Influence of stiffener on fracture parameter and fatigue crack growth life of a finite aluminium alloy plate

The present paper discusses the methodology for prediction of fracture parameter, fatigue crack growth life (FC) and inspection interval (II) considering the stiffener effect using Afgrow software of NASGRO crack growth model. Based on numerically predicted normalised stress intensity factor ( β ) u...

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Bibliographic Details
Published in:Journal of the Brazilian Society of Mechanical Sciences and Engineering 2021-05, Vol.43 (5), Article 251
Main Authors: Srivastava, Amit Kumar, Arora, P. K.
Format: Article
Language:English
Subjects:
Aluminum base alloys
Crack propagation
Engineering
Fatigue failure
Finite element analysis
Finite element method
Fracture mechanics
Growth models
Inspection
Mechanical Engineering
Metal plates
Numerical prediction
Parameters
Software
Stress intensity factors
Technical Paper
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Summary:The present paper discusses the methodology for prediction of fracture parameter, fatigue crack growth life (FC) and inspection interval (II) considering the stiffener effect using Afgrow software of NASGRO crack growth model. Based on numerically predicted normalised stress intensity factor ( β ) using finite element method (FEM), correction factor (C.F.) in β of un-stiffened panel/plate is introduced to account for the stiffener effect. The β of stiffened plate is further used for prediction of fatigue crack growth life (FC) and II. The fracture parameters of stiffened panel for different crack lengths, stiffener area, and stiffener offset using FEM are predicted, which is further used for estimation of FC and II. The typical numerical prediction of fracture parameter using finite element method and FC with incorporation of C.F. using Afgrow software is compared with published experimental results and analytical prediction which show good conformity.
ISSN:1678-5878
1806-3691
DOI:10.1007/s40430-021-02968-9