IDENTIFICATION OF DIFFUSE BIFURCATION MODES IN PLANE-STRAIN SAND SPECIMENS

• YAMAKAWA Yuki

  東北大学　大学院工学研究科土木工学専攻

• IKEDA Kiyohiro

  東北大学　大学院工学研究科土木工学専攻

• TAMURA Takashi

  東北大学大学院工学研究科土木工学専攻（現在：東海旅客鉄道株式会社）

Bibliographic Information

Other Title

• 砂の平面ひずみ供試体における拡散型分岐モードの抽出

Abstract

  This paper proposes a method to detect diffuse-mode bifurcations, which engender localization of deformation with characteristic geometrical patterns in plane-strain sand specimens. The scalar fields of a strain invariant in a two-dimensional domain observed in the specimens are expanded into a double Fourier series, and the Fourier spectra are examined. The methodology proposed is twofold: (1) examination of the spectral intensity to identify the wave number, which corresponds to a possible diffuse bifurcation mode, and (2) investigation of symmetry-breaking process of the deformation via diffuse-mode bifurcations. The proposed method is validated through an application to experimental and numerical results of plane-strain compression test, in which localized deformation and formation of shear bands were observed.

Journal

• Doboku Gakkai Ronbunshuu C

  Doboku Gakkai Ronbunshuu C 66 (4), 671-683, 2010

  Japan Society of Civil Engineers

Keywords

• ALERT experimental database
• diffuse mode bifurcation
• image analysis
• double Fourier series
• plane strain sand specimen
• shear band
• strain localization

Details

• CRID: 1390001205254058496
• NII Article ID: 130004468420
• DOI: 10.2208/jscejc.66.671
• ISSN: 1880604X
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed