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Mecsol 2022 Webinar Series #4
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Mecsol 2022 Webinar Series #4

18 fev - 2022 • 14:00 > 16:00

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Descrição

This free webinar is part of Mecsol 2022's Webinar Series. Visit our website to see the list of all webinars.

GFRP profiles subjected to fire: from laboratorial test to multiphysics modelling

Prof. Carlos Manuel Tiago Tavares Fernandes, University of Lisbon

Glass Fibre Reinforced Polymers (GFRP) have several advantages over conventional building materials, namely in terms of strength, self-weight, insulation properties and durability. Although the mechanical and physical properties of pultruded GFRP profiles are reasonably studied, their response to fire is still an active topic of research. Even though flame retardants and phenolic resins have been proved to improve fire reaction properties significantly, in order to fulfill fire resistance requirements, there is a need to develop adequate fire protection systems to allow the use of GFRP profiles in buildings and other applications. Laboratory tests are the primary way of studying the problem, but their applicability is limited due to the high number of parameters involved in the study, such as the geometry of the profile, type of protection system (active or passive), number of exposed faces to fire, applied load, etc. 
In the present work, we develop a numerical model capable of accurately predicting the temperature distribution and the mechanical response of tubular section profiles made of GFRP, including the possibility of incorporating fire protection systems. Its main ingredients are:
(i) A thermal 2D model that predicts the temperature distribution inside the GFRP profile when exposed to fire in different scenarios, including conduction and natural convection of air and the internal radiation inside the cavity walls of the GFRP profile. The material decomposition is introduced by an Arrhenius equation. It is a non-linear, time-dependent coupled thermal/fluid dynamics/radiation problem;
(ii) The mechanical response of the GFRP profile is found by considering a geometrically exact large strains shells model with thickness variation, whose pure 3D constitutive model includes fiber orientation effects, thermal expansion, decomposition degree, and creep behaviour.


Chaired by Prof. Marco Lúcio Bittencourt - University of Campinas (Unicamp)
Termos e políticas

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Mecsol 2022 - 8th International Symposium on Solid Mechanics

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