Abstract
The aim of this study was to investigate the effect of loading rate on the micro-mechanical properties of oak (Quercus petraea) wood. Bending strength, modulus of elasticity in bending, compression strength parallel to the grain and tensile strength parallel to the grain were determined using microsized test samples. Three different loading rates were used for each test. The first loading rates were determined according to related ISO standards and the second and third loading rates were determined for half and a quarter of the standard loading rates. Results showed that the loading rate significantly affected the modulus of elasticity, tensile strength and compression strength of the oak wood, while the bending strength was not affected.
Highlights
The use of micro-sized samples to determine the mechanical properties of wood is gaining in importance
Modulus of elasticity in bending, tensile and compression strength, all multiple comparisons were first subjected to an analysis of variance (ANOVA) at p < 0,05
The following conclusions can be drawn: The effect of loading rate was statistically significant for the modulus of elasticity in bending, tensile strength and compression strength of oak wood
Summary
The use of micro-sized samples to determine the mechanical properties of wood is gaining in importance. To date, there is no standard method for employing micro-sized test samples. Micro-sized samples can be used to determine the mechanical properties of wood when obtaining standard-sized test samples is not possible. In order to avoid damaging wood material for further use in various applications, mechanical properties can be determined by using micro-sized test samples. With the development of micro-sized sample testing, strength losses due to time exposure can be determined for the structural applications of the wood. This information can provide a solid base for true assessment of the necessity of wooden structure renewal
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