Some NONSAP Impact Simulations

In the design of casks for radioactive materials transportation, computer simulation plays an important role. Radiological shielding and thermal simulations are very well understood and using them it is posible, in some cases, to r each final design. On the other hand. impact cask simulations (e.g. 9 m free fall test) are not yet accepted and testing of models is currently requiered to achieve a final design. The main reason for this state is that there is not enough evidence that the existing impact codes can simulate the behaviour of a real cask. with complex geometry and different materials, under impact. The first impact analysis were of the kind energetic balance-dynamic pressure flow. Willd.ns and Guinan (1973) published an experimental and numerical study of impact of cylinders on a rigid boundary that can be used as a benchmark. More recently. and analysing this same cylinder impact problem, a study sponsored by the Japan Society of Mechanical Engineers by Yagawa et al. (1984) was published. with the purpose of identifying suitable techniques to analyze impact problems. Another paper by Key (1985) complements this study.