TY - JOUR
T1 - Predictions of widespread fatigue damage thresholds in aging aircraft
AU - Wang, L.
AU - Chow, W. T.
AU - Kawai, H.
AU - Atluri, S. N.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1998/3
Y1 - 1998/3
N2 - Commercial transport aircraft are required to operate under the concept of damage tolerance. Because of the structural redundancy and the crack arrest capability, the current fleet of commercial aircraft was initially designed to have sufficient residual strength to sustain discrete source damage. However, fatigue damage during the life of an aircraft can significantly reduce the residual strength of an aging aircraft. It is important to predict the threshold for the onset of widespread fatigue damage, i.e., the initiation and growth of cracks at rivet holes (multiple site damage) to threshold sizes at which, in conjunction with a lead crack, the residual strength of the aircraft may fall below the limit load. A hierarchical global-intermediate-local approach is presented for the numerical predictions of the widespread fatigue damage thresholds. A detailed numerical study is presented to illustrate the importance of 1) the use of elastic-plastic fracture mechanics to assess the residual strength and 2) the importance of the local stresses due to rivet misfit, clamping, cold working, fretting, etc., in assessing the numbr of fatigue cycles to reache the widespread fatigue damage threshold far an aging aircraft.
AB - Commercial transport aircraft are required to operate under the concept of damage tolerance. Because of the structural redundancy and the crack arrest capability, the current fleet of commercial aircraft was initially designed to have sufficient residual strength to sustain discrete source damage. However, fatigue damage during the life of an aircraft can significantly reduce the residual strength of an aging aircraft. It is important to predict the threshold for the onset of widespread fatigue damage, i.e., the initiation and growth of cracks at rivet holes (multiple site damage) to threshold sizes at which, in conjunction with a lead crack, the residual strength of the aircraft may fall below the limit load. A hierarchical global-intermediate-local approach is presented for the numerical predictions of the widespread fatigue damage thresholds. A detailed numerical study is presented to illustrate the importance of 1) the use of elastic-plastic fracture mechanics to assess the residual strength and 2) the importance of the local stresses due to rivet misfit, clamping, cold working, fretting, etc., in assessing the numbr of fatigue cycles to reache the widespread fatigue damage threshold far an aging aircraft.
UR - http://www.scopus.com/inward/record.url?scp=3643127261&partnerID=8YFLogxK
U2 - 10.2514/2.386
DO - 10.2514/2.386
M3 - Article
AN - SCOPUS:3643127261
VL - 36
SP - 457
EP - 464
JO - AIAA Journal
JF - AIAA Journal
SN - 0001-1452
IS - 3
ER -