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The application of reliability methods in the design of tophat stiffened composite panels under in-plane loading

The application of reliability methods in the design of tophat stiffened composite panels under in-plane loading
The application of reliability methods in the design of tophat stiffened composite panels under in-plane loading
Composite materials have been widely used in modern engineering fields such as aircraft, space and marine structures due to their high strength-to-weight and stiffness-to-weight ratios. However, structural efficiency gained through the adoption of composite materials can only be guaranteed by understanding the influence of production upon as-designed performance. In particular, topologies that are challenging to production including panels stiffened with pi or tophat stiffeners dominate many engineering applications and often observe complex loading. The design of stiffened composite panels against buckling is a key point of composite structures. While a growing number of studies are related to the reliability analysis of composites few of these relate to the local analysis of more complicated structures. Furthermore for the assessment of these structures in a design environment it is important to have models that allow the rapid assessment of the reliability of these local structures. This paper explores the use of a stochastic approach to the design of stiffened composite panels for which typical applications can be found in composite ship structures. A parametric study is conducted using Navier grillage theory and First-order Reliability Methods to investigate any detectable trend in the safety index with various design parameters. Finally, recommendations are made to provide guidance on applications.
tophat-stiffened, reliability based design, sensitivity
0951-8339
68-83
Yang, N.
5f9a94b8-5e8a-4dbe-9da2-f6d3359b0a0f
Das, P.K.
6a6454aa-cf1c-4048-9fda-20e2481fdba1
Blake, J.I.R.
6afa420d-0936-4acc-861b-36885406c891
Sobey, A.J.
e850606f-aa79-4c99-8682-2cfffda3cd28
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960
Yang, N.
5f9a94b8-5e8a-4dbe-9da2-f6d3359b0a0f
Das, P.K.
6a6454aa-cf1c-4048-9fda-20e2481fdba1
Blake, J.I.R.
6afa420d-0936-4acc-861b-36885406c891
Sobey, A.J.
e850606f-aa79-4c99-8682-2cfffda3cd28
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960

Yang, N., Das, P.K., Blake, J.I.R., Sobey, A.J. and Shenoi, R.A. (2013) The application of reliability methods in the design of tophat stiffened composite panels under in-plane loading. Marine Structures, 32, 68-83. (doi:10.1016/j.marstruc.2013.03.002).

Record type: Article

Abstract

Composite materials have been widely used in modern engineering fields such as aircraft, space and marine structures due to their high strength-to-weight and stiffness-to-weight ratios. However, structural efficiency gained through the adoption of composite materials can only be guaranteed by understanding the influence of production upon as-designed performance. In particular, topologies that are challenging to production including panels stiffened with pi or tophat stiffeners dominate many engineering applications and often observe complex loading. The design of stiffened composite panels against buckling is a key point of composite structures. While a growing number of studies are related to the reliability analysis of composites few of these relate to the local analysis of more complicated structures. Furthermore for the assessment of these structures in a design environment it is important to have models that allow the rapid assessment of the reliability of these local structures. This paper explores the use of a stochastic approach to the design of stiffened composite panels for which typical applications can be found in composite ship structures. A parametric study is conducted using Navier grillage theory and First-order Reliability Methods to investigate any detectable trend in the safety index with various design parameters. Finally, recommendations are made to provide guidance on applications.

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The Application of Reliability Methods in the Design of Tophat Stiffened Composite Panels under_revised FINAL.pdf - Accepted Manuscript
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Published date: July 2013
Keywords: tophat-stiffened, reliability based design, sensitivity
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 349501
URI: http://eprints.soton.ac.uk/id/eprint/349501
ISSN: 0951-8339
PURE UUID: b04abcac-df29-4c9c-9579-09527d06d8bc
ORCID for J.I.R. Blake: ORCID iD orcid.org/0000-0001-5291-8233
ORCID for A.J. Sobey: ORCID iD orcid.org/0000-0001-6880-8338

Catalogue record

Date deposited: 06 Mar 2013 12:31
Last modified: 18 Feb 2021 17:09

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Contributors

Author: N. Yang
Author: P.K. Das
Author: J.I.R. Blake ORCID iD
Author: A.J. Sobey ORCID iD
Author: R.A. Shenoi

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