Computational analysis of resisting marine FRP divisions exposed to fire. Application to the analysis of ship structures.

In this paper a numerical model for thermo-mechanical analysis of laminated composite structures under fire exposure is presented. The analysis is solved using a decoupled approach where temperature modifies the mechanical properties of the constituent materials. The thermal model is based on the research by Henderson et al. [1, 2], which takes into account the energy transfer processes of heat conduction, pyrolysis of the polymer resin and diffusion of decomposed gases. The mechanical model is based on finite element shell elements [3] and the laminated constitutive model is based on damage theory [4, 5, 6] and the serial-parallel rules of mixtures by Rastellini et al. [7], both have been adaptedto introduce the thermal expansion effect and thermal degradation of mechanical properties similar as described by Mouritz [8, 9, 10, 11] and Gibson [12, 13, 14, 15]. The boundary conditions introduced in the thermal model are obtained from a fire dynamics simulation (FDS) [16]. Finally, an application case of a fire collapse analysis of a structure exposed to a fire scenario is presented, the latter specifically demonstrates how the structural integrity of divisions of large-length composite vessels evolves under fire load.This work was funded thanks to H2020 project FIBRESHIP sponsored by the EUROPEAN COM- MISSION under the grant agreement 723360 ”Engineering, production and life-cycle management for complete construction of large-length FIBRE-based SHIPs”. www.fibreship.eu/about And part of the research project NICESHIP sponsored by the Spanish Ministry of Science and Inno- vation under Grant RTI2018-094744-B-C21.Peer ReviewedObjectius de Desenvolupament Sostenible::13 - Acció per al ClimaObjectius de Desenvolupament Sostenible::9 - Indústria, Innovació i InfraestructuraPostprint (published version