Reliable Ceramic Structural Composites Designed with Threshold Strength
Abstract
A stress intensity (K) function describing the extension of a crack through bounding compressive layers has been experimentally verified using two methods. For one method the crack length was measured using a replicating technique; in the other, the crack length was continuously measured in-situ with an optical microscope during loading. In both, cracks were observed to propagate in a stable, nearly straight path across the compressive layer with increasing applied stress. Catastrophic failure was observed when the crack fully extended across the compressive layers at an applied stress predicted and described as the threshold stress. This behavior and agreement was only valid when either the compressive stress and/or thickness of the compressive layer were small.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 30, 2001
- Accession Number
- ADA386812
Entities
People
- F. F. Lange
- J. Roedel
- M. P. Rao
Organizations
- University of California, Santa Barbara