• 한국자동차공학회논문집
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• 제13권4호
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• pp.1-7
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• 2005

In vehicle door system, weatherstrip seals protect passengers form noise, dust, rain and wind out of the vehicle. The higher efficient a weatherstrip is, the more durable it is in contact between the door and body frame. In this study, nonlinear finite element(FE) analysis is performed to obtain cauchy-stresses, displacements and reaction forces of the weatherstrip. Mechanical properties of the weatherstrip is obtained by uniaxial tension test. The MARC which is a commercial software for the nonlinear analysis of a flexible FE model is used. Twenty-one cases of the FE model are developed by using Ogden-foam formulation. In the results of nonlinear FE analysis, the most valuable deformation of the weatherstrip occurred when displacement control value reaches 7.2mm. Severe deformation is observed as the displacement control value become more increased. When the weatherstrip is designed, it would be considered that the displacement value of the weatherstrip has to be less than 7.2mm.

• 소성∙가공
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• 제15권4호
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• pp.289-294
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• 2006

To reduce automobile parts weight, TWB(tailored welded blank) forming is widely used in panel forming. But products used TWB forming process have many defect, wrinkle, crack and springback. So study of TWB forming process character is very important. In this study one of the current problems of TWB forming was analyzed, especially for the try-out process of inner door panel without frame. A comparison was made between actual measurements and prediction of forming analysis for formability and springback. Also a new analysis die model which have additional plane on die surface was proposed to correct result of forming analysis. This proposed method overcomes the difference for TWB forming result between try-out and analysis.

• 대한안전경영과학회지
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• 제10권1호
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• pp.205-213
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• 2008

Servicizing is defined 'not as to sell the products but as to sell the functions'. This study was done on the methods for revitalization as the object items of navigation & antenna among car parts. The direct door-to-door survey was done for 101 enterprises (direct-management stores) and percentage & t-test were done for statistics. The results can be summarized like followings. First, PR on servicizing is required. Second the optimized methods can be obtained by incorporating reuse & recycling distribution systems of servicizing with the existing recovery system Reuse distribution system can be constructed rationally because inventory control is being done correct1y with the periodic recovery. Finally, as for the analysis on the relative importance of main factors of servicizing, it shows that supports & providing the concrete frame of the government & local autonomous body are important.

• 한국가구학회지
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• 제28권3호
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• pp.207-223
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• 2017

Jeonju-Jang is the wood furniture that was made in Chonbuk Jeonju province during the Joseon Dynasty, and was used by middle-upper social classes. It has value as a local cultural heritage because it has unique characteristics in terms of the shape of the furniture, the metal ornament and various functions are integrated in accordance with user's requirements. Therefore, the purpose of this study is to define the structural characteristics of the Jeonju-Jang through case studies of 16 existing artifacts in order to preserve and inherit the value as local cultural resources. The conclusion is as follows. First, Jeonju-Jang in the late period of Joseon Dynasty that is made up of one board to the bottom with the binding of the board. and the front wall, the Juibyuckkan and the Meoruemkan are omitted or made small, so the structure of the surface is simple. There are three or four drawers under the Cheon pan(top plate). There are drawers and shelf inside the hinged door. In the case of a two-layer type, there is a Gaegumeong type door which has half of one side hinged. Second, Jeonju-Jang of the Japanese Ruling Era had a Juibyuckkan by frame binding and an increase in the number of Meoruemkan. and it had independent legs. The Cheon-pan(top plate) was more left and right than both sides. Third, in the late Joseon Dynasty period as a feature of the metal ornaments, cast iron and yellow brass were used as materials. In the Japanese Ruling Era, nickel was mainly used. Various patterns were engraved and the number increased, and it became gorgeous surface as a whole.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 춘계학술대회 논문집
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• pp.455-462
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• 2000

The characteristic of “Korea LRT Carbody” is designed by using AED(All Extrusion Design) method. This is developed in Europe and be introduced in this paper minutely. The window type of “Korea LTR” has no supported frame, so the passengers ensure the outside view widely. The passenger's door will designed by plug type - This is the first time in Korea. In this report we have an object to the strength analysis for the carbody design. For the purpose of safety and lightening, we are going to research the section of thickness through optimization design.

