Imperial College London
Portrait Picture

M H Ferri Aliabadi

Faculty of Engineering, Department of Aeronautics

Chair in Aerostructures
 
 
 
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Contact

 

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

 
 
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Assistant

 

Miss Lisa Kelly +44 (0)20 7594 5056

 
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Location

 

CAGB323City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Farokhi:2020:10.1007/s00158-020-02565-9,
author = {Farokhi, H and Bacarreza, O and Aliabadi, MHF},
doi = {10.1007/s00158-020-02565-9},
journal = {Structural and Multidisciplinary Optimization: computer-aided optimal design of stressed solids and multidisciplinary systems},
pages = {1395--1417},
title = {Probabilistic optimisation of mono-stringer composite stiffened panels in post-buckling regime},
url = {http://dx.doi.org/10.1007/s00158-020-02565-9},
volume = {62},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In this paper, a multi-objective probabilistic design optimisation approach is presented for reliability and robustness analysis of composite structures and demonstrated on a mono-omega-stringer stiffened panel. The proposed approach utilises a global surrogate model of the composite structure while accounting for uncertainties in material properties as well as geometry. Unlike the multi-level optimisation approach which freezes some parameters at each level, the proposed approach allows for all parameters to change at the same time and hence ensures global optimum solutions in the given parameter design space (for both probabilistic and deterministic optimisations) within a certain degree of accuracy. The proposed approach is used in this study to conduct extensive multi-objective probabilistic and deterministic optimisations (without considering safety factors) on a mono-stringer stiffened panel. In particular, a global surrogate model is developed utilising the computational power of a high-performance computing facility. The inputs of the surrogate model are the omega-stringer geometry and the mechanical properties of the composite material, while the outputs are the fundamental linear buckling load (LBL) and the nonlinear post-buckling strength (NPS). LBL and NPS are obtained via detailed parametric finite element models of the mono-stringer stiffened panel; in the nonlinear model, the interface between the skin and the omega-stringer is modelled via cohesive elements to allow for debonding in the post-buckled regime. Extensive multi-objective optimisations are conducted on the surrogate model using deterministic and probabilistic approaches to examine the omega-stringer geometric parameters mostly affecting the system robustness and reliability. The differences between deterministic and probabilistic designs are highlighted as well.
AU  - Farokhi,H
AU  - Bacarreza,O
AU  - Aliabadi,MHF
DO  - 10.1007/s00158-020-02565-9
EP  - 1417
PY  - 2020///
SN  - 1615-147X
SP  - 1395
TI  - Probabilistic optimisation of mono-stringer composite stiffened panels in post-buckling regime
T2  - Structural and Multidisciplinary Optimization: computer-aided optimal design of stressed solids and multidisciplinary systems
UR  - http://dx.doi.org/10.1007/s00158-020-02565-9
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000533058500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://link.springer.com/article/10.1007%2Fs00158-020-02565-9
UR  - http://hdl.handle.net/10044/1/80709
VL  - 62
ER  -
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