric Composites Using Spread Yarns","authors":"Mayu Fujimoto, K. Mukoyama, Xingsheng Li, Koushu Hanaki, T. Kurashiki","doi":"10.4188/jte.67.91","DOIUrl":"https://doi.org/10.4188/jte.67.91","url":null,"abstract":"FRTP is highly recyclable and suitable for mass production. In addition, by using the spread yarns treated in a wide and thin state as the woven structure, it is expected that the generation of voids at the time of impregnation will be reduced and the mechanical properties will be improved, and the impregnation time will be shortened. In this study, the effect of ply thickness on a damage development behavior of woven CFRTP using spread yarns was investigated by FEM based on damage mechanics. Firstly, finite element models of the woven structure with different ply thickness changed from the conventional yarns to the spread yarns were created. Secondary, as the material properties of the model, that of the UD material were applied to the fiber bundle, and the material nonlinear model based on stress dependence of the thermoplastic resin was applied to the matrix. Finally, damage development analysis was carried out on those models. As a result, it was clarified that the damage development behavior in the fiber bundle and in the matrix differs depending on the ply thickness.","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83292118","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}
In this paper, cam profile dynamic modeling and analysis of the cam slider modulator are presented. The nonlinear dynamic model is derived for the modulator equation with consideration of the flexible effect. The fourth order Runge-Kutta method is employed to for response solving. The lumped parameter and Monte Carlo simulation methods are also utilized. Modulator roller vibration with regard to the cam profile machining errors are analyzed. In order to analyze the vibrational response at different speeds, VB.net simulation is performed. The results demonstrate that the disturbed cam profile vibrates smoothly and randomly when the dobby speed is less than 400 r/min. Furthermore, it is observed that the operating dobby speed should not exceed 900 r/min. For disturbed cam profile system, when the speed of the dobby is less than 400 r/min, small follower vibration response is observed. When dobby speed is greater than 200 r/min, significant impact on the follower vibration response is observed.
{"title":"Analysis of the Influence of Machining Errors on the Dynamic Characteristics of the Dobby Modulator","authors":"Hongbin Yu, Qingyuan Guo, Honghuan Yin, Junqiang Peng","doi":"10.4188/jte.67.77","DOIUrl":"https://doi.org/10.4188/jte.67.77","url":null,"abstract":"In this paper, cam profile dynamic modeling and analysis of the cam slider modulator are presented. The nonlinear dynamic model is derived for the modulator equation with consideration of the flexible effect. The fourth order Runge-Kutta method is employed to for response solving. The lumped parameter and Monte Carlo simulation methods are also utilized. Modulator roller vibration with regard to the cam profile machining errors are analyzed. In order to analyze the vibrational response at different speeds, VB.net simulation is performed. The results demonstrate that the disturbed cam profile vibrates smoothly and randomly when the dobby speed is less than 400 r/min. Furthermore, it is observed that the operating dobby speed should not exceed 900 r/min. For disturbed cam profile system, when the speed of the dobby is less than 400 r/min, small follower vibration response is observed. When dobby speed is greater than 200 r/min, significant impact on the follower vibration response is observed.","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75687694","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}
Long molding times and the impossibility of remelting or reforming carbon fiber-reinforced plastics (CFRPs) that contain thermosetting resin after molding have led researchers to focus on carbon fiber-reinforced thermoplastics (CFRTPs) made with thermoplastic resin. Compared to CFRPs, CFRTPs are easier to recycle, but they generally exhibit strength properties that are inferior to those of CFRPs due to poor adhesion between the carbon fiber and the resin. To address this issue, we devised a new surface modification method (using a titania solution) to improve adhesion between fiber and the resin. Fragmentation and tensile tests were used to evaluate the effect of the surface modification method on CFRTP adhesion. The results indicate that surface modification can enhance adhesion in CFRTP, which may improve the material’s mechanical properties.
{"title":"Surface Modification of Carbon Fiber Using a Titania Solution and the Mechanical Properties of CFRTP Fabricated Using That Method","authors":"L. Bao, N. Okuno, Mitsuo Nishida, Y. Murakami","doi":"10.4188/jte.67.85","DOIUrl":"https://doi.org/10.4188/jte.67.85","url":null,"abstract":"Long molding times and the impossibility of remelting or reforming carbon fiber-reinforced plastics (CFRPs) that contain thermosetting resin after molding have led researchers to focus on carbon fiber-reinforced thermoplastics (CFRTPs) made with thermoplastic resin. Compared to CFRPs, CFRTPs are easier to recycle, but they generally exhibit strength properties that are inferior to those of CFRPs due to poor adhesion between the carbon fiber and the resin. To address this issue, we devised a new surface modification method (using a titania solution) to improve adhesion between fiber and the resin. Fragmentation and tensile tests were used to evaluate the effect of the surface modification method on CFRTP adhesion. The results indicate that surface modification can enhance adhesion in CFRTP, which may improve the material’s mechanical properties.","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89583959","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}
The present paper numerically analyzed the effect of nanoparticle volume fraction on thermal flows of Al 2 O 3 / Water nanofluids through a two-dimensional model heat exchanger channel. The trade-off relation between thermal conductivity and pressure drop in nanofluid flows was studied using numerical thermal flow simulation in which the dependence of both thermal conductivity and viscosity on the nanoparticle volume fraction and the distribution of nanoparticles in flows were considered. The Batchelor model and the Lu and Lin model were applied to models of viscosity and thermal conductivity of nanofluids, respectively. The results obtained are: (1) Nanofluids contribute to make an improvement of heat transfer without harmful effects to flow. (2) From the energy efficiency point of view, it was found that the use of nanofluids at low particle volume fractions was appropriate. This is because a remarkable increase in the temperature efficiency due to the addition of nanoparticles relative to an increase in the power required for flowing nanofluids in the channel is not expected at high particle volume fractions.
