Stochastic analysis for short edge cracks under selected loads

2018 ◽  
Author(s):  
Martin Krejsa ◽  
Jiri Brozovsky ◽  
Petr Lehner ◽  
Stanislav Seitl ◽  
Zdenek Kala
Keyword(s):  
Stochastic Analysis ◽  
Short Edge ◽  
Edge Cracks

Comparison of Calibration Functions for Short Edge Cracks under Selected Loads

2017 ◽  
Vol 754 ◽  
pp. 353-356 ◽  
Author(s):  
Stanislav Seitl ◽  
Petr Miarka ◽  
Lucie Malíková ◽  
Martin Krejsa
Keyword(s):  
Fatigue Crack ◽  
Fatigue Cracks ◽  
Steel Structures ◽  
Initial Crack ◽  
Pure Bending ◽  
Short Edge ◽  
Four Point Bending ◽  
Linear Fracture ◽  
Long Time ◽  
Edge Cracks

Attention to the fatigue cracks in steel structures and bridges has been paid for long time. In spite to efforts to eliminate the creation and propagation of fatigue cracks throughout the designed service life, cracks are still revealed during inspections. Note, that depending on location of initial crack, the crack may propagate from the edge or from the surface. The theoretical model of fatigue crack progression is based on linear fracture mechanics. Steel specimens are subjected to various load (tension, three-and four-point bending, pure bending etc.). The calibration functions for short edge cracks are compared for various load and the discrepancies are discussed.

Plastic deformation at short edge cracks under fatigue loading

2000 ◽  
Vol 66 (4) ◽  
pp. 357-374 ◽  
Author(s):  
Franz O. Riemelmoser ◽  
Peter Gumbsch ◽  
Reinhard Pippan
Keyword(s):  
Plastic Deformation ◽  
Fatigue Loading ◽  
Short Edge ◽  
Edge Cracks

scholarly journals Probabilistic fatigue analysis of existing steel structure

2020 ◽  
Vol 310 ◽  
pp. 00012
Author(s):  
Martin Krejsa ◽  
Jiří Brožovský ◽  
Petr Lehner ◽  
Stanislav Seitl ◽  
Zdeněk Kala ◽  
...  
Keyword(s):  
Fatigue Damage ◽  
Stochastic Analysis ◽  
Steel Structure ◽  
Linear Fracture ◽  
Time Calibration ◽  
Load Effects ◽  
Edge Cracks ◽  
Resistance Assessment ◽  
Loaded Structure ◽  
Over Time

The paper deals with evaluation of possible fatigue damage of existing steel crane structure. It is possible to use the some traditional methods to solve the problem - a concept of fatigue S-N curves (which are mainly used for designing of a new structures) or the procedures based on linear fracture mechanics utilizing the Paris-Erdogan’s law (which are suitable for estimation of remaining lifetime). For the resistance assessment the relevant data of load effects caused by cyclically loaded structure operation are necessary for both concepts. For the prediction of fatigue damage over time, calibration functions for short edge cracks were derived based on the results of the experiment, and the acceptable size of the fatigue crack in damaged structural component under analysis was determined. Using the derived relationships, a stochastic analysis of the selected element was performed and the results are discussed.

Wavelet-based model for stochastic analysis of beam structures

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 465-470 ◽  
Author(s):  
Hong Mei ◽  
Om P. Agrawal ◽  
Shantaram S. Pai
Keyword(s):  
Stochastic Analysis ◽  
Beam Structures

Application of wavelets and K-L expansion for stochastic analysis of structures

1997 ◽  
Author(s):  
Mei Hong ◽  
Om Agrawal ◽  
Shantaram Pai ◽  
Mei Hong ◽  
Om Agrawal ◽  
...  
Keyword(s):  
Stochastic Analysis
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