TY - GEN
T1 - MECHANISTICALLY-BASED FRACTURE MECHANICS MODELS FOR THE PREDICTION OF MULTIPLE SEMI-ELLIPTICAL CRACK GROWTH IN Q1N (HY80) PRESSURE VESSEL STEEL UNDER FATIGUE LOADING
AU - Soboyejo, W. O.
AU - Knott, J. F.
N1 - Publisher Copyright: © 1998 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1998
Y1 - 1998
N2 - Mechanistically-based fracture mechanics models are presented for the prediction of multiple semi-elliptical crack growth in QIN (HY80) pressure vessel steel. Following a review ofthe mechanisms of multiple coplanar and non-coplanar semi-elliptical fatigue crack growth, mechanistically-based fracture mechanics models are presented for the prediction of fatigue crack growth. The models include simplified fracture mechanics idealizations of crack interaction and coalescence of coplanar and offset non-coplanar cracks. Predictions obtained from the models are shown to be in closer agreement with measured fatigue crack growth data than the predictions obtained from current ASME Section XI and BS PD 6493 codes. The implications of the models are discussed for the prediction of fatigue life of structures and components that contain multiple configurations of semi-elliptical fatigue cracks.
AB - Mechanistically-based fracture mechanics models are presented for the prediction of multiple semi-elliptical crack growth in QIN (HY80) pressure vessel steel. Following a review ofthe mechanisms of multiple coplanar and non-coplanar semi-elliptical fatigue crack growth, mechanistically-based fracture mechanics models are presented for the prediction of fatigue crack growth. The models include simplified fracture mechanics idealizations of crack interaction and coalescence of coplanar and offset non-coplanar cracks. Predictions obtained from the models are shown to be in closer agreement with measured fatigue crack growth data than the predictions obtained from current ASME Section XI and BS PD 6493 codes. The implications of the models are discussed for the prediction of fatigue life of structures and components that contain multiple configurations of semi-elliptical fatigue cracks.
UR - https://www.scopus.com/pages/publications/85124381291
U2 - 10.1115/IMECE1998-1141
DO - 10.1115/IMECE1998-1141
M3 - Conference contribution
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 67
EP - 77
BT - Mechanical Behavior of Advanced Materials
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1998 International Mechanical Engineering Congress and Exposition, IMECE 1998
Y2 - 15 November 1998 through 20 November 1998
ER -