Ultrasonic waves propagation velocity and dynamic modulus of elasticity of European oak, European aspen, American cherry and wenge wood
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2016, Vol 93, Issue
Abstract
Ultrasonic waves propagation velocity and dynamic modulus of elasticity of European oak, European aspen, American cherry and wenge wood. In this work the propagation velocity of longitudinal ultrasonic waves and dynamic modulus of elasticity of selected species of hardwood of various anatomical structure and density were determined. The highest values of longitudinal ultrasonic waves velocity parallel and perpendicular to the grain and the dynamic modulus of elasticity parallel and perpendicular to the grain were noted for wenge, which is also characterised with the highest density. The properties tested perpendicular to the grain do not show such significant differences between wood species as parallel to the grain. The anisotropy of ultrasonic waves velocity is affected mostly by the type of wood structure, and thus its anatomic structure, and the anisotropy of the dynamic modulus of elasticity is affected mostly by wood density.
Authors and Affiliations
Agnieszka Kurowska, Paweł Kozakiewicz, Tomasz Gładzikowski
Preferences of senior users concerning construction and design of bedroom furniture
Preferences of senior users concerning construction and design of bedroom furniture. The number of elderly citizens has been growing rapidly in contemporary societies. This previously neglected group of consumers aged 60...
On automated deformation measurements of timber-concrete structures
On automated deformation measurements of timber-concrete structures. For many years a dynamic development of timber structures has been observed. This fact can be explained by many factors, among others, by the developme...
Poplar wood (Populus tremula L.) findings of finger - jointed timber
Poplar wood (Populus tremula L.) findings of finger-jointed timber. Poplar wood can be classified into strength classes C14- C40 from the construction timber quality point of view. Due to the lack of a spruce constructio...
The investigations on colour and gloss of lacquer coatings on impregnated pine wood
The study presents results of the thermal aging of lacquer coatings formed on impregnated pine wood with the Pinadur® system under the conditions of the test container procedure. The appearance, colour and gloss unit of...
Spoil Heaps - Influence of Ash and Bulk Weight
Lignite surface mining is, and for a long time will remain, one of the important energy sources within Czech economy. This fact is supported also by the worldwide trend of increase of prices for all fossil fuels, includi...