Data Fusion and Modeling for Fatigue Crack Growth Prediction

2007 ◽  
Author(s):  
D. Gary Harlow
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Data Fusion ◽  
Crack Growth ◽  
Growth Prediction

A research on fatigue crack growth monitoring based on multi-sensor and data fusion

2019 ◽  
pp. 147592171986572
Author(s):  
Chang Qi ◽  
Yang Weixi ◽  
Liu Jun ◽  
Gao Heming ◽  
Meng Yao
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Data Fusion ◽  
Crack Propagation ◽  
Finite Element Model ◽  
Crack Length ◽  
Crack Growth ◽  
Lamb Wave ◽  
Element Model

Fatigue crack propagation is one of the main problems in structural health monitoring. For the safety and operability of the metal structure, it is necessary to monitor the fatigue crack growth process of the structure in real time. In order to more accurately monitor the expansion of fatigue cracks, two kinds of sensors are used in this article: strain gauges and piezoelectric transducers. A model-based inverse finite element model algorithm is proposed to perform pattern recognition of fatigue crack length, and the fatigue crack monitoring experiment is carried out to verify the algorithm. The strain spectra of the specimen under cyclic load in the simulation and experimental crack propagation are obtained, respectively. The active lamb wave technique is also used to monitor the crack propagation. The relationship between the crack length and the lamb wave characteristic parameter is established. In order to improve the recognition accuracy of the crack propagation mode, the random forest and inverse finite element model algorithms are used to identify the crack length, and the Dempster–Shafer evidence theory is used as data fusion to integrate the conclusion of the two algorithms to make a more accountable and correct judge of the crack length. An experiment has been conducted to demonstrate the effectiveness of the method.

scholarly journals Determining finite-width-correction factors for fatigue crack growth prediction in GLARE using the equivalent compliance method

2019 ◽  
Vol 127 ◽  
pp. 74-81 ◽  
Author(s):  
Yuan Zhao ◽  
René Alderliesten ◽  
Zengwen Wu ◽  
Zhengong Zhou ◽  
Guodong Fang ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Finite Width ◽  
Correction Factors ◽  
Growth Prediction

Fatigue crack growth prediction of welded joints in low-cycle fatigue region

2017 ◽  
Vol 61 (6) ◽  
pp. 1189-1197
Author(s):  
Takeshi Hanji ◽  
Kazuo Tateishi ◽  
Nao Terao ◽  
Masaru Shimizu
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Welded Joints ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Growth Prediction
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