Thermal Fatigue Analysis of Metal Matrix Composite with Spherical Reinforcements
Abstract
The stresses and strains, induced by coefficient of thermal expansion (CTE) mismatch, are analyzed for a metal matrix composite with a spherical reinforcement particle. The spherical reinforcement particle is found to be in a hydrostatic stress state and remains in the elastic state. The stresses and strains are largest, and plastic deformation occurs in the matrix adjacent to the reinforcement particle. Accordingly, the reinforcement particle/matrix interface becomes a potential crack initiation site under thermal cycling. The critical internal pressure for plastic deformation is less than 2/3 of the yield stress of the matrix material and it decreases with increasing range of thermal cycle. From the analytically determined strains, the thermal fatigue life can be estimated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1991
- Accession Number
- ADA255313
Entities
People
- Eun U. Lee
Organizations
- Naval Air Warfare Center Warminster