M. Liao, D.S. Forsyth, N.c. Bellinger

This paper presents a NRC in-house program, ProDTA (Probabilistic Damage Tolerance Analysis), which was developed to calculate the probability of failure (POF) of aircraft structures with both fatigue damage and environment related age degradation. The methodologies used by ProDTA were based on the holistic structural integrity process (HOLSIP) framework and enhanced probabilistic techniques. The HOLSIP-based lifing models were used for damage tolerance analysis under environmental and cyclic loading. The enhanced probabilistic techniques, which include probability integration and Monte Carlo simulation, were developed to incorporate the environment related random variables, such as corrosion growth rate (CGR) and pit depth (PD), in the POF calculation. Another unique feature is that the nondestructive inspection (NDI) results for corrosion were incorporated into ProDTA in order to quantify the effect of NDI on the damage tolerance analysis. ProDTA was first evaluated and verified with existing codes in several risk analysis examples on noncorroded structures. ProDTA was then applied to risk analyses on a typical Boeing lap joint containing fatigue and environmental damages. The effects of corrosion maintenance actions, such as the corrosion NDI, corrosion prevention compound (CPC) application, and grindout, on the damage state and failure risk of the structure were quantified using ProDTA.

23rd ICAF Symposium of the international Committee on Aeronautical Fatique, 2005, Hamburg

Conference Paper

englisch

A5, 12 Seiten

DGLR-Bericht, 2005, 2005-03, 23rd ICAF Symposium of the international Committee on Aeronautical Fatique - Proceedings; S.241-252; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

damage tolerance, fatigue, corrosion, nondestructive inspection, risk assessment

Bestellbar

2005