• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2001년도 춘계학술발표대회 논문집
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• pp.189-192
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• 2001

Resin transfer molding process has been widely used in the automobile industry, because the product with large area can be manufactured easily and the cost for the manufacturing is lower than that of compression molding and hand lay up method. Since RTM process is suitable for large bus housing panels, in this work, the composite housing panel was manufactured by RTM process and the mechanical properties, surface quality and the condition of manufacturing process were studied.

• 한국항공우주학회지
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• 제38권12호
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• pp.1209-1216
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• 2010

본 연구는, 위성에 장착되는 각종 전자장비 하우징을 종래의 알루미늄 합금에서 복합재료로 대체함으로써 위성 경량화를 극대화할 수 있는 대안을 다루었다. 이를 위해, 기존 전자장비 하우징 재료로 널리 사용되는 알루미늄 합금에 비해 가벼우면서, 충분한 내구성과 다양한 기능성을 제공하는 복합재료 전자장비 하우징 설계를 위한 요구사항을 정의하였다. 또한, 열전도도, 전기전도도, EMI 보호, 방사차폐 특성과 더불어 강도가 우수한 구조적 특성을 갖춘 경량 복합재료 전자장비 하우징을 모듈화 방식으로 제작하기 위한 개념설계를 수행하고, 위성설계에 있어 무게절감을 크게 향상할 수 있는 가능성을 제시하였다.

• 한국항공우주학회지
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• 제41권12호
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• pp.975-986
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• 2013

기존 위성 전자장비 하우징에 널리 사용되는 알루미늄 합금 소재를 경량 복합재료로 대체함으로써 위성 경량화를 크게 개선하고자, 경량 복합재료로 구성된 전자장비 하우징을 제작하고 성능 검증에 대하여 다루었다. 이를 위해 복합재료의 낮은 가공성을 극복하기 위하여 후처리를 최소화할 수 있는 복합재료 하우징 제작공정을 설계하고, 격자 구조로 강화된 일체형 하우징 본체를 동시경화 방법에 의해 제작하였다. 또한 제작된 전자장비 하우징의 내구성, 강성, 열전도도, 전기전도도, EMI차폐 및 방사차폐에 대한 성능 평가 결과를 분석하였다. 아울러 본 연구에서 제작한 복합재료 하우징은, 동일한 형상의 알루미늄 하우징 대비 상당한 질량절감을 가능하게 함을 제시하였다.

• KIEAE Journal
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• 제15권5호
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• pp.47-57
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• 2015

Purpose: The purpose of this study is to set the type of 'the New-hanok type Public Buildings' through a case study for the hanok public buildings completed after 2000 years, and to analyze planned properties of the type. This is significant Establishing legal status of 'the New-hanok type Public Buildings' and seeing review of application possibilities of the type for providing a systematic government support measures of 'the New-hanok type public buildings' when models developing future. Method: Method of research is the first to examine the current laws and established the definition and legal status of 'the New-hanok type Public Buildings'. Followed by Setting the type classification criteria as to classify the type of 'the New-hanok type public buildings' and research architectural overview of selected cases by Literature, Internet searches, etc. After systematizing of the types classification of analysis cases, Characteristics of the type of the building structure looks catch classify in spatial structure, function, beauty. Finally, review application possibilities of the type for systematic government support measures establish when models developing of 'the New-hanok type Public Buildings' through a comprehensive analysis. Result: Selected cases were categorized as 3 types according by structural standard based on the core concept of 'the New-hanok type Public Buildings' set in this study. This can be divided into 'Wooden Structure type' and 'Composite structure - Convergence type' and 'Composite structure - juxtaposed type', 'Wooden Structure type' was re-classified by divided into '(1)Traditional Korean Wooden Structure' and '(2)Laminated Wood Wooden Structure'.

• 한국주거학회논문집
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• 제23권3호
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• pp.71-78
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• 2012

This study analyzed metaphorical characteristics of composite materials in terms of a visual aspect on a new material that is applicable for housing space. The results are as follows. First, the recent trend of housing space tends to stimulate emotions of residents through visual finishing materials, and for this reason, visual expression of a new material that is applicable to finishing materials plays an important role. Second, convertibleness, association and duplicity were selected as items of metaphorical expressions through the precedent studies. Third, most of combinations of materials were shown different from the existing materials in an expressive characteristic of composite materials through analysis, and application of a technology showed a different visual effect of patterns and textures from the existing materials. This implies that visual expression and directing are being attempted using such technology on finishing materials of housing space with development of digital technologies. Fourth, for metaphorical characteristics of composite material for housing space, combination of various materials and a digital technology were applied on convertibleness. For association, a combination of materials that have each different characteristic associated with the third material, and combination with subsidiary material of optical fiber and a digital technology were appled for duplicity. Data obtained from the results of this study has high efficiency in planning finishing materials for emotional housing space in future, and it will be basic data for a study on development of new finishing materials.

