Abstract
The paper discusses the effect of stress state on ductile damage behavior. The continuum model has been generalized to take into account stress state dependence of the damage criterion with branches corresponding to different damage mechanisms depending on the stress triaxiality and the Lode parameter. Experiments with differently notched tension and shear specimens taken from aluminum sheets are used to identify basic material parameters. Additional series of micro-mechanical numerical analyses of void containing unit cells have been performed to be able to get more insight in the complex damage and failure behavior of ductile metals. These calculations cover a wide range of stress triaxialities and Lode parameters. The numerical results are used to show general trends, to develop equations for the damage criterion, and to identify material parameters of the continuum model.
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Financial support from the Deutsche Forschungsgemeinschaft (German Research Foundation, BR1793/12-1) is gratefully acknowledged.
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Brünig, M., Gerke, S., Hagenbrock, V. (2013). Micro-Mechanical Numerical Studies on the Stress State Dependence of Ductile Damage. In: Altenbach, H., Kruch, S. (eds) Advanced Materials Modelling for Structures. Advanced Structured Materials, vol 19. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35167-9_9
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DOI: https://doi.org/10.1007/978-3-642-35167-9_9
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