Chapter 35. Effect of Test Parameters on Tensile Mechanical Behaviour of a Continuous Fibre Ceramic Composite (CFCC)

  1. John B. Wachtman Jr
  1. J. P. Piccola Jr. and
  2. M. G. Jenkins

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314715.ch35

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

How to Cite

Piccola, J. P. and Jenkins, M. G. (1995) Effect of Test Parameters on Tensile Mechanical Behaviour of a Continuous Fibre Ceramic Composite (CFCC), in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314715.ch35

Author Information

  1. Department of Mechanical Engineering University of Washington Seattle, WA 98195

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375372

Online ISBN: 9780470314715

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Keywords:

  • fibre-reinforced;
  • clarify;
  • reliability;
  • catastrophic;
  • brittle

Summary

Although such national test standards for CFCCs as ASTM C1275-94 “Standard Practice for Monotonic Tensile Strength Testing of Continuous Fibre-Reinforced Advanced Ceramics with Solid Rectangular Cross-Sections at Ambient Temperatures” have helped clarify certain issues in testing CFCCs, the complete quantification of the effects of certain test parameters is still ongoing. In this study, the effects of test mode (load vs. displacement), test rate (fast vs. slow), specimen geometry (straight-sided vs. reduced-gage section), specimen volume (long/thin vs. short/fat), and bending in tension were evaluated for a 12-ply, 2-D, plain weave SiC fibre reinforced/CVI SiC matrix CFCC. Results show that ‘graceful failure’ is often accentuated by displacement control and strengths (and fracture strains) are not affected by test rates. For certain fibre architectures (e.g. 2-D plain weave) no strong tendency to more frequent non gage section failures was noted for straight-sided specimens. Type of specimen volume had some effect since long and thin specimens exposed larger volumes of individual fibres to maximum stresses than did short and thick specimens. The limited number of tests prevented definite conclusions on the effect of bending (e.g. >5%) although proportional limit stress showed a more pronounced sensitivity to bending that did ultimate tensile strength.