• Journal of the Korean Wood Science and Technology
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• 제42권2호
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• pp.89-100
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• 2014

Energy consumption statistics in 2005 from the Korea Energy Management Corporation show that building energy usage was about 24.2% of total domestic energy consumption, and 64% of total building energy usage was consumed by residential buildings. Thus, about 10% of total domestic energy consumption is due to the heating of residential buildings. Building energy can be calculated by the configuration of the building envelope and the rate of infiltration (the volume of the infiltration of outdoor air and the leakage of indoor air), and by doing so, the annual energy usage for heating and cooling. Therefore, air-tightness is an important factor in building energy conservation. This investigate air infiltration and various factors that decrease it in timber frame buildings and suggest ways to improve air-tightness for several structural types. Timber frame buildings can be classified into light frame, post and beam, and log house. Post and beam includes Han-ok (a Korean traditional building). Six light frame buildings, three post and beam buildings, one Korean traditional Han-ok and a log house were selected as specimens. Blower door tests were performed following ASTM E779-03. The light frame buildings showed the highest air-tightness, followed by post and beam structures, and last, log houses.

• 농업과학연구
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• 제21권2호
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• pp.103-110
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• 1994

국내시장(國內市場)에 안정적(安定的)인 공급(供給)이 가능한 온대(溫帶) 침엽수재(針葉樹材)를 남양(南洋) 활엽수재(闊葉樹材) 문틀재의 대체재(代替材)로 사용하기 위해 K등급(等級) 북미침엽수재(北美針葉樹材)의 옹이 분포도와 가공(加工) 후(後) 틀어짐 정도, 그리고 생산 수율(收率)과 단가(單價)을 조사하였다. D-fir와 W.hemlock를 문틀가공(加工) 전에 옹이 크기와 분포(分布)에 따라 등급판정(等級判定)한 결과(結果), 기둥재로 쓸 있는 A급소재(級素材)의 비율은 D-fir가 36.4%, W.hemlock가 24.3%으로 D-fir가 높았으나 이는 두 수종의 등급판정(等級判定) 기준이 다른 때문이며 재색(材色)으로 보나 재질(材質)로 보나 W.hemlock이 문틀재로 쓰기에 더 적합하였다. 문틀당 평균(平均) 옹이수는 D-fir와 W.hemlock이 각각 7.2개와 3.4개이며 W.hemlock은 8개이상(以上) 옹이를 가진 문틀재가 없는 반면, D-fir은 8개이상(以上) 옹이를 가진 문틀재가 전체의 절반이나 되었다. 한편 D-fir는 옹이직경(直徑) 5cm이상(以上)이 11%인데 반해 V.hemlock은 35%였다. 따라서 D-fir는 작은 옹이가 많이 있으나 W.hemlock은 큰 옹이가 비교적 적게 분포됨을 알 수 있다. 틀어짐 측정장치(測定裝置)로 잰 D-fir의 최대최소(最大最小) 변형차(變形差)는 D-fir의 경우 문틀재에 따라 0.5부터 9.5mm까지 비교적 고르게 분포되어있는 반면 W.hemlock은 거의 대부분이 4.5mm이하(以下)에 몰려 있다. 6mm변형(變形)을 문틀재로 쓸 수 있는 한계점으로 볼 때 이 기준(基準)을 넘는 문틀재는 D-fir가 전체 21개 중 6개로 30%에 달하나, W.hemlock은 전체 25개 중 단 한 개만 있었다. 문틀재의 가공단계별(加工段階別) 원가(原價)를 산출(算出)한 결과(結果), D-fir는 1,993 원/재(才)였으며 W.hemlock는 1,697 원/재(才)였다. 이 차이(差異)는 주로 제재수율(製材收率)차에 기인한 것으로 보인다. 따라서 온대(溫帶) 침엽수재(針葉樹材) 문틀재, 특히 W.hemlock은 틀어짐이나 수율(收率), 가격에 있어 남양재(南洋材)와 충분한 경쟁력을 가지고 있으나 옹이가 없는 남양재(南洋材)에 길들여져 있는 소비자의 취향이 침엽수(針葉樹) 문틀재 시장(市場) 확장(擴張)에 중요(重要)한 요인(要因)으로 작용(作用)할 것이다.

