Chapter 27. Fractal Analysis of a Multilayered Composite DCB Specimen

  1. J. P. Singh
  1. J. Cuneo1,
  2. Z. Chen1,
  3. J. J. Mecholsky Jr.1 and
  4. T. L. Jessen2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294437.ch27

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

How to Cite

Cuneo, J., Chen, Z., Mecholsky, J. J. and Jessen, T. L. (1997) Fractal Analysis of a Multilayered Composite DCB Specimen, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294437.ch27

Author Information

  1. 1

    Department of Materials Science and Engineering, University of Florida

  2. 2

    Naval Research Laboratory, Washington D. C.

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375495

Online ISBN: 9780470294437

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Keywords:

  • crackfront interactions;
  • particulate composites;
  • fractal analyses;
  • consisting of glass;
  • crack propagation

Summary

Previous research in particulate composites suggested that the overall toughness is dependent solely on the number of particle/crackfront interactions. A threshold number of interactions exist for each particle loading to achieve a steady-state toughness - interactions beyond this threshold limit do not enhance the overall toughness. The samples of this prior work were double cantilever beam (DCB) specimens consisting of glass and varied particulate-loaded composite layers arranged in various sequences. The present study analyzes the fracture surfaces of these specimens using fractographic and fractal analyses. The analysis of the fracture surface features showed a direct correlation between the fracture toughness of the specimen and the fractal dimension measurements in each layer of the composite. The results of this study imply that the fracture topography of the entire surface is determined by the local environment of the initial crack at the time of crack propagation.