Finite element modelling of fire degraded FRP composite panels using a rate dependent constitutive model

Structural integrity of polymer matrix composite panels in fire

“…But, the precise sequences of such phenomena remain to be analyzed in future studies. By the comparison of the results of the slender panel with the stubby panel, Ramroth et al (2006) were able to conclude that micro-buckling may not be the primary mechanism that contributes to the onset failure of the structural panel, i.e. the panel with large in-plane dimensions.…”

“…Recent analytical and experimental works (e.g. Asaro and Dao, 1997;Asaro et al, 1999Asaro et al, , 2005Asaro et al, , 2009bBirman et al, 2006;Dao and Asaro 1999;Feih et al, 2007aFeih et al, , 2007bFeih et al, , 2010Gu and Asaro, 2005;Ramroth et al, 2006) treated thermal softening as well as the phase transition in chemical decomposition as the major influences on the mechanical properties of polymer matrix composites under fire damage. In the analytical simulation using the ratedependent micromechanical constitutive model (Ramroth et al, 2006) and the experimental evaluation Dao and Asaro 1999), it was found that rate dependence and plastic deformation were unlikely to be the mechanisms for failure of structure-size panels under considered fire protection time.…”

“…A constitutive model, based on crystal plasticity theory (Asaro, 1983), was proposed for polymer matrix composites that experience both temperature rise resulting from fire exposure and strain rate dependence via interlaminar slip Ramroth et al 2006). The constitutive model was implemented in finite element simulations to capture the plastic microbuckling phenomena.…”

“…In Ramroth et al (2006), the constitutive model was used to simulate the failure of the single-skin panel discussed in Section 4.4. The panel was slender, not stubby, so that it was inherently prone to global buckling.…”

Modeling of Coupled Temperature-Displacement-Diffusion Problem for Silica-Phenolic Composite under High Temperature

“…The thermal response and mechanical response were successively presented when carbon-phenolic composite was rapidly heated to high temperature. Recently, the high temperature behavior and the fire response of fiber reinforced polymer (FRP) composites under load in fire were studied [8][9][10][11][12][13][14][15] In this paper, the thermomechanical response of silica-phenolic composite with a constant radiant heat flux was presented. The heat-mass transfer process and the thermochemical decomposition were considered in the proposed model, which is important for further predicting the properties of the material in complex service environment.…”