Compression characteristics of spheroidal graphite cast iron pipe members

T. Yamaguchi, Y. Kimura

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Spheroidal graphite cast iron can be made with shape freedom, and can be used often in critical parts of automobiles and industrial machinery that are designed using the allowable stress design method. However, spheroidal graphite cast iron has been regarded as having low ductility deriving from fracture. It has therefore never been used for structural members for construction purposes. Previous studies have not clarified the plastic deformation capacity and ultimate strength of the spheroidal graphite cast iron members, even though the material properties were estimated using many experimentally obtained results. As described in this paper, compression tests were performed to investigate the plastic behavior of the spherical graphite cast iron members, and to assess the relation between the collapse mechanism and the width-to-thickness ratio. Tensile strength of samples corresponded to 700 N/mm2, 450 N/mm2, and 400 N/mm2. In addition, steel pipe material corresponding to 490 N/mm2 was selected. Consequently, six specimens were used for the compression test. One was a steel pipe. The specimen diameters were 165.2 mm; the lengths were 450 mm, corresponding to approximately three times the diameter. The specimen thickness was 4 mm or 6 mm, with a width-to-thickness ratio of 41.3 or 27.5. The ultimate strength of spheroidal graphite cast iron pipe members is about twice the yield strength, even though the ultimate strength of the steel piles is equal to the yield strength. A crack was found on the pipe surface at the ultimate strength because the axial stress on the surface changes compression to tension by growing plate bending deformation of local buckling. Spheroidal graphite cast iron pipe members under compression loading exhibit brittle behavior after post local buckling.

本文言語English
ホスト出版物のタイトル2014 International Conference on High Performance and Optimum Design of Structures and Materials, HPSM 2014 which incorporated the Seminar on Optimum Design in Engineering, OPTI 2014
出版社WITPress
ページ455-463
ページ数9
ISBN(印刷版)9781845647742
DOI
出版ステータスPublished - 2014
イベントInternational Conference on High Performance and Optimum Design of Structures and Materials, HPSM/OPTI 2014 - Ostend, Belgium
継続期間: 2014 6 92014 6 11

出版物シリーズ

名前WIT Transactions on the Built Environment
137
ISSN(印刷版)1743-3509

Other

OtherInternational Conference on High Performance and Optimum Design of Structures and Materials, HPSM/OPTI 2014
国/地域Belgium
CityOstend
Period14/6/914/6/11

ASJC Scopus subject areas

  • 建築
  • 土木構造工学
  • 建築および建設
  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 人文科学(その他)
  • 輸送
  • 安全研究
  • コンピュータ サイエンスの応用

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