WIT Transactions on State-of-the-art in Science and Engineering最新文献_第4页

Interfacial And Interlaminar Shear Strength Of Carbon Fiber Reinforced Polycarbonates Made With Unidirectional Sheets 单向片材碳纤维增强聚碳酸酯的界面和层间剪切强度

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/014

K. Tanaka, M. Suzue, S. Isshiki, M. Shinohara, T. Katayama

{"title":"Interfacial And Interlaminar Shear Strength Of Carbon Fiber Reinforced Polycarbonates Made With Unidirectional Sheets","authors":"K. Tanaka, M. Suzue, S. Isshiki, M. Shinohara, T. Katayama","doi":"10.2495/978-1-78466-167-0/014","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/014","url":null,"abstract":"Carbon fiber reinforced plastics (CFRPs) have been attracting attention in the automotive industry for their light-weight related properties. Thermoset plastics are mainly used as matrices in CFRPs in the aerospace industry. A thermosetting resin takes a long time to mold and this results in high costs. On the other hand, carbon fiber reinforced thermoplastics (CFRTPs) are recyclable, good in relation to productivity and excellent with regard to impact strength. Thus, they are expected to be widely applied within the industry. Polycarbonates (PCs) have excellent impact resistance which does not change even at low temperatures. Therefore, a PC can be expected to be applied as matrix in a CFRTP. A PC with higher-molecular-weight improves CFRTP’s impact resistance, but at the same time, increases its viscosity and deteriorates the impregnation of continuous fibers. Therefore, improvements in moldability of CF/PC are required. To improve the quality of the molded CF/PC, CF/PC thermoplastic prepregs, in which carbon fabrics or unidirectional carbon sheets are pre-impregnated with PC, were developed. In this study, carbon fiber reinforced polycarbonate (CF/PC) laminated composites were molded with unidirectional sheets of thermoplastic prepregs; the moldability and mechanical properties of CF/PC laminated composites were evaluated.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129653665","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}

引用次数: 10

High-speed Compression Molding Of Continuous Carbon Fiber-reinforced Polypropylene 连续碳纤维增强聚丙烯的高速压缩成型

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/010

S. Enoki, K. Kojima, S. Mizuno, K. Katayama, K. Tanaka

引用次数: 0

Effect Of Plasma Treatment On Lyocell Fabric/polylactic Acid 血浆处理对莱赛尔纤维/聚乳酸的影响

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/003

B. Kim, M. M. Kim, J. Ha, M. Um, B. Chun

{"title":"Effect Of Plasma Treatment On Lyocell Fabric/polylactic Acid","authors":"B. Kim, M. M. Kim, J. Ha, M. Um, B. Chun","doi":"10.2495/978-1-78466-167-0/003","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/003","url":null,"abstract":"Atmospheric glow discharge (AGD) was developed with industrial plasma sources using high voltage radio frequency (RF) excitation at kHz frequency ranges. It is possible to produce a steady-state uniform glow discharge at atmospheric pressure with various gases, thus eliminating the requirement of a vacuum system to expose the materials to plasma. The RF frequency should be set in the limited range to produce AGD: if it is too low, the discharge will not initiate and if it is too high, the plasma will either form a filamentary discharge between the electrode plates or it will be transformed to arc discharge. The advantage of AGD is to modify or coat the materials with good uniformity and making use of the AGD surface modification process, a strong interfacial adhesion can be formed between the constituents and the matrix material. Hence, AGD polymerization may be used to modify the surface properties of Lyocell fabric (acetate taffeta) and polylactic acid (PLA) matrix. In the AGD process, helium is used as a carrier gas and a monomer (acrylic acid) is used to modify the fibre surface properties by plasma polymerization. The reactor is operated at room temperature while the surface is modified at atmospheric pressure. Peel and tensile strength tests and characterizations by SEM were carried out for Lyocell fabric/PLA. Compared to raw fabric, plasma and silane treatments have improved the tensile strength by a maximum of 30.4 and 27.4%, respectively.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133739536","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}

引用次数: 0

Heating properties of carbon fibers subjected to direct resistance heating 直接电阻加热下碳纤维的加热性能

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/004

S. Enoki, K. Iwamoto, R. Harada, Kazuto Tanaka, T. Katayama

{"title":"Heating properties of carbon fibers subjected to direct resistance heating","authors":"S. Enoki, K. Iwamoto, R. Harada, Kazuto Tanaka, T. Katayama","doi":"10.2495/978-1-78466-167-0/004","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/004","url":null,"abstract":"To mold carbon fiber reinforced thermoplastics (CFRTP), it is necessary to impregnate carbon fiber with thermoplastic resin by heating the materials. Electromagnetic induction heating and direct resistance heating are available heating methods. The electromagnetic induction heating has a high production cost because of the complex equipment used. In contrast, the direct resistance heating is performed with a simple piece of equipment and low power consumption. It is thus better to use direct resistance heating for low-cost CFRTP molding. A process of CFRTP molding is here proposed using direct resistance heating of carbon fibers in non-crimp fabric (NCF). The resistance heating characteristics of NCF and the influence of resistance heating upon mechanical properties of carbon fibers are discussed. The temperature distribution in 0° and 90° layers were found sufficient and it took 70 s to reach 250°C in the temperature history when heat is applied to the NCF [0°/90°] using direct resistance heating. From the results of tensile tests of a single carbon fiber, the tensile strength did not decrease by resistance heating at 300°C for 300 s.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133290664","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}

