Analysis of multiple site damage in aging aircraft
- Purdue Univ., West Lafayette, IN (United States)
This paper deals with predicting the fatigue life and residual strength of structural components which contain cracks at several locations (multiple site damage -- MSD). A fracture mechanics analysis is described for a row of fastener holes which contain various combinations of initial cracks. The initial growth and coalescence of multiple cracks into a large dominant flaw which eventually leads to failure is described, along with the formation of cracks at holes which are originally uncracked. The main goal is to determine the influence of MSD on the residual strength of the structural component, and to determine how damage tolerance of the member is degraded by MSD. Results of the fracture mechanics analysis for fatigue tests of panels which contain a row of open holes are described, along with ongoing research to extend the analysis to account for the presence of stiffeners and load transfer through mechanical joints.
- OSTI ID:
- 175118
- Report Number(s):
- CONF-950686--
- Country of Publication:
- United States
- Language:
- English
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