FATIQUE STRENGTH DESIGN AND ANALYSIS OF AIRCRAFT STRUCTURES. PART II. FATIGUE LIFE ANALYSIS COMPUTER PROGRAM--USER'S MANUAL.
Final rept. Dec 65-Sep 66
DOUGLAS AIRCRAFT CO LONG BEACH CA AIRCRAFT DIV
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The computer program for the calculation of structural fatigue damage is completely defined in the form of a users manual. The program, although primarily directed for the fatigue analysis of aircraft structures, is applicable to any general fatigue damage calculation using the linear Palmgren-Miner damage rule. Input data basically consists of the loads spectrum and fatigue strength allowables - S-N data. The program is especially conducive to mission-flight profile analysis and includes gust loads spectrum equation of MIL-A-8866, calculation of rigid airplane c.g. vertical load factor response due to continuous turbulence, and the automatic definition and damage calculation of the Ground-Air-Ground cycles from the mission profile spectrum.
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