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HYDROPLANING ANALYSIS BY FEN AND FVM:EFFECT OF TIRE ROLLING AND TIRE PATTERN ON HYDROPLANING
Y. NAKAJIMA,E. SETA,T. KAMEGAWA,H. OGAWA 한국자동차공학회 2000 International journal of automotive technology Vol.1 No.1
The new numerical procedure for hydroplaning has been developed by considering the following three important factors; fluid/structure interaction, tire rolling, and practical tread pattern. The tire was analyzed by FEM with Lagrangian formulation and the fluid is analyzed by FVM with Eulerian formulation. Since the tire and the fluid arc modeled separately and their coupling is automatically computed by the coupling element. the fluid/structure interaction of the complex geometry such as the tire with the tread pattern can be analyzed praetically. We verified the predictability of the hydroplaning simulation in the different parameters such as the water flow, the velocity dependence of hydroplaning. and the effect of the tread pattern on hydroplaning. In order to predict the streamline in the contact patch. the procedure of the global-local analysis was developed. Since the streamline could be predicted by this technology, we could develop the new pattern in a short period based on the principle; "make the stream line smooth",<br/>
HYDROPLANING ANALYSIS BY FEM AND FVM - EFFECT OF TIRE ROLLING AND TIRE PATTERN ON HYDROPLANING
Nakajima, Y.,Seta, E.,Kamegawa, T.,Ogawa, H. The Korean Society of Automotive Engineers 2000 International journal of automotive technology Vol.1 No.1
The new numerical procedure for hydroplaning has been developed by considering the following three important factors; fluid/structure interaction, tire rolling, and practical tread pattern. The tire was analyzed by FEM with Lagrangian formulation and the fluid is analyzed by FVM with Eulerian formulation. Since the tire and the fluid are modeled separately and their coupling is automatically computed by the coupling element, the fluid/structure interaction of the complex geometry such as the tire with the tread pattern can be analyzed practically. We verified the predictability of the hydroplaning simulation in the different parameters such as the water flow, the velocity dependence of hydroplaning, and the effect of the tread pattern on hydroplaning. In order to predict the streamline in the contact patch, the procedure of the global-local analysis was developed. Since the streamline could be predicted by this technology, we could develop the new pattern in a short period based on the principle; "make the stream line smooth".
Ti - V - Cr BCC Alloys System with High Protium Content
Okada, M,Kuriiwa, T,Tamura, T,Takamura, H,Kamegawa, A 대한금속재료학회(대한금속학회) 2001 METALS AND MATERIALS International Vol.7 No.1
This paper aims to study the relationship between the protium absorption properties and alloy composition of Ti-V-Cr alloys. We studied the effects of composition of the alloys and the heat-treatment on the protium absorption-desorption properties of Ti-V-Cr alloys, and found that Ti-35V-40Cr alloys show 2.6 mass% protium capacity. The plateau pressure of the alloys increased with decreasing lattice constants, resulting from increasing Cr content. The main phase of the samples containing more than 15%V was a BCC phase in the cast state. These BCC phase alloys exhibited 2.4 mass% protium. It was also found that the heat-treatment was effective in stabilizing a BCC structure in Ti-V-Cr alloys with low V content. The alloy yields the high capacity of 3.0 mass% protium capacity, which will be the highest value at 313 K reported so far. The alloy will be promising since it contains a low amount of the expensive V element.