SEDL / STP / STP1157-EB / STP15340S

Fatigue Test Methodology and Results for Ceramic Matrix Composites at Room and Elevated Temperatures

Butkus, LM
Captain, U.S. Air Force, and materials research engineer, Wright Research and Development Center, Wright-Patterson Air Force Base, OH

Zawada, LP
Captain, U.S. Air Force, and materials research engineer, Wright Research and Development Center, Wright-Patterson Air Force Base, OH

Hartman, GA
Research engineer, University of Dayton Research Institute, Dayton, OH

Pages: 17    Published: Jan 1992

Download this paper for $25 PDF (420K)          View License Agreement
Abstract

This paper discusses experimental methods and test results from a program designed to evaluate the mechanical response of glass and ceramic matrix composite (CMC) materials exposed to monotonic and cyclic mechanical loads at various temperatures. Experimental techniques discussed include specimen design, gripping and alignment, heating method, temperature measurement, and displacement measurement. Test results discussed include the relationship between mechanical response under monotonic loading and failure under cycling load. Of particular interest in these relationships are the matrix micro-cracking level, long-life (>10⁶ cycles) maximum cyclic stress, loss of modulus during cyclic loading tests, and the influence of temperature and environment.