Rheological behavior in wood drying: Classification, characterization, and future perspectives.

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Title: Rheological behavior in wood drying: Classification, characterization, and future perspectives.
Authors: Fu, Zongying1 (AUTHOR), Lu, Yun1,2 (AUTHOR) y.lu@caf.ac.cn
Source: Drying Technology. 2026, Vol. 44 Issue 1, p116-130. 15p.
Subjects: Rheology, Lumber drying, Viscoelastic materials, Humidity, Applied sciences, Research methodology evaluation, Sustainability
Abstract: Wood drying is a critical stage in wood processing, as moisture migration under coupled thermal, humid, and mechanical fields induces complex rheological responses that ultimately determine product quality. These responses including drying shrinkage, elastic deformation, viscoelastic creep, and mechano-sorptive creep, which govern the initiation and evolution of drying-induced defects such as distortion and cracking. This review synthesizes current understanding of the classifications, controlling factors, and characterization methods of wood rheology during drying, and outlines key research needs. Moisture content, temperature, and cell-wall microstructure emerge as dominant factors: moisture alters shrinkage and stiffness by disrupting hydrogen bonding and polymer mobility, while temperature regulates viscoelastic and mechano-sorptive behavior through its effects on water transport and polymer relaxation. Regarding characterization techniques, traditional slicing methods provide basic strain measurements but suffer from limited accuracy, whereas modern non-contact methods, such as digital image correlation and near-infrared spectroscopy, offer high-resolution, full-field strain and moisture mapping. Modeling approaches grounded in rheological theory and finite element analysis support the prediction of drying stresses and deformation. Future efforts should prioritize multiscale mechanism elucidation, intelligent sensing technologies, and the development of greener, more efficient drying strategies to advance sustainable and digitalized wood processing. [ABSTRACT FROM AUTHOR]
Copyright of Drying Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 190574813
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  Data: Rheological behavior in wood drying: Classification, characterization, and future perspectives.
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  Data: <searchLink fieldCode="AR" term="%22Fu%2C+Zongying%22">Fu, Zongying</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Yun%22">Lu, Yun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> y.lu@caf.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Drying+Technology%22">Drying Technology</searchLink>. 2026, Vol. 44 Issue 1, p116-130. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br /><searchLink fieldCode="DE" term="%22Lumber+drying%22">Lumber drying</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelastic+materials%22">Viscoelastic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Humidity%22">Humidity</searchLink><br /><searchLink fieldCode="DE" term="%22Applied+sciences%22">Applied sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Research+methodology+evaluation%22">Research methodology evaluation</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainability%22">Sustainability</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Wood drying is a critical stage in wood processing, as moisture migration under coupled thermal, humid, and mechanical fields induces complex rheological responses that ultimately determine product quality. These responses including drying shrinkage, elastic deformation, viscoelastic creep, and mechano-sorptive creep, which govern the initiation and evolution of drying-induced defects such as distortion and cracking. This review synthesizes current understanding of the classifications, controlling factors, and characterization methods of wood rheology during drying, and outlines key research needs. Moisture content, temperature, and cell-wall microstructure emerge as dominant factors: moisture alters shrinkage and stiffness by disrupting hydrogen bonding and polymer mobility, while temperature regulates viscoelastic and mechano-sorptive behavior through its effects on water transport and polymer relaxation. Regarding characterization techniques, traditional slicing methods provide basic strain measurements but suffer from limited accuracy, whereas modern non-contact methods, such as digital image correlation and near-infrared spectroscopy, offer high-resolution, full-field strain and moisture mapping. Modeling approaches grounded in rheological theory and finite element analysis support the prediction of drying stresses and deformation. Future efforts should prioritize multiscale mechanism elucidation, intelligent sensing technologies, and the development of greener, more efficient drying strategies to advance sustainable and digitalized wood processing. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Drying Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1080/07373937.2025.2606236
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 116
    Subjects:
      – SubjectFull: Rheology
        Type: general
      – SubjectFull: Lumber drying
        Type: general
      – SubjectFull: Viscoelastic materials
        Type: general
      – SubjectFull: Humidity
        Type: general
      – SubjectFull: Applied sciences
        Type: general
      – SubjectFull: Research methodology evaluation
        Type: general
      – SubjectFull: Sustainability
        Type: general
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      – TitleFull: Rheological behavior in wood drying: Classification, characterization, and future perspectives.
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            NameFull: Fu, Zongying
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            NameFull: Lu, Yun
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            – D: 01
              M: 01
              Text: 2026
              Type: published
              Y: 2026
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              Value: 44
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            – TitleFull: Drying Technology
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