• 한국산학기술학회논문지
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• 제9권5호
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• pp.1102-1106
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• 2008

다양한 기계적 거동을 관찰할 때 예상되는 역효과의 측정 방법을 연구하는 것이 필수적이고, 고무 호스, 알루미늄 sleeve와 pipe에 의해 만들어진 Automotive Air-Conditioner-Hose의 응력과 변형 특성을 측정할 수 있다. 본 연구에서는 자동차에 있어 에어컨 냉매 순환에 중요한 역할을 하는 Automotive Air-Conditioner-Hose의 응력과 변형 특성을 유한요소법을 이용하여 분석하였다.

• 동력기계공학회지
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• 제14권6호
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• pp.54-60
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• 2010

The automotive air conditioning hose is used for connecting the components of air conditioner in a vehicle. The hose is usually manufactured by the swaging process to connect the rubber hose with the metal fitting at the end of the hose. The swaging process leads to various stress and strain configurations in the hose, which give a critical effect on the hose performance. In this paper, the deformation characteristics of an air-conditioning hose during the swaging process were analyzed using the nonlinear finite element method. Especially the rubber layers, which are contacted with the metal fittings, were divided with finer mesh density than the reinforcement braids to increase the solution accuracy. The material properties were obtained from experimental data, and the contact conditions were used in consideration of the real manufacturing process.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2008년도 춘계학술발표논문집
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• pp.296-298
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• 2008

It's necessary to analyze the mechanical behaviors of automotive air-conditioner hose, which have to play a proper role under severe operating conditions, in order to prepare a preventive measure for contrary effects expected in unfavorable circumstances. In this paper, the stress and deformation characteristics of the hose components such as rubber, sleeve, pipe and reinforces braids during the swaging process, are analyzed using the finite element method.

• 한국기계가공학회지
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• 제10권3호
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• pp.39-46
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• 2011

The automotive air conditioning hose is used for connecting the components of air conditioner in a vehicle. The hose is usually manufactured by the swaging process to connect the rubber hose with the metal fitting at the end of the hose. In case that the clamping force is small, the refrigerant gas in the hose can leak locally under the severe operating circumstances. The practical test of clamping force is performed by means of the measurement of separation force. In this study, the swaging process of a hose is simulated with the finite element method, to investigate the effect of friction coefficient on the clamping force. The contact condition is used in consideration of real manufacturing process, and the material properties for the Mooney-Rivlin model is obtained by the experimental results. The result interpretations are focused on the contact forces, which is displayed graphically with respect to friction coefficient, on the surfaces between the hose and the metal fittings.

• 한국의류학회지
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• 제23권7호
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• pp.1019-1029
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• 1999

In order to find out the influences upon not only the thermal resistance of human body but also the clothing action and the clothing weight which are caused by the differences in the thermal living conditions by using air conditioner and so on to adapt themselves to the changes of their residential environment according to the changes of seasons we investigated the clothing practices upon the male and female students in Seoul and Korean male and female students in Yanbian who are estimated to have different thermal living conditions in spite that they are same folk as well as living in the same age. 1. The total clothing weight of body surface erea was increased in order of summer autumn spring and winter seasons and by seasons the changes of the clothing weight were found in both areas, In Seoul the changes of upper outwear clothing weight were found on both sexes but in Yanbian the changes of underwear weight were found on both sexes. And the underwear weight of both sexes in Seoul was lighter than that of both sexes in Yanbian. 2. Those in Seoul tended to fell colder in winter and hotter in summer than those in Yanbian on account that the formers are more sensitive of thermal conditions than the latters. 3. Comparing clo-value claculated by the fomula of with the Winshlow's clo-value those in Yanbian had higher thermal resistance than those in Seoul. Consequently those in Seoul adapted thermselves to the seasons by controling the upper outwear weight but those in Yanbian did it with underwear weight, The male and female students in Seoul tended to feel colder in winter and hotter in summer than hose in Yanbian because the thermal sense of the former is more sensitive than that of the latter.