Tensile strength of pine and ash woods – experimental and numerical study
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abstract
The mechanical properties define the behaviour of the timber under external loads, resulting directly from the timber anisotropic and heterogeneity characteristics. Depending upon the type of applied load the failure can be tensile, shear or torsion. When load enter the plastic regime, the stress-strain relationship passes through a maximum called the tensile strength. The tensile strength of wood being constant above the fibre saturation point, it increases with decreasing moisture content below the fibre
saturation. This can be related to where the water is absorbed in the microstructure. Their study is of great interest allowing the rational use of different wood species for structural and building purposes.
Timber stmctures are a competitive solution when compared to steel and concrete stmctures,
showing features and advantages that overcome their competitors: weight/strength ratio, rapid
assembly, fire resistance and excellent performance in earthquake scenario, natural aesthetic
attractiveness, and ecological rationality which leads to sustainable construction. The main
goal of this experimental and numerical shidy was to evaluate, using tensile tests, the
mechanical characteristics offrwo different wood species: Pine and Ash. For tensile test a total
of twelve samples for each wood species were prepared, six of them were cut in the wood
transverse to the grain, with dimensions equal to 190x50x9 mm, and the others six were cut in
the wood parallel to the grain with the dimensions equal to 210x40x9 mm. A numerical
simulation was also conducted in arder to assess the stress-strain behaviour of Pine and Ash
woods.
Timber structures are a competitive solution when compared to steel and concrete structures, showing features and advantages that overcome their competitors: weight/strength ratio, rapid assembly, fire resistance and excellent performance in earthquake scenario, natural aesthetic attractiveness, and ecological rationality which leads to sustainable construction. The main goal of this experimental and numerical study was to evaluate, using tensile tests, the mechanical characteristics of two different wood species: Pine and Ash. For tensile test a total of twelve samples for each wood species were prepared, six of them were cut in the wood transverse to the grain, with dimensions equal to 190×50×9 mm, and the others six were cut in the wood parallel to the grain with the dimensions equal to 210×40×9 mm. A numerical simulation was also conducted in order to assess the stress-strain behaviour of Pine and Ash woods.
