Effects of Delignifying Treatments on Mechano-sorptive Creep of Wood III. MS creep of longitudinal specimens

• Zhang Wenbo

  Faculty of Agriculture, Shinshu University

• Tokumoto Morihiko

  Faculty of Agriculture, Shinshu University

• Takeda Takashi

  Faculty of Agriculture, Shinshu University

• Yasue Koh

  Faculty of Agriculture, Shinshu University

Bibliographic Information

Other Title

• 木材のメカノソープティブクリープに及ぼす脱リグニン処理の影響（第３報）繊維方向のＭＳクリープ
• モクザイ ノ メカノソープティブクリープ ニ オヨボス ダツリグニン ショリ ノ エイキョウ ダイ3ポウ センイ ホウコウ ノ MS クリープ
• Effects of Delignifying Treatments on Mechano-sorptive Creep of Wood III.
• MS creep of longitudinal specimens
• 繊維方向のMSクリープ

Abstract

In the previous papers, it became clear that the effect of delignifying on mechano-sorptive (MS) creep of radial specimens was quantitatively remarkable, but was qualitatively slight. In this paper, we investigated the effects of delignifying treatments on MS creep of the longitudinal specimens and the obtained results were compared with the case of radial specimens.<br>The obtained results were summarized as follows :<br>1. During repeating Ad (loading only during adsorption) or Da (loading only during desorption) processes, total compliance (J_T) and set increased. Delignifying increased the amounts of J_T and set, while the differences in J_T and set between Ad and Da processes were small.<br>2. Delignifying increased J_T for AD (continuous loading) process : J_T of strongly delignified specimens was 1.7 times as greater than J_T of controls after five moisture cycles. While the deflections increased during each desorption, the deflections decreased remarkably during each adsorption except for the first one.<br>3. The effects of delignifying were more pronounced for radial specimens, where J_T of strongly delignified specimens was 5.4 times greater than J_T of controls (1.7 times greater for longitudinal specimen). The internal force presumably acts directly on the matrix of cell wall of radial specimens, while the combination of microfibril and matrix might reduce MS creep for longitudinal specimens.

Journal

• Mokuzai Gakkaishi

  Mokuzai Gakkaishi 52 (4), 206-214, 2006

  The Japan Wood Research Society

Keywords

• bending creep
• adsorption and desorption
• anisotropy
• set recovery
• superposition

Details

• CRID: 1390001206353257728
• NII Article ID: 10018204801
• NII Book ID: AN00240329
• DOI: 10.2488/jwrs.52.206
• ISSN: 18807577
• ISSN: 00214795
• NDL BIB ID: 8047546
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8047546
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed