TY - JOUR
T1 - Fatigue design of welded double-sided T-joints and double-sided cruciform joints in steel marine structures
T2 - A total stress concept
AU - Qin, Yanxin
AU - den Besten, Henk
AU - Palkar, Saloni
AU - Kaminski, Miroslaw Lech
PY - 2019
Y1 - 2019
N2 - Fatigue is a governing design limit state for marine structures. Welded joints are important in that respect. The weld notch stress (intensity) distributions contain essential information and formulations have been established to obtain a total stress fatigue damage criterion and corresponding fatigue resistance curve; a total stress concept. However, the involved weld load carrying stress model does not provide the required estimates and trends for varying geometry dimensions and loading & response combinations. A new one has been developed and performance evaluation for T-joints and cruciform joints in steel marine structures shows that in comparison with the nominal stress, hot spot structural stress and effective notch stress concept based results up to 50% more accurate fatigue design life time estimates can be obtained. Taking advantage of the weld notch stress formulations, the effective notch stress concept performance has improved adopting a stress-averaged criterion rather than a fictitious notch radius-based one.
AB - Fatigue is a governing design limit state for marine structures. Welded joints are important in that respect. The weld notch stress (intensity) distributions contain essential information and formulations have been established to obtain a total stress fatigue damage criterion and corresponding fatigue resistance curve; a total stress concept. However, the involved weld load carrying stress model does not provide the required estimates and trends for varying geometry dimensions and loading & response combinations. A new one has been developed and performance evaluation for T-joints and cruciform joints in steel marine structures shows that in comparison with the nominal stress, hot spot structural stress and effective notch stress concept based results up to 50% more accurate fatigue design life time estimates can be obtained. Taking advantage of the weld notch stress formulations, the effective notch stress concept performance has improved adopting a stress-averaged criterion rather than a fictitious notch radius-based one.
KW - fatigue design
KW - joint resistance curve
KW - steel marine structures
KW - total stress criterion
KW - welded double-sided cruciform joints
KW - welded double-sided T-joints
UR - http://www.scopus.com/inward/record.url?scp=85072040047&partnerID=8YFLogxK
U2 - 10.1111/ffe.13089
DO - 10.1111/ffe.13089
M3 - Article
AN - SCOPUS:85072040047
SN - 8756-758X
VL - 42
SP - 2674
EP - 2693
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
IS - 12
ER -