Variation in Mechanical Properties within Individual Annual Rings in the Resonance Spruce Wood (Picea abies (L.) Karst.)

Moliński, W.; Roszyk, Edward; Puszyński, Jakub

doi:10.5552/drind.2014.1340

Cited by 3 publications

(9 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Roszyk et al [29] reported that latewood modulus of elasticity (MOE) is higher than earlywood MOE for scots pine at low moisture content (8%). Similar results were obtained for Spruce wood [Picea abies (L.) Karst] [31] and loblolly pine [28][29][30][31][32] with an important increase in MOE values with the growth of annual rings. However, the preparation of initial and final wood samples was quite complicated and required perfectly parallel annual rings.…”

Section: Practical Implicationssupporting

confidence: 75%

“…This method was used to determine earlywood and latewood properties in order to obtain a more detailed characterization of wood mechanical behavior. Only a few studies have investigated earlywood and latewood elastic properties [28][29][30][31][32]. Roszyk et al [29] reported that latewood modulus of elasticity (MOE) is higher than earlywood MOE for scots pine at low moisture content (8%).…”

Section: Practical Implicationsmentioning

confidence: 99%

See 1 more Smart Citation

Intra-Ring Wood Density and Dynamic Modulus of Elasticity Profiles for Black Spruce and Jack Pine from X-Ray Densitometry and Ultrasonic Wave Velocity Measurement

Kharrat

Koubaa

Khlif

et al. 2019

Forests

View full text Add to dashboard Cite

Currently, ultrasonic measurement is a widely used nondestructive approach to determine wood elastic properties, including the dynamic modulus of elasticity (DMOE). DMOE is determined based on wood density and ultrasonic wave velocity measurement. The use of wood average density to estimate DMOE introduces significant imprecision: Density varies due to intra-tree and intra-ring differences and differing silvicultural treatments. To ensure accurate DMOE assessment, we developed a prototype device to measure ultrasonic wave velocity with the same resolution as that provided by the X-ray densitometer for measuring wood density. A nondestructive method based on X-ray densitometry and the developed prototype was applied to determine radial and intra-ring wood DMOE profiles. This method provides accurate information on wood mechanical properties and their sources of variation. High-order polynomials were used to model intra-ring wood density and DMOE profiles in black spruce and jack pine wood. The transition from earlywood to latewood was defined as the inflection point. High and highly significant correlations were obtained between predicted and measured wood density and DMOE. An examination of the correlations between wood radial growth, density, and DMOE revealed close correlations between density and DMOE in rings, earlywood, and latewood

show abstract

Section: Practical Implicationssupporting

confidence: 75%

Section: Practical Implicationsmentioning

confidence: 99%

Intra-Ring Wood Density and Dynamic Modulus of Elasticity Profiles for Black Spruce and Jack Pine from X-Ray Densitometry and Ultrasonic Wave Velocity Measurement

Kharrat

Koubaa

Khlif

et al. 2019

Forests

View full text Add to dashboard Cite

show abstract

“…As a result, resonance wood is characterized by a small average MFA of 10 or less. Moreover, research has showed that a small difference between the average MFA of latewood compared to earlywood is beneficial for the acoustic properties, as this leads to a more homogeneous sound velocity ( [11,12]). A certain degree of continuity of this quantity over the violin plate is therefore desired.…”

Section: Wood Variabilitymentioning

confidence: 99%

“…Fact is that Norway spruce (Picea abiens) has a very small average MFA with respect to other wood species, to which it largely owes its preferred use in violin building. The MFA is known to decrease with the age of the growth ring, and also with tree height [11]. The decrease rate is however subject to uncertainty.…”

Section: Spatial Variabilitymentioning

confidence: 99%

“…dxdy (11) In this expression, the coefficients of the polynomial model are given a spatial character. Previous research [21] indicated that for low order polynomials applied to plate based models, these coefficient fields exhibit a high degree of continuity, because of the correlated behaviour of the eigenfrequencies with respect to changing density in different points on the plate.…”

Section: Propagationmentioning

confidence: 99%

See 1 more Smart Citation

Modelling of Material Parameter Uncertainty of Resonance Wood Used in Violins Using the Interval Field

Imholz¹,

Vandepitte²,

Moens³

2017

Proceedings of the 2nd International Conference on Uncertainty Quantification in Computational Sciences and Engineering (UNCECO

View full text Add to dashboard Cite

Abstract. The interval field method can be used to model spatial uncertainty in finite element models. When analysing spatial uncertainty, dependency is an important quantity to consider, as it is physically implausible to assume a quantity is independent in locations that are close to each other. The interval field method was introduced to join this concept of dependency with classical interval analysis, omitting the need to define probability distributions. This paper will apply the theory of interval field (IF) to the dynamical properties of a violin top plate, with uncertain stiffness and density.

show abstract

Evaluation of the Surface Irregularities of the Cross-Section of the Wood after CO2 Laser Cutting

Adamčík,

Igaz,

Štefančin

et al. 2023

Materials

View full text Add to dashboard Cite

The present paper deals with the analysis of cross-section surface irregularities after CO2 laser cutting. The surface irregularities of beech (Fagus sylvatica L.), oak (Quercus petraea), and spruce (Picea abies L.) wood were quantified by primary profile parameters using a digital microscope. The arithmetic mean height (Pa), used as the basic parameter, was supplemented by amplitude parameters (Pv, Pp, Pz) and the Psm parameter, through which the shape of the irregularity was specified in more detail. A statistically significant change was demonstrated when changing the values of the feed speed and the power of the CO2 laser. The results of this article confirm that the surface irregularities increased with an increasing laser power and decreasing feed rate. The scanned topographic images also provide a more detailed explanation of the measured P-parameters and point out the risks associated with the evaluation of the cross-section with the primary profile.

show abstract

Variation in Mechanical Properties within Individual Annual Rings in the Resonance Spruce Wood (Picea abies (L.) Karst.)

Cited by 3 publications

References 23 publications

Intra-Ring Wood Density and Dynamic Modulus of Elasticity Profiles for Black Spruce and Jack Pine from X-Ray Densitometry and Ultrasonic Wave Velocity Measurement

Intra-Ring Wood Density and Dynamic Modulus of Elasticity Profiles for Black Spruce and Jack Pine from X-Ray Densitometry and Ultrasonic Wave Velocity Measurement

Modelling of Material Parameter Uncertainty of Resonance Wood Used in Violins Using the Interval Field

Evaluation of the Surface Irregularities of the Cross-Section of the Wood after CO2 Laser Cutting

Contact Info

Product

Resources

About