SYMPOSIA PAPER Published: 01 January 1995
STP13053S

Development of Fracture Control Methodology for Threaded Fasteners in the Space Program

Source

High-strength threaded fasteners are used in many critical applications in aer- ospace hardware. This paper outlines a fracture control methodology that can be applied to prevent their structural failure due to the presence and/or propagation of crack-like defects. In cases where the failure of a single fastener would result in a catastrophic failure, fracture control is usually implemented either by nondestructive inspection followed by a fracture me- chanics analysis of life or by a proof test approach. Special nondestructive techniques are usually required for flaw detection at thread roots. This paper discusses the procedures necessary for determining probability of detection values for threaded fasteners, including methods of fabricating threaded fatigue crack specimens and the statistical methods used to reduce reliability data.

Author Information

Henkener, JA
Lockheed Engineering & Sciences Co., Houston, TX
Shamala, AR
Lockheed Engineering & Sciences Co., Houston, TX
Carper, PL
Lockheed Engineering & Sciences Co., Houston, TX
Forman, RG
National Aeronautics and Space Administration, Lyndon B. Johnson Space Center, Houston, TX
Salkowski, CL
National Aeronautics and Space Administration, Lyndon B. Johnson Space Center, Houston, TX
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Details
Developed by Committee: E08
Pages: 155–165
DOI: 10.1520/STP13053S
ISBN-EB: 978-0-8031-5300-4
ISBN-13: 978-0-8031-2017-4