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Analysis of structures under uncertainties

da Cunha, Fabio and Chaves, Charlos and Degenhardt, Richard and Araujo, Franciso Cekio (2011) Analysis of structures under uncertainties. 6th Int. Conf. Supply on the Wings, 2.-4.Nov. 2011, Frankfurt, Germany.

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Abstract

Theories of uncertainty are applied to a large range of fields, and they have a special interest on engineering, because of safety and risk concerns related to human lives. This concern is very high on aerospace applications, where safety is truly the most critical requirement. The most common approach to deal with uncertainties due to lack of knowledge and inherent variability on aerospace structures is through the application of safety factors, which are design margins against failure. Safety factors are applied on all scales from simple components to more complex systems. Within this paper, inherent variabilities are expressed through statistical distributions, which is an alternative approach to traditional safety factors. Structures are interpreted as systems whose reliability level should be assessed. The range of application of these theories is large, and two examples related to aircraft structures are discussed in this work. In first example, the reliability analysis is applied to estimate the inspection interval for a typical structural aluminum joint, and in the second one, the reliability a composite structure under progressive damage until collapse is evaluated. The results obtained are presented and discussed.

Item URL in elib:https://elib.dlr.de/83830/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of structures under uncertainties
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
da Cunha, FabioUNSPECIFIEDUNSPECIFIED
Chaves, CharlosEmbraer, BrazilUNSPECIFIED
Degenhardt, RichardUNSPECIFIEDUNSPECIFIED
Araujo, Franciso CekioUFOP - Federal University of Ouro Preto. Ouro Preto – MG, BrazilUNSPECIFIED
Date:2011
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aerospace Structures, Uncertainty, Reliability
Event Title:6th Int. Conf. Supply on the Wings
Event Location:Frankfurt, Germany
Event Type:international Conference
Event Dates:2.-4.Nov. 2011
Organizer:AIRTEC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old), L - Structures & Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Degenhardt, Richard
Deposited On:10 Dec 2013 19:10
Last Modified:31 Jul 2019 19:41

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