Moisture content during and after high- and normal-temperature drying processes of wood

Barański, Jacek

doi:10.1080/07373937.2017.1355319

Cited by 21 publications

(8 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fourth batch of samples was dried in the experimental kiln developed at the Gdansk University of Technology (GUT). The technical details regarding that innovative process are presented in the work of Baranski [ 42 ]. The method uses heated steam as a drying medium and resulting materials are considered as a hybrid thermally treated wood.…”

Section: Methodsmentioning

confidence: 99%

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

et al. 2020

View full text Add to dashboard Cite

The modern wood converting processes consists of several stages and material drying belongs to the most influencing future performances of products. The procedure of drying wood is usually realized between subsequent sawing operations, affecting significantly cutting conditions and general properties of material. An alternative methodology for determination of mechanical properties (fracture toughness and shear yield stress) based on cutting process analysis is presented here. Two wood species (pine and beech) representing soft and hard woods were investigated with respect to four diverse drying methods used in industry. Fracture toughness and shear yield stress were determined directly from the cutting power signal that was recorded while frame sawing. An original procedure for compensation of the wood density variation is proposed to generalize mechanical properties of wood and allow direct comparison between species and drying methods. Noticeable differences of fracture toughness and shear yield stress values were found among all drying techniques and for both species, but only for beech wood the differences were statistically significant. These observations provide a new highlight on the understanding of the effect of thermo-hydro modification of wood on mechanical performance of structures. It can be also highly useful to optimize woodworking machines by properly adjusting cutting power requirements.

show abstract

Section: Methodsmentioning

confidence: 99%

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The drying medium parameters inside the kiln were measured using an E+E Elektronik EE31 humidity/temperature transmitter (E+E Elektronik Ges.m.b.H, Engerwitzdorf, Austria) with accuracies of 1.3% for humidity and 0.2 °C for temperature. The drying process was organized by the control system in two-stage process (Baranski 2018;Klement et al 2019).…”

Section: Methodsmentioning

confidence: 99%

“…Intermediate and final kiln conditions can be modified to speed drying without fear of internal defects. To relieve residual stresses at the end of drying process and thus avoiding distortion when material is re-sawed or machined to an asymmetric pattern, the final conditioning treatments must be used (Barański et al 2017;Baranski 2018;Klement et al 2019). On other hand, low quality of dried lumber not only affects the wood's monetary value, but also affects several of its workability properties, including those of planing, shaping, turning, boring, mortising, and sanding (Gu et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Deformation and surface color changes of beech and oak wood lamellas resulting from the drying process

Barański

Konopka

Vilkovská

et al. 2020

BioRes

View full text Add to dashboard Cite

The drying process was examined relative to parameters’ influence on the deformation and surface layer color changes of beech wood (Fagus sylvatica L.) and oak wood (Quercus robur L.). The goal was to analyze the impact of drying process conditions, wood and growth rings types, and load on the deformation and surface color changes of drying thin wooden elements. A further aim was to reduce the time of the lamella drying and minimize wood products defects. During each drying, 40 pieces of wood were dried, divided into two groups. For the first group, 30 pieces were dried under a uniformly distributed load of approximately 50 kg, while for the second group, 10 samples were dried without weight. The lamellas dried under load exhibited fewer cup, bow, and twist deformations than the lamellas dried without load. Cracks in the dried lamellas occurred comparably in those dried under and without load. Color changes in the specimens before and after drying were observed and measured. The differences in colorimetric parameters (a, b, and L) between wood without defects and with defects were less marked after drying than before drying. The color changes were only noticed in the surface layers of the specimens.

show abstract

“…The MC of each wooden block is measured by the weighing method to form a matrix distribution. After slicing, the slicing position is filled with specimens of the same material to reduce the influence of water loss due to slicing [28][29][30]. MC curves are shown in Fig.…”

Section: Moisture Content and Distribution Detectionmentioning

confidence: 99%

Fine Characterization and Analysis of Drying Strain of the ELM Board via DIC Technology

Liu¹,

Zhu²,

Jin³

et al. 2023

Journal of Renewable Materials

View full text Add to dashboard Cite

In this paper, the occurrence and development mechanism of strain on the cross-section during the wood drying is explored. Therefore, strain regularity on the cross-section of 50 mm thickness elm (Ulmus rubra) board at the temperature of 40°C and 80°C is detected via digital image correlation technology. Hence, the difference between tangential and radial strain at surface and core layers was denoted. The results showed that strain distribution in the width direction of the board is uneven. Moreover, a large drying shrinkage strain occurs at the near-core layer, while the maximum strain difference reaches 4.08%. Hence, the surface of the board is cracked along the thickness direction. The radial strain of the board is higher than the tangential strain in the early stage of drying, while these strains are reversed in the later stage of drying. The temperature is related to the difference between the tangential and radial strains of the elm board. These differences at the core layer are larger than those of the surface layer. The conducted research results provide a theoretical basis for process optimization.

show abstract

Moisture content during and after high- and normal-temperature drying processes of wood

Cited by 21 publications

References 31 publications

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

Deformation and surface color changes of beech and oak wood lamellas resulting from the drying process

Fine Characterization and Analysis of Drying Strain of the ELM Board via DIC Technology

Contact Info

Product

Resources

About