Chapter 60. Shear Stress-Strain Behavior of Laminated Carbon/Carbon Composites with Variable Stacking Sequence

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Lars Denk1,
  2. Hiroshi Hatta2 and
  3. Satoshi Somiya1

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294628.ch60

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

How to Cite

Denk, L., Hatta, H. and Somiya, S. (2000) Shear Stress-Strain Behavior of Laminated Carbon/Carbon Composites with Variable Stacking Sequence, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294628.ch60

Author Information

  1. 1

    Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Kanagawa, Japan Tel: (81) 045-563-1141 (3133), Fax: (81)045-562-7625

  2. 2

    The Institute of Space and Astronautical Science, 3-1-1, Yoshinodai, Sagamihara, 229-8510, Kanagawa, Japan Tel (81) 427 59-8293, Fax (81) 427 59-8461

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375686

Online ISBN: 9780470294628

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Keywords:

  • ceramic matrix composite;
  • rocket engines;
  • mechanical properties;
  • pre-ceramic polymer infiltration;
  • damping

Summary

Notched specimens made of unidirectionally reinforced C/C composite show a completely notch insensitive behavior due to splitting crack formation emanating from the notches. Cross ply C/C composite, (0/90)n also exhibit a high degree of notch insensitive behavior which is believed to be, to some extent, brought by shear damage in form of a so-called “shear band”. Since unidirectionally reinforced C/C composites possess a lower shear strength than the cross ply C/Cs, shear band formation in the cross-ply can be expected to be accurately discussed by extrapolating intermediate material configurations between the two. In order to simulate such an increased notch insensitive behavior and to estimate the damage zone formation near the notches, basic shear material properties must be known. In this work, laminated C/Cs with different ratios of 0° and 90° layers were prepared and the shear stress-strain behavior was observed by use of Iosipescu type and ±45° tension tests. The peak shear stress was found to increase linearly up to a fraction of 0° layers of 50% followed by a decrease of the same rate as the fraction of 0° layers further increases. The ±45° tension test revealed a much lower fracture strain than the Iosipescu type tests. Thus the shear band extension might be larger than what could be expected from Iosipescu type data.