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Advanced Life Analysis Methods. Volume 6. User's Manual for 'LUGRO' computer Program to Predict Crack Growth in Attachment Lugs
Final rept. 3 Sep 1980-30 Sep 1984
LOCKHEED-GEORGIA CO MARIETTA
Pagination or Media Count:
This report is Vol. VI of a 6-part final report on the work conducted under AFWAL contract. The objective of this research program is to develop the design criteria and analytical methods necessary to ensure the damage tolerance of aircraft attachment lugs. This volume describes the computer program LUGRO developed under this contract and provides user input instructions and input and output data for some sample problems. LUGRO is an automated computer program which has been developed using the state-of-the-art methodologies to predict the residual strength and fatigue crack growth behaviors of single through-the- thickness cracks and single corner cracks at attachment lugs. This section further describes the operation of the program, functions of the main program and the subroutines, and a flow-chart of the computer program. Originator- supplied keywords include Attachment lugs, Aircraft, Damage tolerance, Residual strength and crack growth prediction, Computer program, Users manual, Input instructions, Sample problems, and Computer printouts.
APPROVED FOR PUBLIC RELEASE