• Journal of the Korean Society of Hazard Mitigation
• /
• 제8권3호
• /
• pp.1-9
• /
• 2008

Fiber Reinforced Polymer (FRP) composites are used extensively in aerospace, marine, automotive, infrastructure, chemical processing and sporting good applications. A concern with using FRP composites in some engineering structures is their high flammability and poor fire resistance In this research, material properties of FRP composites at increasingly high temperatures was measured and verified. The obtained mechanical properties of FRP composites were performed according to ASTM D3039/D3039M and tested to a wide range of heat conditions with temperatures from Room-temp. to 300 for times up to 30 min. It is found that the mechanical properties of FRP composites dropped with increasing heat or temperature. The reduction to the properties was due mainly to thermal degradation and combustion of the polymer matrix.

• Journal of the Society of Disaster Information
• /
• 제8권4호
• /
• pp.391-400
• /
• 2012

Recently, the construction industry commonly uses FRP as a reinforcement material because of its material advantages. FRP attached reinforcement has various advantages such as high strength, stiffness, excellent durability and construction practicability comparing to its weight. However, external attachment of FRP is water-tighted with low water permeable material, not draining water, probably causing damages on a permanent structure. The study manufactured it through pultrusion and examined GP(glass fiber panel) of which material-mechanical properties are almost same as the existing FRP but durability and attachment performance are better by stationary experiments, testing load-deflection curve, destruction types and load-deflection relation under repetitive loading test. As a result of 2,000,000 fatigue tests, it did not result in the destruction and showed excellent permanent attachment and durability as it displays significantly low compressive strain of concrete.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• 제17권5호
• /
• pp.80-85
• /
• 2016

Carbon fiber-reinforced composite materials have been widely used in various industrial fields, but there are limits to increasing their strength and stiffness, because of the short-length fibers that are impregnated in them. In this study, a lab-scale small extruder system was developed with the capability to perform the carbon fiber impregnation and extrusion process in order to evaluate the properties of long-length carbon fiber reinforced thermoplastic composite materials molded by the LFT-D method. Specimens were made with the small extruder to press-mold long-length carbon fiber composite materials and evaluate their material properties. As a result, it was found that the carbon fiber length, press load and carbon fiber contents have a considerable influence on the strength and stiffness. Additional studies on such factors as the mixing screw design and coating of the carbon fiber are needed in order to improve the mechanical properties of carbon fiber composite materials.

• Journal of the korean Society of Automotive Engineers
• /
• 제18권5호
• /
• pp.96-120
• /
• 1996

현재 자동차용 복합재료를 생산하는데 유리한 제조방법으로는 압축성형 (Compression Molding), 액상성형(Liquid Molding), 인발성형(Pultrusion), 필라멘트 와인딩성형(Filament Winding)등이 있다. 압축성형은 현재 자동차 외장부품 성형에 널리 알려져 있는 SMC(Sheet Molding Compound)성형, 최근에 많은 연구가 되고 있는 LMPC(Low Pressure Molding Compound)성형, GMT(Glass Mat Reinforced Thermoplastics)성형 등이 있다. 액상성형은 RTM(Resin Transfer Molding)과 VARI (Vacuum Assisted Injection Molding), SRIM(Structure Reaction Injection Molding) 등이 있으며, 자동차 산업뿐만 아니라 일반 산업에서도 최근 많은 각광을 받고 있다. 그러므로 본 소고에서는 자동차용 복합재료의 제조에 널리 사용되는 성형공정에 대하여 간단히 살펴보고, 자동차 부품에 있어서의 복합재료 응용 현장과 최근 환경문제가 대두되면서 관심의 초점이 되고 있는 자동차용 복합재료 재활용 기술에 대하여 고찰하고자 한다.

