Title
Fracture criterion for bridging fibers in titanium metal matrix composites at elevated temperature
Document Type
Conference Proceeding
Date of Original Version
12-1-1994
Abstract
In this paper, a fracture criterion for bridging fibers in titanium metal matrix composites at elevated temperature is proposed. This criterion is based on the notion that in a composite subjected to cyclic loading, a competition exists between the evolving axial stress of a bridging fiber and its continuously decreasing fatigue strength. The stress build-up in the bridging fiber during fatigue crack growth of SM1240/Timetal-21S composite under different temperatures and loading frequencies is simulated using the finite element method. The life of bridging fibers was estimated from the knowledge of the fatigue crack growth behavior of the composite subjected to loading conditions similar to those used in the numerical simulation. Effects of the process-induced residual stress, test temperature and loading frequency were included in this simulation. Results of the study show that the build-up of the fiber stress is a time-dependent process while the degradation of the bridging fiber strength is both temperature and loading frequency dependent.
Publication Title, e.g., Journal
American Society of Mechanical Engineers, Materials Division (Publication) MD
Volume
51
Citation/Publisher Attribution
Tamin, M. N., and H. Ghonem. "Fracture criterion for bridging fibers in titanium metal matrix composites at elevated temperature." American Society of Mechanical Engineers, Materials Division (Publication) MD 51, (1994): 51-55. https://digitalcommons.uri.edu/mcise_facpubs/377