{"title":"Numerical Analysis of Nanofluid Thermal Flows through a Model Heat Exchanger:","authors":"T. Onishi, Y. Tsujinaka, Takehiro Yamamoto","doi":"10.4188/jte.67.65","DOIUrl":"https://doi.org/10.4188/jte.67.65","url":null,"abstract":"The present paper numerically analyzed the effect of nanoparticle volume fraction on thermal flows of Al 2 O 3 / Water nanofluids through a two-dimensional model heat exchanger channel. The trade-off relation between thermal conductivity and pressure drop in nanofluid flows was studied using numerical thermal flow simulation in which the dependence of both thermal conductivity and viscosity on the nanoparticle volume fraction and the distribution of nanoparticles in flows were considered. The Batchelor model and the Lu and Lin model were applied to models of viscosity and thermal conductivity of nanofluids, respectively. The results obtained are: (1) Nanofluids contribute to make an improvement of heat transfer without harmful effects to flow. (2) From the energy efficiency point of view, it was found that the use of nanofluids at low particle volume fractions was appropriate. This is because a remarkable increase in the temperature efficiency due to the addition of nanoparticles relative to an increase in the power required for flowing nanofluids in the channel is not expected at high particle volume fractions.","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"138 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75595740","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}
Compact spinning with a lattice apron is commonly used in commercial yarn spinning despite the high energy consumption due to high negative pressure generated during operation. In the current study, a numerical and experimental approach is used to study the impact of airflow behavior on yarn properties. Three-dimensional (3-D) printed guiding devices were used to control the airflow mechanism and negative pressure. Airflow analysis showed a significant decrease in the negative pressure and the rise in the total airflow velocity and streamlines distribution. This phenomenon eliminated the spinning triangle thus enhancing the spun yarn qualities and energy efficiency. The novel design is thus commended for further improvement and commercialization.
{"title":"A Novel Compact Spinning with Lattice Apron Achieved through Airflow Simulations","authors":"Malik Y. H. Saty, N. T. Akankwasa, Jun Wang","doi":"10.4188/jte.67.73","DOIUrl":"https://doi.org/10.4188/jte.67.73","url":null,"abstract":"Compact spinning with a lattice apron is commonly used in commercial yarn spinning despite the high energy consumption due to high negative pressure generated during operation. In the current study, a numerical and experimental approach is used to study the impact of airflow behavior on yarn properties. Three-dimensional (3-D) printed guiding devices were used to control the airflow mechanism and negative pressure. Airflow analysis showed a significant decrease in the negative pressure and the rise in the total airflow velocity and streamlines distribution. This phenomenon eliminated the spinning triangle thus enhancing the spun yarn qualities and energy efficiency. The novel design is thus commended for further improvement and commercialization.","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77200942","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}
Surging in the false-twisting machine degrades yarn quality. Surging is a yarn vibration phenomenon, and its cause has not been clarified. It is an important issue to clarify the causes of surging from the viewpoint of the textile industry. Investigating the causes of surging contributes to not only higher processing speed but also higher processing efficiency. This investigation also contributes to stabilizing the yarn quality at the false-twisting production site. In this study, a disc-friction type model machine was used to evaluate the yarn conditions of false twisting with and without surging. It was observed that surging tends to occur at low drawing ratios and high-speed processing. In the addon twisting area, the number of twists, drawing quantity, yarn tension, yarn temperature, and heating time decreased because of the occurrence of surging. These results show the actual condition of the yarns with surging and confirm the interrelationship between surging and processing conditions of false twisting.
{"title":"Relationship between Surging Phenomenon and Processing Conditions in False Twisting","authors":"Naoto Kaneda, Kouichirou Hayashida, T. Kinari","doi":"10.4188/jte.67.57","DOIUrl":"https://doi.org/10.4188/jte.67.57","url":null,"abstract":"Surging in the false-twisting machine degrades yarn quality. Surging is a yarn vibration phenomenon, and its cause has not been clarified. It is an important issue to clarify the causes of surging from the viewpoint of the textile industry. Investigating the causes of surging contributes to not only higher processing speed but also higher processing efficiency. This investigation also contributes to stabilizing the yarn quality at the false-twisting production site. In this study, a disc-friction type model machine was used to evaluate the yarn conditions of false twisting with and without surging. It was observed that surging tends to occur at low drawing ratios and high-speed processing. In the addon twisting area, the number of twists, drawing quantity, yarn tension, yarn temperature, and heating time decreased because of the occurrence of surging. These results show the actual condition of the yarns with surging and confirm the interrelationship between surging and processing conditions of false twisting.","PeriodicalId":35429,"journal":{"name":"Journal of Textile Engineering","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79665009","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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