Imperial College London
Portrait Picture

M H Ferri Aliabadi

Faculty of Engineering, Department of Aeronautics

Chair in Aerostructures
 
 
 
//

Contact

 

+44 (0)20 7594 5077m.h.aliabadi

 
 
//

Assistant

 

Miss Lisa Kelly +44 (0)20 7594 5056

 
//

Location

 

CAGB323City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Morse:2020:10.1016/j.engfracmech.2020.107271,
author = {Morse, L and Sharif, Khodaei Z and Aliabadi, MH},
doi = {10.1016/j.engfracmech.2020.107271},
journal = {Engineering Fracture Mechanics},
title = {Statistical inference of the equivalent initial flaw size for assembled plate structures with the dual boundary element method},
url = {http://dx.doi.org/10.1016/j.engfracmech.2020.107271},
volume = {238},
year = {2020}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The statistical inference of the Equivalent Initial Flaw Size Distribution (EIFSD) is developed for the first time using the Dual Boundary Element Method (DBEM) for assembled shear deformable plate structures. As part of this inference procedure, Bayesian updating is employed to enable the continuous refinement of the EIFSD via data obtained by many simulated routine inspections of a stiffened panel from a fleet of aircraft. Fatigue crack growth is modelled using an incremental crack growth procedure that only requires modelling of the boundary of the 2.5D structure with line elements and requires no remeshing during crack growth simulations. Stochastic Kriging is employed to account for the stochastic nature of fatigue crack growth and to offset the high computational cost associated with modelling complex built-up structures. To demonstrate the efficiency of the proposed inference methodology, a numerical example featuring a stiffened panel subjected to complex loading in the form of combined tension and bending is presented. Once the EIFSD has been inferred, it can be used to optimise the intervals between routine aircraft inspections via the use of reliability analysis techniques as part of a combined reliability-EIFS approach. It is demonstrated that the proposed methodology offers the capability to reduce the costs associated with inspections.
AU  - Morse,L
AU  - Sharif,Khodaei Z
AU  - Aliabadi,MH
DO  - 10.1016/j.engfracmech.2020.107271
PY  - 2020///
SN  - 0013-7944
TI  - Statistical inference of the equivalent initial flaw size for assembled plate structures with the dual boundary element method
T2  - Engineering Fracture Mechanics
UR  - http://dx.doi.org/10.1016/j.engfracmech.2020.107271
UR  - http://hdl.handle.net/10044/1/81697
VL  - 238
ER  -
Download