• 대한가정학회지
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• 제26권2호
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• pp.49-67
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• 1988

The purpose of this study was to present a conceptual model for predicting housing quality. Housing quality was measured in three ways: perceived quality about physical features of houses, perceived level of the quality in comparison with perceived average level I urban area and housing satisfaction. The specific objectives to achieve the purpose were ; 1) to measure the perceived quality about physical features of houses and perceived level of the quality in comparison with the perceived average level I urban 2) to measure the level of housing satisfaction 3) to clarify the causality between the composite variables of housing quality. A final instrument was developed through two stage pilot surveys. The respondents were 1292 homemakers of middle and high economic class in seoul and Daejeon, selected through stratified random sampling technique. Data were collected during March and April, 1986, and analyzed using SPSS and SAS computer packages. The statistics used were frequency, percentage, F-test, Duncan's Multiple Range, x2, Cramer's V, Multiple linear Regression, Path analysis. The major finding were as follows; the variables significantly related to predict the housing quality were found. The simple, composite variables and 3 measures of housing quality were linked using path analysis, thereby a conceptual model predicting housing quality was suggested.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.1109-1112
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• 2004

This study reports on the pressure relief design and braided composite of surge arrester. Surge arresters with porcelain housing must not have explosive breakage of the housing to minimize damage to other equipment when subjected to internal high short circuit current. As a solution, this study describes pressure relief design performance of arresters with braided composite module. In general, braided composite has Potential for improved impact and delamination resistance. Manufacturing processes of the braided composite could also be automated and could potentially lead to lower costs. Therefore, in consideration of characteristics of pressure relief for polymer arrester, the fabric pattern of braided composite was decided. And Polymer arrester module was manufactured with braid. The mechanisms of pressure occurrence and relief were investigated basically by analyzing arc energy and the correlation between thermal shock and indoor pressure in pressure relief test.

• 한국산학기술학회논문지
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• 제20권3호
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• pp.609-616
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• 2019

본 논문에서는 재난 재해시 이재민의 주거안전성을 확보하기 위해 단기 임시주거시설에 대한 설계 계획과 목업 제작을 통한 시공성, 주거환경성을 검증하였다. 특히, 재난 재해발생시 이주민이 응급구호시설로 인근 학교의 강당 또는 체육관을 활용하고 있지만 거주성이 확보에 문제가 있다. 이를 극복하기 위한 방안으로 30일 이내 거주하는 단기 임시주택을 제안하는 것이 연구목적이다. 이를 위해 경량이면서 단열이 확보가능한 복합패널을 선정하여 목업을 제작하였다. 복합 패널을 활용한 목업은 약 1시간안에 완성하여, 시공 용이성을 확인하였다. 또한 목업을 통해 실험실에서 결로와 누수실험을 진행하였다. 외부온도 약 $0^{\circ}C$, 실내온도 약 $32^{\circ}C$로 온도에서 결로현상은 발생하지 않았고, 열화상카메라를 통해 확인해보면 단열성능이 확보되는 것으로 판단되었다. 또한 시간당 60 mm의 강우를 모사하여 누수 실험을 진행한 결과 누수가 확인되지 않아 방수성능이 확보되는 것으로 판단된다. 본 연구는 기존 임시주거시설에서 모듈화된 평면, 시제품제작을 통한 시공용이성 확보, 향후 적재의 용이성을 확인하였다. 단열 및 방수성능이 확보되는 것을 확인하였다. 이를 통해 단기 임시주거시설에 대한 대안을 제시하였다.

• 한국군사과학기술학회지
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• 제11권4호
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• pp.149-158
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• 2008

This article provides strength estimation of T-joint area which made of composite material. Inner and outer structures of medium range surveillance radar are all made of sandwich structure which is made with composite material(CFRP) and aluminum honeycomb core. Since the radar is voluminous and has very complex inner structure, the whole structure cannot be made as one piece. Therefore, usage of T-joints is inevitable. Since some of stress concentration areas were located around T-joint area, series of strength estimations were conducted. Three different configurations were tested to improve mechanical properties(primarily on strength). The results show an improvement on strength to meet calculated strength on stress concentrated T-joint area.

• 유통과학연구
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• 제17권1호
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• pp.11-19
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• 2019

Purpose - We document the impact of economic policy uncertainty (EPU) in the US and China on the dynamic spillover effect of macroeconomics such as stock price, housing price in Korea. Research design, data, and methodology - We use the nine variables to analyze the effect which produces a result among the EPU indexes of the US and China on economic variables which is the consumer price index (CPI), housing purchase price composite index, housing lease price, the stock price index in banking industry, construction industry and distribution industry, and composite leading indicator from January 1995 to December 2016 with the Vector Error Correction Model. Result - The US EPU index has significantly a negative relation on the CPI, housing purchase price index, housing lease price index, the stock price index in banking industry, construction industry, and distribution industry in Korea. Conclusions - We find the dynamic effect of the EPU indexes in the US and China on the macroeconomics returns in Korea. This study has an empirical evidence that the economy market in Korea is influenced by the EPU index of the US rather than it of China. The higher EPU, the more risky the economy of in Korea.