Damage evolution in hybrid ceramic matrix composites

Authors

Douglas R. Carroll, Missouri University of Science and TechnologyFollow
L. R. Dharani
John E. Goethe, Missouri University of Science and TechnologyFollow
Steven B. Haug
Weiping Cai
Mark A. Hall

Abstract

An experimental characterization was conducted of the damage evolution in whisker reinforced, fiber reinforced, and hybrid ceramic matrix composites. Highly polished specimens were loaded in increments of 10 MPa, and with each increment were carefully examined with a microscope. Acoustic emission was used to detect the onset of microcracking and it was possible to show the microcracking damage in the composite associated with the acoustic emissions event. As the load was increased, the average distance between microcracks decreased, making more microcracks per mm along the length of the specimen. The fiber reinforced and hybrid samples showed considerable toughness beyond the microcracking stress level. The purpose of this paper is to show how the damage evolves as a function of the applied load and the acoustic emission events.

Document Type

Article

Publication Date

9-1-1995

Recommended Citation

Carroll, Douglas R., L. R. Dharani, John E. Goethe, Steven B. Haug, Weiping Cai, and Mark A. Hall. "Damage evolution in hybrid ceramic matrix composites." In Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures—B: Ceramic Engineering and Science Proceedings, pp. 949-956. Hoboken, NJ, USA: John Wiley & Sons, Inc., 1995.

Journal Title

Ceramic Engineering and Science Proceedings