Physical Prototype Centered Assessment for Fatigue Life of Structure.

The actual load spectrum applied on structures is the key of the fatigue life monitoring. This paper presents a method of physical prototype centered assessment for fatigue life of structure based on on-line monitoring data. Firstly the load spectrums of fatigue hot regions are recorded by some sensors, then the load of the structure is inversely computed by physical prototype, finally the fatigue life of the structure is estimated according to the measured stress and strain history. A specimen of lug is tested and the strains of eight points near the hole are recorded, and then the fatigue life is estimated. The results show the feasibility and effectiveness of the proposed method. [ABSTRACT FROM AUTHOR]