• Fashion & Textile Research Journal
• /
• 제11권5호
• /
• pp.840-845
• /
• 2009

The purpose of this study is to analyze the trends of technique development of domestic textile industry and to guide the directions for researches to secure competitiveness of textile industry by analyzing domestic patent applications. This research used patent literature from Korean Patent Information database provided by Korea Intellectual Property Rights Information Service(KIPRIS), and the patent search scope, based on the application year, was from 1980 to 2007. The number of patents by natives was lower than that of foreigners in 1980's, but from the mid 90's, that number grew larger than that of foreigners. Also the number of patents by natives have shown steadily increasing tendency. However, the number of foreigner's patent in D03, D04, D05 of class was higher than the number of patents by natives. The technical fields where the patent application ratio is high varied from one country to another. In Korea, D01F of subclass had the most number of patents, and D05B, D04B had the most number of patents in Japan and Germany.

• Composites Research
• /
• 제18권4호
• /
• pp.8-13
• /
• 2005

Rotating circular disks are widely used in data storage devices as well as in traditional industrial machines. Faster rotating speed is required in data storage devices for higher data transfer rate. In this Paper an application of composite materials to CD is proposed to increase critical speeds and the strength analysis was performed. A differential equation of displacement is derived for the analytic stress distribution of rotating polar orthotropic disk. The stress distributions for typical GFRP and CFRP disks and the maximum allowable speeds subjected to a constraint of tensile strength are presented in addition to polycarbonate disk. The results show that the application of CFRP to rotating disk can increase the maximum allowable rotating speed but this may not be applicable to GFRP disk.

• Archives of design research
• /
• 제17권2호
• /
• pp.363-372
• /
• 2004

In the new millenium of information and digital age, the vogue cycle has been gelling shorter and shorter and the individualistic and high quality preference of contemporary consumers drive the small quantity production by order. The traditional screen printing system can not hold the competitive edge anymore. In order to actively meet the demand of the fast evolving market, compete with other nations, and produce high value-added products, we need the new production system to meet the individual needs promptly. Mass production using the traditional screen printing system has the economic advantage of the production speed and cost. The digital textile printing system digitalizes the total process from the design to the printing and omits the separation and engraving. It is more suitable to produce the multiple item-small quantity and add more values to its products. It has also the advantage of less pollution problem.

• Journal of Internet Computing and Services
• /
• 제9권5호
• /
• pp.99-108
• /
• 2008

This paper proposes an image retrieval system which integrates metadata, contents, and emotions in textile images. First, the proposed system searches images using metadata. Among searched images, the system retrieves similar images based on color histogram, color sketch, and emotion histogram. To extract emotion features, this paper uses emotion colors which was proposed on 160 emotion words by H. Nagumo. To enhance the user's convenience, the proposed textile image retrieval system provides additional functions as like enlarging an image, viewing color histogram, viewing color sketch, and viewing repeated patterns.

• The Research Journal of the Costume Culture
• /
• 제16권1호
• /
• pp.22-32
• /
• 2008

The purpose of this paper is to compare and analyze the national brand strategies between Korea and Italy and the ragional brand strategies between Jinju in Korea and Como in Italy. The study is conducted via periodicals and publication of related institutions, reports of various newspapers and academic journals, and interviews of Jinju Silk Research Institution and Tessile di Como. This study then examines the implication of the success of Italian national and regional brands to the Korean textile products and the adoptability of Italian brand strategies for Korean textile brand. Our findings suggest that the Italian brands have been successfully developed in terms of product quality and brand marketing based on their traditional products. The findings also indicate that the Korean traditional textile products have the potential to be the world wide products but lack the consist and brand strategies supported by the central government as well as the regional government. This paper further suggests that it is necessary to study the development of brand strategy based on the traditional textile products and its implimentation.

• Journal of Fashion Business
• /
• 제12권5호
• /
• pp.155-167
• /
• 2008

With globalization and competitive market environment, companies realize how marketing channels are important in order to survive and succeed the business. The importance of information management among channels is getting increased, and is needed for SCM. Nevertheless having hard situation to implement SCM, SCM for textile fashion industry engaged in small business mostly is the way to break through the difficulty on so many channels to go through from fiber to retail. Therefore, the purpose of this case study to L firm by using questionnaire based interviewing method was to investigate how textile fashion small business can implement the SCM with their own differentiated strategy differed from a large corporation. L firm conducted SCM-ISN (Information Service Network) under the restructuring project. So they could use electronic bidding system via internet and have information sharing with their partners such as retailers. Therefore, they could expand market share to Seoul and reduce inventory and manage their customer more effectively than before.