Spin burst test of carbon-carbon composite disk

Yasuo Kogo*, Hiroshi Hatta, Hiroyuki Kawada, Takashi Shigemura, Hisaicui Ohnabe, Tomoaki Mizutani, Fumiki Tomioka

*この研究の対応する著者

研究成果: Article査読

10 被引用数 (Scopus)

抄録

In order to establish design criteria for a turbine disk made of Carbon-Carbon (C/C) composites. spin burst tests were performed on quasi-isotropically laminated C/C composite disks. Un-notched and notched flat disks were prepared to evaluate the effect of stress concentration on fracture behavior. Strain measurements during rotation tests revealed that deformation of the C/C composite disks with or without notches was in agreement with analytical or finite element calculations in the elastic region, which suggests that the test fixtures of the spin tester have a negligible effect on the deformation of C/C composite disks. In the spin burst tests, the un-notched C/C composite disks burst at an average rotation speed of 25000 r.p.m. with a peripheral velocity of 393 m/s. A comparison between the mean hoop stress averaged over the radius and the tensile strength of smooth specimen suggests that the burst of the un-notched C/C composite disks obey the mean stress criterion. On the other hand, the fracture toughness criterion was shown to be applied for the notehed specimen. The difference in the fracture criterion between the un-notched and the notched C/C composite disks is believed to correspond to that between the double edge notched specimens and specimens with a hole in the static tensile tests, (which was explained by the difference in the magnitude of the damaged zone where the stress concentrations would be relaxed).

本文言語English
ページ(範囲)1016-1035
ページ数20
ジャーナルJournal of Composite Materials
32
11
DOI
出版ステータスPublished - 1998 1 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料力学
  • 機械工学
  • 材料化学

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