引用次数: 0

The Effect Of Crystallinity On The Mechanical Properties Of Plain Woven Carbon Fiber Reinforced Polypropylene 结晶度对平纺碳纤维增强聚丙烯力学性能的影响

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/015

H. Katogi, K. Takemura

{"title":"The Effect Of Crystallinity On The Mechanical Properties Of Plain Woven Carbon Fiber Reinforced Polypropylene","authors":"H. Katogi, K. Takemura","doi":"10.2495/978-1-78466-167-0/015","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/015","url":null,"abstract":"In this study, the effect of crystallinity on the mechanical properties of carbon fiber reinforced thermoplastics (CFRTP) was investigated. Plain woven carbon fiber was used as reinforcement. Polypropylene (PP) and maleic anhydride modified polypropylene (MAPP) were used as matrix materials. The crystallinity of PP was controlled by heat treatment after hot press molding of CFRTP. The range of crystallinity of PP and MAPP were from 26% to 40%. Flexural and izod impact tests were conducted on CFRTP based on Japanese Industrial Standard (JIS) K 7074 and K 7110, respectively. Also, double-notched tests were conducted on CFRTP specimens. The crystal morphologies of single carbon fiber added thermoplastics were observed using a polarization microscope. As a result, the flexural strength and izod impact values of CFRTP using PP increased with an increase of crystallinity. The flexural strength and izod impact values of CFRTP using MAPP barely changed with an increase of crystallinity. However, the interfacial shear strength of CFRTP using MAPP increased with an increase of crystallinity. Crystallizations of PP and MAPP occurred around the carbon fiber after heat treatment. As a result, interfacial adhesion between fiber and resin increased with an increase of crystallinity.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121182661","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}

引用次数: 1

Effect of peroxide cross-linking on viscoelastic behaviour and thermal properties of zeolite filled ethylene vinyl acetate composite 过氧化物交联对沸石填充乙烯-醋酸乙烯复合材料粘弹性和热性能的影响

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/018

N. Zaharri, N. Othman

{"title":"Effect of peroxide cross-linking on viscoelastic behaviour and thermal properties of zeolite filled ethylene vinyl acetate composite","authors":"N. Zaharri, N. Othman","doi":"10.2495/978-1-78466-167-0/018","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/018","url":null,"abstract":"In this research, both crosslinked and uncrosslinked zeolite/ethylene vinyl acetate (EVA) composites were prepared by a melt-mixing process followed by compression molding using a hot press machine according to standard test specimen. For the crosslinking process, dicumyl peroxide (DCP) was used as a crosslink agent in the composites. Dynamic mechanical analysis (DMA) was performed in order to study the viscoelastic properties of the composites and the results indicated that the transition temperatures of crosslinked composites were greater than those of uncrosslinked composites. The values of storage modulus and loss modulus were improved while that of loss tangent was reduced with the presence of DCP in the composites. Earlier, the addition of higher content of zeolite particles had increased the magnitude of elastic modulus and loss modulus of both uncrosslinked and crosslinked composites. However, the intensity of loss tangent peaks decreased. Furthermore, the study of thermal properties of the composites was carried out using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results from TGA and DSC showed that the zeolite loading as well as the presence of DCP, had an influence on the thermal stability and crystallinity of EVA/zeolite composites.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115122211","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}

引用次数: 2

Environmental And Multi-reinforcing Effects Of Micro And Nano Fibers On Adhesion Properties Of Slow Setting Epoxy Adhesives 微纳纤维对慢凝环氧胶粘剂粘接性能的环境和多重增强效应

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/017

J. R. Lee, B. Kim, B. K. Park, D. Oh, S. Lee

引用次数: 0

Development Of Innovative Bio-inspired Nanocomposites Using Electrophoretic Deposition And Hydrothermal Recrystallization 利用电泳沉积和水热重结晶技术开发新型仿生纳米复合材料

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/005

C. Weiss, P. Malone, R. Moser, P. Allison, R. G. Hidalgo-Hernandez, O. R. Negron, M. Chandler, Sean W. Morefield, Kevin Torres-Cancel

