Numerical and Experimental Investigations of Curved Fatigue Crack Growth under Biaxial Proportional Cyclic Loading

Holger Theilig; D. Hartmann; Michael Wünsche; S. Henkel; P. Hübner

doi:10.4028/www.scientific.net/KEM.348-349.857

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Numerical and Experimental Investigations of Curved Fatigue Crack Growth under Biaxial Proportional Cyclic Loading

Abstract:

The paper presents numerical and experimental results of continued studies of curved fatigue crack growth in arbitrarily pre-cracked isotropic sheets under biaxial proportional plane loading. The predictor-corrector method (PCM) was extended in order to analyse the growth of multiple crack systems. As a result, the program PCCS-2D was written to run within ANSYS without any user interaction. In order to check the accuracy and efficiency of the method biaxial crack growth simulations were carried out for a fracture mechanics cruciform specimen. The results are compared with experimental findings obtained by specimens made of 6061 aluminium alloy in T651 condition using a 250kN biaxial servohydraulic testing machine. From the numerical and experimental results, we conclude, that the proposed predictor-corrector method can be used in curved crack growth simulation also under biaxial proportional loading conditions.

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Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

857-860

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.857

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Online since:

September 2007

Authors:

Holger Theilig, D. Hartmann, Michael Wünsche, S. Henkel, P. Hübner

Keywords:

Crack Path Simulation, Curved Crack Growth Experiment, Multiple Crack Systems, Predictor-Corrector Procedure, Proportional Biaxial Loading

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References

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