Fatigue crack growth monitoring at elevated temperatures using multiplexed Fiber Bragg Gratings

2009 ◽  
Author(s):  
Richard J. Black ◽  
David J. Zare ◽  
Levy Oblea ◽  
Behzad M. Moslehi ◽  
Shamachary Sathish ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Elevated Temperatures ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Growth Monitoring

scholarly journals A Concise Binomial Model for Nonlinear Creep-Fatigue Crack Growth Behavior at Elevated Temperatures

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 651
Author(s):  
Jianxing Mao ◽  
Zhixing Xiao ◽  
Dianyin Hu ◽  
Xiaojun Guo ◽  
Rongqiao Wang
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Dwell Time ◽  
Elevated Temperatures ◽  
Nonlinear Creep ◽  
Nickel Based Superalloy ◽  
Proposed Model ◽  
Creep Fatigue ◽  
Creep Fatigue Crack

The creep-fatigue crack growth problem remains challenging since materials exhibit different linear and nonlinear behaviors depending on the environmental and loading conditions. In this paper, we systematically carried out a series of creep-fatigue crack growth experiments to evaluate the influence from temperature, stress ratio, and dwell time for the nickel-based superalloy GH4720Li. A transition from coupled fatigue-dominated fracture to creep-dominated fracture was observed with the increase of dwell time at 600 °C, while only the creep-dominated fracture existed at 700 °C, regardless of the dwell time. A concise binomial crack growth model was constructed on the basis of existing phenomenal models, where the linear terms are included to express the behavior under pure creep loading, and the nonlinear terms were introduced to represent the behavior near the fracture toughness and during the creep-fatigue interaction. Through the model implementation and validation of the proposed model, the correlation coefficient is higher than 0.9 on ten out of twelve sets of experimental data, revealing the accuracy of the proposed model. This work contributes to an enrichment of creep-fatigue crack growth data in the typical nickel-based superalloy at elevated temperatures and could be referable in the modeling for damage tolerance assessment of turbine disks.

scholarly journals Fatigue Crack Growth of Ti-6Al-4V Alloy at Elevated Temperatures.

1993 ◽  
Vol 42 (481) ◽  
pp. 1186-1192 ◽  
Author(s):  
Takeshi OGAWA ◽  
Yasumasa HAYASHI ◽  
Keiro TOKAJI ◽  
Motohisa HIROSE
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Elevated Temperatures

scholarly journals FATIGUE CRACK GROWTH MONITORING OF AN ALUMINUM JOINT STRUCTURE

2010 ◽  
Author(s):  
C. J. Lissenden ◽  
H. Cho ◽  
C. S. Kim ◽  
Donald O. Thompson ◽  
Dale E. Chimenti
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Monitoring ◽  
Joint Structure

Fatigue crack growth monitoring of idealized gearbox spline component using acoustic emission

2016 ◽  
Author(s):  
Lu Zhang ◽  
Didem Ozevin ◽  
William Hardman ◽  
Seth Kessler ◽  
Alan Timmons
Keyword(s):  
Acoustic Emission ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Monitoring
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