Abstract
A finite-element-based simulation technique is being developed to predict 3-D, arbitrary, non-planar evolution of mixed-mode crack growth. The approach combines a geometrically explicit crack front re-meshing scheme, and an energy-based growth formulation to predict extension magnitudes along the crack front. The technique also leverages a new 3-D mixed-mode energy release rate decomposition using the virtual crack extension (VCE) method. The energy-based crack growth formulation, previously implemented for planar crack growth, is extended to non-planar growth situations by employing a basis-function approach to describe crack front extensions. Rather than determining point-by-point extensions, calculating a governing function alleviates numerical influences on the crack growth predictions. The simulation technique seeks to mitigate computationally biased crack growth, as found in prescribed and mesh dependent methods, for example.
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Acknowledgements
This work was funded by the NASA University Institutes Project under Grant NCC3-989, and the Cornell University Ross-Tetelman Fellowship in Civil and Environmental Engineering.
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Davis, B.R., Wawrzynek, P.A., Ingraffea, A.R. (2015). Simulation of Arbitrary Mixed-Mode Crack Growth Using an Energy-Based Approach. In: Carroll, J., Daly, S. (eds) Fracture, Fatigue, Failure, and Damage Evolution, Volume 5. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-06977-7_1
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DOI: https://doi.org/10.1007/978-3-319-06977-7_1
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