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편지현(J. H. Pyun),강원구(W. G. Kang),김효경(H. K. Kim),하종배(J. B. Ha) 한국자동차공학회 1997 한국자동차공학회 학술강연초록집 Vol.1997 No.4
As the competition of the automotive industry has risen. efficient plastic materials are now being used to reduce weight. cost. and noise. These apply to underhood parts as well as interior/exterior parts in automobile. The representative plastic example of replacing aluminum materials in underhood parts is an air intake manifold which is to be used nylon resins as substitute materials. As nylon air intake manifolds continue to grow in automotive applications. trends in assembly techniques and system integration will affect material performance requirements and final material selection. Keeping these trends in mind. this paper will examine several nylon materials in relation to material requirements( heat resistance. chemical resistance. weld ability . burst pressure test etc )
김용재(Y. J. Kim),강원구(W. G. Kang),김수겸(S. K. Kim),김지석(J. S. Kim),김준영(J. Y. Kim),신동준(D. J. Shin),윤삼손(S. S. Yoon),류시양(S. Y. Ryu) 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.5
The size of electronic devices is becoming miniaturized and performances are becoming more and more high function. So power consumption of the product is greatly increased. And, in the progress of product development, thermal design is a very important task. In the thermal design process, we need many climate chambers to measure temperature of electronic components and check operation of the products under cold and hot environments. However, the climate chamber needs expensive maintenance cost and occupies large space. This is a huge burden to the company. Most developers replace high-temperature tests by low cost room temperature tests. There is an issue how much value the developers add to the results of room temperature tests for converting to the results of high temperature tests. In this paper, some results based on tests and thermal simulation analyses have been reported to suggest the value.