Stanovení mechanických charakteristik kořenů

This bachelor deals with describing and assessmenting basic mechanical properties of woot-roots. Experimental determination of mechanical properties was carried out by the destructive method roots tensile stress on test machine. Test was carred out on three tree species. : Norway spruce (Picea abies (L.) Karsten), Black poplar (Populus nigra L.) and Silver birch (Betula pendula L.). In the first place designed suitable method for testing wood-root. The thesis furthure describes the process of obtaining and preparation of sample, procedures during the actual testing, statistical analysis, comparing with the literature and discuss the impact of factors on the results achieved. The results indicate a statistically significant difference between the modulus of elasticity of birch and data spruce and poplar, data tensile strength of birch and data of spruce and poplar, failure force of poplar and spruce, data relative deformation on tensile strength of all the data together, data toughness poplar and data spruce and birch. Statistically insignificant was impact diameter of the root in poplar and spruce on the elastic modulus and the same applies of tensile strength, further we failed to demonstrate the influence of the diameter of the chimney to deformation at the roots of spruce and birch