High Temperatures In Parallel Or
Perpendicular Wood Grain Direction:
A Numerical And Experimental Study
Author(s)
E. M. M. Fonseca & L. M. S. Barreira
Abstract
The high vulnerability of wood due to accidental conditions requires a rigorous
thermal and mechanical assessment. In this work, an experimental and numerical
study will be presented to determine the char-layer evolution in pine wood crosssection,
submitted at high temperatures due to an anaerobic process. A non-linear
thermal and transient analysis will be conducted using the numerical program. A
thermal unit and electro ceramic resistances will be used during the experimental
program. The evolution of a char-layer by the orientation of different fibres will
be determined. The experimental results obtained with several wood samples
will be compared using a numerical program with a finite element formulation.
Keywords: pine wood, grain direction, char-layer, high temperatures,
experimental study, numerical study.
1 Introduction
Wood is a natural material and is submitted to many constantly changing
influences. Wood as a construction material presents many advantages due its
high strength and stiffness to height ratios [1]. The main advantages of timber
constructions, relative to the use of other materials, are: ease of construction and
maintenance, pleasant appearance, renewable resource, lightweight. The
combustion and the chemical phenomena, occurring in wood, during an
accidental situation at high temperatures, is a complex study issue. When wood
structures are exposed to high temperatures, the burned wood becomes a charlayer
which loses all strength, but it delays the rise in temperature in the core of
material. The speed at which charring depth advances in the material is called the
Keywords
pine wood, grain direction, char-layer, high temperatures,
experimental study, numerical study
Related Book
Other papers in this volume
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