scholarly journals Fatigue Crack Propagation Characteristics and Microscopic Fracture Mechanisms in a Mild Steel Plate with a Small Circular Hole (in the Case of Ex-plane Bending Fatigue)

1984 ◽  
Vol 48 (3) ◽  
pp. 255-261 ◽  
Author(s):  
Takenobu Takeda ◽  
Shinichi Kikuchi ◽  
Yasuo Nasu ◽  
Seiichi Karashima
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Mild Steel ◽  
Circular Hole ◽  
Fatigue Crack Propagation ◽  
Steel Plate ◽  
Fracture Mechanisms ◽  
Propagation Characteristics ◽  
Bending Fatigue ◽  
Plane Bending

Corrosion Fatigue Crack Propagation Characteristics of TMCP Steel in Synthetic Seawater Condition under Wave Period

2007 ◽  
Vol 345-346 ◽  
pp. 1043-1046 ◽  
Author(s):  
Won Beom Kim ◽  
Jeom Kee Paik
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Corrosion Fatigue ◽  
Steel Plate ◽  
Offshore Structures ◽  
Correlation Factor ◽  
Propagation Characteristics ◽  
Synthetic Seawater ◽  
Corrosion Fatigue Crack

In this research, corrosion fatigue tests using 490MPa TMCP steel were performed in synthetic seawater condition to investigate the corrosion fatigue crack propagation characteristics of TMCP steel plate which is often used for ships and offshore structures from its weldability and weight reduction purpose. In addition, relationships between boundary correlation factor F(α,β) and α(= 2a/W) of the fracture mechanics formula for the test specimen which was exerted by the pin load were calculated for the evaluation of da/dN-.K. To get the boundary correlation factor F(α,β), the calculation of J as a path-independent line integral was carried out. The solutions of J integral showed similar value in spite of the different path. Crack propagation tests for the same steel in air condition was carried out also for comparison. Finally, it was clear from the crack propagation test results that the propagation rate of TMCP steel plate in synthetic seawater condition is faster than that of in air condition at least twice.

An investigation of bending fatigue crack propagation in structural steel by the measurement of indirect parameters

2014 ◽  
Vol 37 (1) ◽  
pp. 305-312 ◽  
Author(s):  
Ana Maria Gontijo Figueiredo ◽  
Gabriel de Oliveira Ribeiro ◽  
José Felipe Dias ◽  
Paulo José Modenesi ◽  
Felipe Leonardo Pereira Queiroz ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Structural Steel ◽  
Fatigue Crack Propagation ◽  
Bending Fatigue

Fatigue Crack Propagation in Mild Steel

1966 ◽  
Vol 5 (1) ◽  
pp. 19-34 ◽  
Author(s):  
D.G. Bellow ◽  
B. R. Long
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Mild Steel ◽  
Fatigue Crack Propagation

The Fatigue Crack and Delamination Behavior on the Fuselage-Wing Intersection Containing Variable Notches

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1540-1546 ◽  
Author(s):  
Sam Hong Song ◽  
Cheol Woong Kim
Keyword(s):  
Fatigue Crack ◽  
Stress Distribution ◽  
Crack Propagation ◽  
Circular Hole ◽  
Fatigue Crack Propagation ◽  
Aluminum Layer ◽  
Fiber Layer ◽  
Stress Criterion ◽  
Fatigue Crack Propagation Behavior ◽  
Propagation Behavior

The delamination and the fatigue crack propagation behavior in aramid fiber reinforced metal laminates(AFRMLs) containing a saw-cut and circular hole such as the fuselage-wing intersection was investigated. The fatigue crack propagation in aluminum layer is accompanied with the delamination between aluminum layer and fiber layer. The delamination deteriorates the fiber bridging mechanism in the crack tip of AFRMLs. Therefore, this study evaluates the stress distribution of AFRMLs containing a saw-cut and circular hole using the Average Stress Criterion (ASC) model. The delamination zone was observed by ultrasonic C-scan images. As the result of this study, in case of AFRMLs containing a saw-cut specimen. the fatigue crack propagation always occurred in aluminum layer and the delamination zone formed along the fatigue crack. However, in case of AFRMLs containing a circular hole specimen, the delamination zone was formed in two types. First, delamination zone was formed along the fatigue crack in aluminum layer. Second, delamination zone was formed without any fatigue crack around the circular hole. Consequently, delamination zone was formed dependently on the notch shape and the stress distribution.

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