RT Journal Article
SR Electronic
A1 Kloiber, Michal
A1 Kotlínová, Mária
A1 Tippner, Jan
T1 Estimation of wood properties using pin pushing in method with various shapes of the penetration pin
JF Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
YR 2014
VO 57
IS 2
SP 53
OP 60
DO 10.11118/actaun200957020053
UL https://acta.mendelu.cz/artkey/acu-200902-0005.php
AB The existing penetration methods for the identification of the density of wood that forms a part of structures do not make it possible to describe the density in the entire element profile but only on its surface. However, wood density changes throughout the profile which affects the accuracy of the density determination. The instruments used until now based on the principle of a pin shot into the material thus needed to be supplemented with a test during which the pin would be pushed at least to the centre of the measured element. Pins of 3 mm in diameter were manufactured with a special jig fastening them to a universal testing machine. Using the testing machine, the force required to push the pin in was measured at a constant travel speed. It has been found out that the mechanical work needed for the pin penetration correlates very well with the wood density determined in the surroundings of the place where the pin was pushed in.