Verification of Cold Working and Interference Levels at Fastener Holes

This report was developed under a SBIR contract for Topic AF081-088. The overall objective of Phase I was to perform the initial research to understand the residual stress behavior around cold-worked holes that are subsequently subjected to operation load cycles. The desired end state is to define t...

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Bibliographic Details
Main Authors: Mills, Thomas B, Honeycutt, Kyle T, Prost-Domasky, Scott A, Brooks, Craig L
Format: Report
Language:English
Subjects:
COLD WORKING
Fabrication Metallurgy
FASTENER HOLES
FATIGUE
HOLES(OPENINGS)
INTERFERENCE
LIFE EXPECTANCY(SERVICE LIFE)
LOADS(FORCES)
RESIDUAL STRESS
SBIR REPORTS
SBIR TOPIC AF081-088 PHASE 1
SBIR(SMALL BUSINESS INNOVATION RESEARCH)
SIMULATION
VERIFICATION
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Summary:This report was developed under a SBIR contract for Topic AF081-088. The overall objective of Phase I was to perform the initial research to understand the residual stress behavior around cold-worked holes that are subsequently subjected to operation load cycles. The desired end state is to define the path for developing a comprehensive analytical simulation of the service life capability in multiple applications that complement USAF fleet infrastructures. The research knowledge gained in Phase I formulated a sound approach for Phase II technology development and concurrent demonstration. The program that evolved factors in substantial USAF buy-in, which should expedite the products into benefits for the air vehicles. Prepared in cooperation with Texas Research Institute-Austin; National Research Council of Canada; Edison Welding Institute; and Direct Measurements, Inc.