• Transactions of the Korean Society of Mechanical Engineers A
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• v.37 no.2
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• pp.161-168
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• 2013

Nowadays, one of the most interested area of automobile industry is the production of vehicle which has collision safety and ability to produce less amount of $CO_2$. The achievement of such a dual performance is done by choosing the materials like dual phase steel, ferrite bainite steel, etc. These steels have been used in automotive chassis and body parts, and also used to be formed by hole flanging to meet the goal of strength and design requirement. The formability of sheet material was experimented by hole expansion test and the judgement relies on human eye and his experience. This manual judgement involves many errors and large deviation. This paper develops the automatic crack recognition system which finds a crack based on CCD image to complement the problem of the current method depending on human's sense.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.9
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• pp.663-668
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• 2016

Increasing fuel economy and reducing air pollution have been unavoidable issues in the development of new cars, and one of the important methods is decreasing vehicle weight. Weight can be reduced by using lightweight materials such as aluminum alloy. Dynamic stiffness analysis was performed and compared for different materials for the knuckle for a car. The dynamic stiffness of 6061 aluminum alloy was about 30% higher than that of FCD600 cast iron. Usually, materials that have high dynamic stiffness show excellent vibration resistance because the dynamic stiffness can affect the vibration characteristics. In order to design a lighter and more reliable chassis component using 6061 aluminum alloy (AA6061-T6), a new knuckle shape is suggested by adding section ribs to an existing knuckle model. The effect of each design change on the reliability and component weight was investigated using computer aided engineering (CAE).