• 한국산학기술학회논문지
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• 제15권10호
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• pp.5963-5967
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• 2014

본 자동차 충돌사고는 인간이 자동차 문명을 발전시킨 이래 누려온 편의성의 대가이기 때문에 많은 사람들이 충돌사고 시 승객의 사망과 상해를 기술적으로 감소시키기 위해 여러 가지 노력을 기울여 왔다. 도로교통공단 통계자료에 따르면 승용차 충돌사고로 인한 사망자 충 측면충돌사고에 의한 사망자가 정면충돌사고의 사망자보다 많다. 자동차 설계자들은 이에 대응하기 위해 도어 내부에 임팩트 빔(Impact Beam)과 임팩트 프레임(Impact Frame)이라는 보강재를 추가시켜 왔다. 이러한 보강재 개발을 위해 충돌실험은 필수적이다. 충돌실험의 경우 많은 비용과 시간이 소모되게 된다. 본 연구는 임팩터를 떨어뜨려 충격량과 변형량을 얻을 수 있는 실험장치 개발이 목적이다. 경제적 비용을 줄일 수 있는 이상적인 실험장치 구성을 제시하고, 수치해석 값과 실험결과 값을 비교 분석한 결과 충돌 시작 후 3.5E-3sec에서 각각 3.49E-3, 3.99E-3의 변형량을 나타냈다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.366-369
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• 2006

Multi Housing design has not considered the remodeling even at the beginning of the construction. This severely hindered systematic maintenance, providing fundamental causes of consuming society. In general, in about 20 years when the buildings become too old, they are brought down or removed with a trail of waste left behind. In addition, since the current remodeling or future remodeling type is a general remodeling that leaves only a frame, some question the role of the remodeling as a solution to the reconstruction from economically and environmentally efficient aspects. This study intends to find a solution for long-life span multi-family housing design, promoting sequential remodeling by stating the life cycle of components. Problems were identified by analyzing joints, design and construction of multi-family housing based on the previous researches. Conclusion from characterization of the design plan according to joint parts can be summarized as the following firstly, the problem of the wet was seen in joints between the structure and a finishing materials and ones between separate finishing materials. Secondly, the problem of overlap was frequently seen in joints between the structure and a door/window, ones between a door/window and a finishing materials, and ones between a finishing materials and an electrical/mechanical device.

• 한국주거학회논문집
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• 제5권2호
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• pp.29-40
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• 1994

The purpose of this study is to survey the transition of the type of openings in korean traditional archiectures. To do this, various types of openings at the backside of Daechung of 23 Hyang-Gyo Myung-Ryun-Dangs were investigated. After the classification in some groups according to their types and their periods of constuction, the tasnsition of the type of openings was analysed. Results are as follows. (1) The openings constructed form 16th to 17th century, the earliest form, is a ledged and battened panel window(or framed and ledged panel window) whose mullion is built on the frame of window. It is presumed that these types were widely used before 17th century. (2) The next type is ledged and battened panel window(door) (or framed and ledged panel window) which lacks a mullion. These types were thought to be customed after 18th century. (3) The lastest type, which is appeared from 19th to 20th century, is an characteristic backside opening(ledged and battened panel window or framed and ledged panel window) that among 3 column spacings the central one is enlarged in comparison with the right and left ones. Through this transition pattern of the openings, can be menifested that the trend of 20th century is to enlarge convenience of usage by constuctiong door and eliminating some windows.