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fibre-reinforced composites subjected to fire. ECCM 16, Sevilla, 25th June 2014 [email protected]. Renaud Gutkin, Hans Olsen, Per Blomqvist ...
Modelling the structural response of fibre-reinforced composites subjected to fire Renaud Gutkin, Hans Olsen, Per Blomqvist [email protected]

ECCM 16, Sevilla, 25th June 2014

Motivations

Fire Simulation Workflow Fire dynamic smulation

Heat Transfer

Mechanical response

FILM

© SP

© Swerea

Outline

The materials Thermal analysis Validation thermal model Mechanical analysis Validation mechanical model Conclusions

The materials

FIRE RESIST materials Long fibre Non crimp fabrics

Carbon fibre

Short fibres

Glass fibre

phenolic epoxy PA6 resin Furane

So modelling at which scale? Constituents

Ply

Laminate

Outline

The materials Thermal analysis Validation thermal model Mechanical analysis Validation mechanical model Conclusions

Thermal analysis

Heat Transfer

Heat generated during pyrolysis

Henderson & Wiecek (1987)

So modelling at which scale? Constituents

Ply

Laminate

Heat Transfer: properties

Mass loss Conductivity Heat capacity Density

Henderson & Wiecek (1987)

So modelling at which scale? Constituents

Ply

Laminate

Heat transfer equation with micromechanics

Density Heat capacity Conductivity Mass loss

;

Heat transfer equation: effect of degradation and temperature Residual Resin Content

Can be applied to fibres too

Resin conductivity Resin specific heat

Both can be temperature dependent if measured

Outline

The materials Thermal analysis Validation thermal model Mechanical analysis Validation mechanical model Conclusions

Validation thermal model

Finite element model Case 1: short fibres + furane Modelling at ply level 4 mm thick laminate

280 mm

Convection and radiation @ 25˚C

Case 2: long fibres + PA6 Modelling at constituents level 9 mm thick laminate

FDS input

Results thermal analysis Temperature

Furane + short glass fibres

Resin residual content

Results thermal analysis

Furane + short glass fibres

Results thermal analysis

Comfil-G

Outline

The materials Thermal analysis Validation thermal model Mechanical analysis Validation mechanical model Conclusions

Mechanical analysis

Mechanical analysis

with

Mechanical analysis

and

Mechanical analysis : effect of degradation and temperature

Gibson et al. (2012)

Outline

Thermal analysis Validation thermal model Mechanical analysis Validation mechanical model Conclusions

Validation mechanical model

Finite element model Case 1: short fibres + furane Modelling at ply level 4 mm thick laminate

Case 2: long fibres + PA6

280 mm 12.8 kg Dead weight

Modelling at constituents level 9 mm thick laminate

Supports

Results mechanical analysis

Furane + short glass fibres

Results mechanical analysis

Comfil-G

Conclusions

• Versatile model developed • Adapted to structural calculation • Further developments to account for viscous and creep effects • Further validation on middle scale structures and on CFRP

Acknowledgements

• • • •

FP7 program Antti Paajanen Erik Marklund Spyros Tsampas

Thank you! Questions We work on scientific ground to create industry benefit. www.swerea.se