{"title":"Development Of Innovative Bio-inspired Nanocomposites Using Electrophoretic Deposition And Hydrothermal Recrystallization","authors":"C. Weiss, P. Malone, R. Moser, P. Allison, R. G. Hidalgo-Hernandez, O. R. Negron, M. Chandler, Sean W. Morefield, Kevin Torres-Cancel","doi":"10.2495/978-1-78466-167-0/005","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/005","url":null,"abstract":"For decades, researchers gradually unveiled the fascinating design principles that give biomaterials extraordinary properties and functionality. The US Army Engineer Research and Development Center (ERDC) is incorporating these design principles to develop hierarchical materials for structural applications. Electrophoretic deposition is one method being explored to create the hierarchical structures. This research details the synthesis of hierarchical nanocomposites composed of calcium carbonate by using electrotransport and electrophoretic deposition to migrate calcium and carbonate ions through a polymer matrix. This process allows better control of the crystal form, size, and location in the polymer matrix, allowing for fabrication of composite materials with optimized mechanical properties for various loading conditions. Other research efforts focused on the use of hydrothermal processing techniques to promote the oriented recrystallization of calcium carbonate. These techniques are being used successfully to fabricate composites for characterization and mechanical testing.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131921508","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}

引用次数: 0

Microstructure And Mechanical Properties Of Cold Extruded, Cellular TRIP-matrix Composite Structures Under Quasi-static And Dynamic Compression 准静态和动态压缩下冷挤压细胞状TRIP-matrix复合材料的组织和力学性能

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/013

L. Krüger, D. Ehinger, U. Martin, S. Martin, C. Weigelt, C. Aneziris

{"title":"Microstructure And Mechanical Properties Of Cold Extruded, Cellular TRIP-matrix Composite Structures Under Quasi-static And Dynamic Compression","authors":"L. Krüger, D. Ehinger, U. Martin, S. Martin, C. Weigelt, C. Aneziris","doi":"10.2495/978-1-78466-167-0/013","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/013","url":null,"abstract":"Novel composites based on austenitic stainless TRIP steel AISI 304 as a matrix with reinforcements of MgO partially stabilized zirconia (Mg-PSZ) were developed. The presented honeycomb materials were produced by a modified ceramic extrusion technology that is composed of mixing precursor powders with binders, paste preparation and plastic molding, finally debinding and sintering. After processing, sintered products have a global density in the range of 2.7 to 3.0 g cm –3 and a wall thickness of 260 µm. These square-celled honeycomb samples are characterized by optical and scanning electron microscopy before and after quasi-static or dynamic compressive deformation, indicating a noticeable deformation-induced martensite formation. The mechanical properties of samples with up to 10% Mg-PSZ are compared with zirconia-free samples in terms of compression tests at strain rates in the range of 10 –3 to 10 2 s –1 . The honeycomb composite materials exhibit an increased work hardening and also extraordinary high specific energy absorption per unit mass and unit volume, respectively. According to improved property-weight-ratio and excellent crashworthiness, such filigree cellular structures can be beneficial as crash absorbers or stiffened core materials in aerospace, railway or automotive applications.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116873450","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}

引用次数: 1

Evaluation of blank holder force effects on carbon fiber non-crimp fabric formability by a non-contact 3D strain measurement system 用非接触式三维应变测量系统评价压边力对碳纤维无卷曲织物成形性的影响

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI: 10.2495/978-1-78466-167-0/007

K. Tanaka, R. Ushiyama, T. Katayama, S. Enoki, H. Sakamoto

{"title":"Evaluation of blank holder force effects on carbon fiber non-crimp fabric formability by a non-contact 3D strain measurement system","authors":"K. Tanaka, R. Ushiyama, T. Katayama, S. Enoki, H. Sakamoto","doi":"10.2495/978-1-78466-167-0/007","DOIUrl":"https://doi.org/10.2495/978-1-78466-167-0/007","url":null,"abstract":"Non-crimp fabric (NCF) consists of unidirectional plies, which are kept together by stitching yarns arranged in a number of different orientations relative to the fabric production direction. Since NCF has no crimp, it can take full advantage of the continuous carbon fibers. As NCF is deformed mainly due to shear, it is difficult to form 3D shapes from it. Therefore, formability improvement of NCF by slitting a textile preform has been attempted; however, problems such as strength degradation at a notch and cost increase due to the increase of working process have occurred. Thus, it is necessary to improve the formability of NCF without slitting. One of the methods of formability improvement is to use a blank holder. In previous studies, though the influence of the blank holder force on formability of woven fabrics has been clarified, that on formability of NCF is uncertain. In this study, the hemispherical punch drape test was conducted to evaluate the influence of blank holder force on the formability of NCF. At the same time, the deformation of NCF during the drape test was measured by a non-contact 3D strain measurement system.","PeriodicalId":336954,"journal":{"name":"WIT Transactions on State-of-the-art in Science and Engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116902603","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}

引用次数: 0