Paper number 148

MONOTONIC AND FATIGUE LOADING BEHAVIOR OF A 2-D WOVEN CERAMICS MATRIX COMPOSITE AT ROOM AND ELEVATED TEMPERATURES

M. Al-Hussien¹, S. Mall² and J. R. Calcaterra³

1 Department of Aeronautics and Astronautics, Former Graduate Student, Air Force Institute of Technology, Wright-Patterson Air Force Base
2 Materials and Manufacturing Directorate, Air Force Research Laboratory
3 Former Post-Doctoral Research Associate
AFIT/ENY, 2950 P. St. Bldg. 640, Wright-Patterson Air Force Base , OH, 45433, USA

Summary

This study characterized a woven fabric reinforced ceramic matrix composite under monotonic and fatigue loading conditions at room and elevated temperatures in order: (1) to investigate monotonic tensile and compressive loading behavior at room and elevated (760(C) temperatures, (2) to establish the fatigue life diagrams (S-N curves) under tension-tension and tension-compression, low frequency (0.1Hz) loading conditions at room and elevated temperatures, and (3) to investigate damage mechanisms and failure modes under monotonic and fatigue loading conditions. The tested CMC had higher fatigue life in tension-tension cycling loading condition than in tension-compression cycling loading condition at a given maximum stress level at room temperature. However, it had the same fatigue life at the elevated temperature at a given stress level under tension-tension and tension-compression fatigue loading conditions.

Keywords

ceramics matrix composites, 2-D woven, monotonic loading, fatigue loading, tension, compression, room and elevated temperatures.