SYMPOSIA PAPER Published: 01 January 1996

Fatigue Behavior of [0] SCS-6/Ti-6Al-4V Composite Subjected to High Temperature Turboshaft Design Cycles


Mission cycle fatigue testing of a [0]8 SCS-6/Ti-6A1-4V composite was performed. The mission cycle simulates the stress-temperature-time profile in a ring-reinforced impeller of a turboshaft engine. The cycle has a fourteen minute period and attains a peak stress and temperature of 1100 MPa and 427‡C respectively. A fatigue life of 9,528 cycles was achieved. While this life was less than the design goal, 15,000 cycles, a moderate increase in fiber content coupled with a small decrease in peak stress or temperature would probably achieve the stated design goal.

Author Information

Aksoy, SZ
Life Structures and Dynamics, Allied Signal, Stratford, CT
Gayda, J
NASA Lewis Research Center, Cleveland, Ohio
Gabb, TP
NASA Lewis Research Center, Cleveland, Ohio
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Developed by Committee: E08
Pages: 266–279
DOI: 10.1520/STP16458S
ISBN-EB: 978-0-8031-5325-7
ISBN-13: 978-0-8031-2001-3