「2タイプの実験法によるき裂発生評価手法の一提案 構造用集成材木材を対象としたモードI破壊靱性性能の評価方法に関する考察 その3」に対する討論:(神戸 渡,弘末幹明,中込忠男,板垣直行,飯島泰男著 日本建築学会構造系論文集,第76巻,第666号,1461-1468,2011年8月号掲載)  [in Japanese] DISCUSSION ON RESEARCH ACTIVITY PUBLISHED AS “A PROPOSAL OF ESTIMATION METHOD FOR CRACK INITIATION BY TWO TYPE TESTS A discussion about evaluation method of mode I fracture toughness performance with wood for structural glulam Part 3”:(Wataru KAMBE, Motoaki HIROSUE, Tadao NAKAGOMI, Naoyuki ITAGAKI and Yasuo IIJIMA, J. Struct. Constr. Eng., AIJ, Vol.76, No.666, 1461-1468, Aug., 2011)  [in Japanese]

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Author(s)

    • 桑村 仁 KUWAMURA Hitoshi
    • 東京大学大学院工学系研究科建築学専攻 教授・Ph. D. Prof., Dept. of Architecture, School of Engineering, The University of Tokyo, Ph. D.

Abstract

Experimental achievements on the fracture toughness of wood constituting glulam in the above paper are discussed about the following items: 1) The approach based on fracture mechanics for predicting the fracture strength of wood and wood joint has some serious defects. 2) The description of ductile-like fracture seems inadequate and the <i>J</i>-integral at the maximum load point is doubtful as the fracture toughness for crack initiation, because the tensile softening in the load-displacement curve of wood in 3PB and CT tests is caused by multiple steps of intermittent cracking.

Journal

  • Journal of Structural and Construction Engineering (Transactions of AIJ)

    Journal of Structural and Construction Engineering (Transactions of AIJ) 77(676), 995-996, 2012

    Architectural Institute of Japan

Codes

  • NII Article ID (NAID)
    130004508192
  • Text Lang
    JPN
  • ISSN
    1340-4202
  • Data Source
    J-STAGE 
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