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최성규(Seong-Kyu Choi),박정수(Jung-Su Park),이응소(Eung-So Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Rupture Disc is a typical safety device for industrial pressure vessels under high pressure and its size varies by each purpose. The rupture disc which is used for the airbag inflator has very small diameter such as 10mm. Therefore, it is very difficult to predict the burst pressure of rupture disc by structural analysis. It is necessary to do the dynamic analysis rather than static analysis because the time from impact of the automobile to full airbag deployment is approximately 30msec. But, the dynamic explicit analysis has disadvantage such as timestep limit caused by the small element size. Therefore, the dynamic implicit analyses were performed to predict the burst pressure of rupture disc more efficiently. In this research, the burst pressure was predicted not only by dynamic explicit analysis but also by dynamic implicit analysis on the rupture disc using LS-DYNA. Consequently, dynamic implicit analysis is more efficient and faster than explicit in case of relatively small-sized objects such as rupture disc used in the airbag inflator. Also, we have compared the experimental results with the numerical to identify their accuracy and correlation.