Example design map. Stress intensity factor threshold, 5 ksi-square root of in. (typical value for AISI 9310 steel, the current standard material in aerospace drive system applications). For many of the cases, the mode I stress intensity factors were less than the stress intensity factor threshold, and thus, no crack propagation occurred. For these conditions, a backup ratio of 0.8 should be used to ensure that no rim failures occur.

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Last updated: June 2002

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Last updated: June 2002

Responsible NASA Official: Gynelle.C.Steele@nasa.gov
216-433-8258

Point of contact for NASA Glenn's Research & Technology reports: Cynthia.L.Dreibelbis@nasa.gov
216-433-2912
SGT, Inc.

Web page curator: Nancy.L.Obryan@nasa.gov
216-433-5793
Wyle Information Systems, LLC

NASA Web Privacy Policy and Important Notices