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Structural performance envelopes in load space

Part of: Smart Aircraft International Symposium on Smart Aircraft 2019 Collection

Published online by Cambridge University Press:  17 November 2020

A. Dharmasaroja ,
C.G. Armstrong Open the ORCID record for C.G. Armstrong [Opens in a new window] ,
A. Murphy Open the ORCID record for A. Murphy [Opens in a new window] ,
T.T. Robinson Open the ORCID record for T.T. Robinson [Opens in a new window] ,
N.L. Iorga  and
J.R. Barron
A. Dharmasaroja
Affiliation:
School of Mechanical and Aerospace Engineering, Queen’s University Belfast, Belfast, UK
C.G. Armstrong
Affiliation:
School of Mechanical and Aerospace Engineering, Queen’s University Belfast, Belfast, UK
A. Murphy*
Affiliation:
School of Mechanical and Aerospace Engineering, Queen’s University Belfast, Belfast, UK
T.T. Robinson
Affiliation:
School of Mechanical and Aerospace Engineering, Queen’s University Belfast, Belfast, UK
N.L. Iorga
Affiliation:
Airbus, Bristol, UK
J.R. Barron
Affiliation:
Airbus, Toulouse, France
*
a.murphy@qub.ac.uk
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Abstract

Visualising the loads that a structure can tolerate provides a key insight into the structural design process, especially for materials and structures that are governed by complex failure criteria. This paper proposes a general method for efficient construction of performance envelopes in load space, and demonstrates the approach with two examples. The performance envelope identifies all possible failure modes, all the redundant and non-redundant structural constraints, and the limiting failure mode in a particular direction in load space. Once the envelope has been constructed, the structural reserve factors can be calculated extremely quickly. In design such envelopes are most useful for structural analysis processes which involve a very large number of load cases, and where the cost of constructing an envelope for a given feature is relatively modest.

Keywords

structural designcharacteristic loadsload spacereserve factorscomposite laminatecomposite failurestiffened panel
Type
Research Article
Information
The Aeronautical Journal , Volume 125 , Issue 1283 , January 2021 , pp. 127 - 150
Copyright
© The Author(s), 2020. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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