Probabilistic analysis of multi-site damage in aircraft fuselages |
| |
Authors: | C Proppe |
| |
Affiliation: | (1) Institute of Engineering Mechanics, Leopold-Franzens University, Innsbruck, Austria e-mail: carsten.proppe@uibk.ac.at, AT |
| |
Abstract: | Most aircraft fleets nowadays are operating under the concept of damage tolerance, which requires an aircraft to have sufficient
residual strength in the presence of damage in one of its principal structural elements (PSE) during the interval of service
inspections. The residual strength however is significantly reduced due to multi site damage (MSD). In the present paper,
a probabilistic framework for the computation of the failure probability is developed. The MSD problem of a PSE is considered,
where the uncertainties in crack initiation and crack growth as well as yield stress and fracture toughness are described
by random variables. For the crack growth calculations the finite element alternating method 1], which avoids a remeshing
of the finite element problem, is used. After specifying link up and failure criteria, importance sampling is employed to
obtain the probability of failure of the PSE due to MSD.
Received: 29 July 2002 / Accepted: 18 December 2002 |
| |
Keywords: | Multi site damage Finite element alternating method Probabilistic fracture mechanics Computational stochastic mechanics Structural reliability |
本文献已被 SpringerLink 等数据库收录! |
|