Analysis of fatigue crack growth in pin-loaded lug joints under in elastic deformations

Prakash, Raghu V and Raju, KN and Kumar, Sathish K and Dattaguru, B and Ramamurthy, TS (1995) Analysis of fatigue crack growth in pin-loaded lug joints under in elastic deformations. In: 27th International Symposium on Fatigue and fracture mechanics, 26-29 June 1995, United States.

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Abstract

Results of an experimental program on fatigue crack growth in an interference fit lug joint and numerical estimation of relevant fracture parameters to correlate the experimental data are presented. Fatigue crack growth rates of naturally initiating cracks were estimated fractographically as a function of crack length for lug joints fitted with different levels of interference. The fracture parameters to correlate the crack growth behavior were estimated using a 2D materially nonlinear contact stress finite element analysis. A path-independent integral, computed for incremental loads and summed up during cyclic loading, was used as an elasto-plastic fracture parameter. Correlation of the experimental crack growth data and the evaluated range of Delta-T resulted in a power law similar to the Paris equation. Further, the fatigue crack growth rate was evaluated using the relationship between low cycle fatigue parameters and Delta-T, as estimated. These are in good agreement with the experimental results. (Author

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Joints;Pins;Fatiguie life; Crack propagation;Stress intensity factors;Fracture mechanics
Subjects: AERONAUTICS > Aeronautics (General)
Division/Department: Structural Integrity Division, Materials Science Division, Propulsion Division, Structures Division, Other
Depositing User: M/S ICAST NAL
Date Deposited: 08 Nov 2006
Last Modified: 24 May 2010 09:50
URI: http://nal-ir.nal.res.in/id/eprint/2758

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