Chapter 38. In Sztu Observation of Stable Crack Propagation in Senb Specimens for R-Curve Evaluation

  1. Don Bray
  1. Kyoji Hiramatsu1,
  2. Akira Okada1 and
  3. Hatsuhiko Usami2

Published Online: 23 MAR 2010

DOI: 10.1002/9780470294499.ch38

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

How to Cite

Hiramatsu, K., Okada, A. and Usami, H. (1998) In Sztu Observation of Stable Crack Propagation in Senb Specimens for R-Curve Evaluation, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294499.ch38

Author Information

  1. 1

    Japan Fine Ceramics Center, Atsuta-ku, Nagoya 456, Japan

  2. 2

    Meijo University, Tempaku-ku, Nagoya 468, Japan

Publication History

  1. Published Online: 23 MAR 2010
  2. Published Print: 1 JAN 1998

ISBN Information

Print ISBN: 9780470375594

Online ISBN: 9780470294499

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Keywords:

  • separation;
  • resources;
  • recycling;
  • legislation;
  • demonstrations

Summary

An experimental setup for single-edge notched beam (SENB) specimens was designed to achieve stable fracture. In situobservation of crack propagation was realized by an optical microscope, focusing on the side surface of specimens. Stable crack propagation was successfully conducted and R-curves were directly calculated from the crack length and loads. The R-curves were obtained for toughened ceramics such as silicon nitride, silicon carbide whisker reinforced ceramics and MoB-Ni cermet. The R-curve behavior was compared with those determined by other evaluation methods such as a compliance method and an indentation-strength method. The R-curves, directly calculated from the crack length and loads, are discussed in terms of crack path geometry.