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Indentation hardness and elastic recovery of some hardwood species
Názov Indentation hardness and elastic recovery of some hardwood species Aut.údaje Maciej Sydor ... [et al.] Autor Sydor Maciej (20%)
Spoluautori Pinkowski Grzegorz (20%)
Kučerka Martin 1980- (20%) UMBFP07 - Katedra techniky a technológií
Kminiak Richard (20%)
Antov Petar (10%)
Rogoziński Tomasz (10%)
Zdroj.dok. Applied Sciences. Vol. 12, č. 10 (2022), pp. [1-14]. - Basel : Multidisciplinary Digital Publishing Institute, 2022 Kľúč.slová drevo - wood stromy - trees drevársky priemysel Form.deskr. články - journal articles Jazyk dok. angličtina Krajina Švajčiarsko Anotácia The purpose of the study was to measure the Brinell hardness (HB) of six wood species and evaluate the ability to recover the depth of the imprint (self-re-deformation). Straight-grain clear samples of ash, beech, alder, birch, iroko, and linden wood were prepared. Measurements were made in the three main reference timber cross-sections: radial (R), tangential (T), and axial/longitudinal (L) and with two measuring loads of 30 kG and 100 kG (294.2 N and 980.7 N). The tested wood species could be classified into hard (ash, beech), medium-hard (alder, birch, iroko), and soft (linden) wood species. The HBs of each tested wood species differed in the cross-sections, i.e., side hardness (R, T) and end hardness (L). Higher HB values were obtained at 100 kG load in all species and all three cross-sections. The lowest influence of the measurement force value on the HB value was revealed for the soft wood species (linden: 107–118%). This influence was visible for the other five medium-hard and hard wood species, ranging from 125% to 176%. The percentage of temporary imprint in total imprint depth (x/H) varied from 12 to 33% (linden 12–18%—the lowest self-re-deformation ability; beech 25–33%—the highest self-re-deformation ability). The results of this study underline that the higher the density of the wood, the higher the Brinell hardness, and, simultaneously, the greater the measurement force used, the higher the Brinell hardness measured. The ability of self-re-deformation in wood’s R and T cross-sections depends on the wood density and the measuring force used. In contrast, this ability only depends on the wood density in the L cross-section. Those observations imply that the compaction of the cell structure during side compression is mainly non-destructive, while the longitudinal deformation of the cell structure (the buckling of cell walls and fracture of ends of the cells) is to a great degree destructive and irreversible. These results can be used in the construction and furniture sectors, especially when designing products and planning the woodworking of highly loaded wood floors and furniture elements. URL Link na plný text Kategória publikačnej činnosti ADC Číslo archívnej kópie 51834 Kategória ohlasu BAUFLEUR, Andressa Midori Yamauchi - STANGERLIN, Diego Martins - FERREIRA, Matheus Rafael - PARIZ, Elisangela - RODOLFO JUNIOR, Francisco - PAULA, Edgley Alves de Oliveira - DE MELO, Rafael Rodolfo. Effect of acetylation on technological characteristics of Jacaranda copaia wood : part 1 - physical and mechanical properties. In Nativa (Sinop). ISSN 2318-7670, 2022, vol. 10, no. 2, pp. 277-282.
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ŽIGON, Jure - STRAŽE, Aleš. Vpliv vlažnosti na mikrotrdoto smrekovine, določeno z vtiskanjem. In Les [online]. 2023, vol. 72, no. 1, pp. 5-16 [cit. 2023-09-06]. ISSN 2590-9932. Dostupné na: https://doi.org/10.26614/les-wood.2023.v72n01a01
KOCZAN, Grzegorz. Probing measurements of the Meyer hardness index of radial, tangential and cross section of various types of wood. In Annals of Warsaw university of life sciences SGGW : forestry and wood technology. ISSN 1898-5912, 2023, no. 121, pp. 21-27.
ATANASOV, Valentin - KOVATCHEV, Georgi - TODOROV, Tihomir. Study of the influence of basic process parameters on the roughness of surfaces during milling of scots pine wood. In Acta facultatis xylologiae Zvolen. ISSN 1336-3824, 2023, vol. 65, no. 2, pp. 89-98.
MILLANIYAGE, Kuluni - KOTLAREWSKI, Nathan - WALLIS, Louise - TAOUM, Assaad. Engineered flooring from low-density plantation hardwood : evaluation of long-term in-service trials. In Wood and fiber science. ISSN 0735-6161, 2024, vol. 56, no. 1, pp. 24-42.
DORWU, Frank Kofi - MENSAH, Prosper - ANTWI, Kwaku - DE MELO, Rafael Rodolfo - PIMENTA, Alexandre Santos - DE OLIVEIRA PAULA, Edgley Alves - RUSCH, Fernando. Influence of age and trunk positions on physicomechanical properties of Anthocleista grandiflora Gilg wood. In Materia - Rio de Janeiro. ISSN 1517-7076, 2024, vol. 29, no. 2, pp. 1-10.
KOVATCHEV, Georgi - ATANASOV, Valentin. Influence of tlie number of belts over vibrations of tlie cutting mechanism in woodworking shaper. In 11th hardwood conference proceedings, Sopron, 30th-31st May 2024 [online]. 1. vyd. Sopron : University of Sopron press, 2024, pp. 149-152 [cit. 2024-09-05]. ISBN 978-963-334-518-4. Dostupné na: https://doi.oig/10.35511/978-963-34-518-4
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