P. Boscariol, F. De Bona, A. Gasparetto, L. Moro
Thermo-mechanical analysis of a fire door for naval applications
Proceedings of International CAE Conference 2013, 21-22 October 2013, Pacengo del Garda, Italy

Abstract: Fires doors are subjected to standard fire endurance tests in order to evaluate their fire resistance. The certification process of fire doors requires to verify that the door satisfies specific requirements: as an example, the mean temperature on the surface which is not exposed to the fire should not exceed a defined value and the gap between the door leaf and frame should not allow flame transmission. A realistic simulation of the heating process is therefore needed during the design phase in order to reduce as much as possible the number of fire tests. The problem of defining a Finite Element model (FEM) of a fire door and of its supporting frame is then dealt with. Since the problem can be considered uncoupled, the temperature field resulting form the thermal analysis can be used as the input for a subsequent structural analysis. Two different types of thermal analysis are considered: a transient analysis and a steady state analysis. A non linear structural analysis follows to predict the displacement field which occurs at the end of the heating phase. The adopted model is here validated through a comparison with experiment confirming that the proposed approach can be a valid tool for the prediction of thermo-mechanical performances of a naval fire door. Moreover the effective evaluation of different design improvement strategies can be also achieved.

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