Effects of pore(s)-crack locations and arrangements on crack growth modeling in porous media

The general scheme of crack growth modeling and periodicity of aviation structure elements checks was developed. The major factors determined the scale of inaccuracy calculation ( εN*) based on calculations of crack growth duration (N*) and inspections intervals (τ0) were marked and estimated with the block diagram.

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Thermomechanical Fatigue Crack Growth Modeling in a Ni-Based Superalloy Subjected to Sustained Load

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4031158 ◽

2015 ◽

Vol 138 (1) ◽

Cited By ~ 1

Author(s):

Erik Storgärds ◽

Kjell Simonsson ◽

Sören Sjöström ◽

Johan Moverare

Keyword(s):

Crack Growth ◽

Damage Model ◽

Growth Modeling ◽

Maximum Load ◽

Thermomechanical Fatigue ◽

Parameter Determination ◽

Sustained Load ◽

Notched Specimen ◽

Number Of Cycles ◽

Crack Growth Modeling

Thermomechanical fatigue (TMF) crack growth modeling has been conducted on Inconel 718 with dwell time at maximum load. A history dependent damage model taking dwell damage into account, developed under isothermal conditions, has been extended for TMF conditions. Parameter determination for the model is carried out on isothermal load controlled tests at 550–650 °C for surface cracks, which later have been used to extrapolate parameters used for TMF crack growth. Further, validation of the developed model is conducted on a notched specimen subjected to strain control at 50–550 °C. Satisfying results are gained within reasonable scatter level compared for test and simulated number of cycles to failure.

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Multiscale Fatigue Crack Growth Modeling for Welded Stiffened Panels

Handbook of Mechanics of Materials ◽

10.1007/978-981-10-6855-3_73-1 ◽

2018 ◽

pp. 1-21

Author(s):

Ž. Božić ◽

S. Schmauder ◽

M. Mlikota ◽

M. Hummel

Keyword(s):

Fatigue Crack ◽

Fatigue Crack Growth ◽

Crack Growth ◽

Growth Modeling ◽

Stiffened Panels ◽

Crack Growth Modeling

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Deterministic and probabilistic creep–fatigue–oxidation crack growth modeling

Probabilistic Engineering Mechanics ◽

10.1016/j.probengmech.2013.03.004 ◽

2013 ◽

Vol 33 ◽

pp. 126-134 ◽

Cited By ~ 19

Author(s):

Zhigang Wei ◽

Fulun Yang ◽

Burt Lin ◽

Limin Luo ◽

Dmitri Konson ◽

...

Keyword(s):

Crack Growth ◽

Growth Modeling ◽

Creep Fatigue ◽

Crack Growth Modeling

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A New Scheme for Crack Growth Modeling by Coupling Modified Quarter Point Crack-Tip Element and the Level Set Method

The Journal of Engineering Research [TJER] ◽

10.24200/tjer.vol10iss2pp46-51 ◽

2013 ◽

Vol 10 (2) ◽

pp. 46

Author(s):

Y Abdelaziz

Keyword(s):

Crack Growth ◽

Level Set Method ◽

Level Set ◽

Edge Crack ◽

Numerical Test ◽

Growth Modeling ◽

Crack Tip ◽

Plate Specimen ◽

Crack Tip Element ◽

Crack Growth Modeling

In this paper, an efficient, numerical procedure is presented to track crack growth modeling without remeshing. The method's key feature is the coupling of a modified quarter-point crack tip element (MQPE) with the level set method (LSM) for crack growth problems. The LSM was used to represent the crack location, including the location of crack tips. The MQPE was used to compute the stress and displacement fields necessary for determining the rate of crack growth. Numerical test cases including various geometrical exceptions (the center-crack plate specimen, the single edge-crack plate specimen, and the double-edge crack plate) demonstrate the accuracy, robustness, and efficiency of the MQPE/LSM coupling. The extrapolation technique was used to estimate numerically the calibration factor for various specimens. This work confirms the feasibility of the MQPE/LSM to model accurately the singularity existing in the vicinity of the cracks. It allows an economic and adequate calculation of the stress intensity factors, which can be introduced into the various criteria of fracture or laws of propagation of the crack. The new method reduces the need for remeshing, and results agree well with reference data.

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