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- W4387611163 abstract "The stochastic modeling and calibration of an anisotropic elasto-plastic model for additive manufacturing materials are addressed in this work. We specifically focus on 316L stainless steel, produced by directed energy deposition. Tensile specimens machined from two additive manufactured (AM) box-structures were used to characterize material anisotropy and random spatial variations in elasticity and plasticity material parameters. Tensile specimens were cut parallel (horizontal) and perpendicular (vertical) to the AM deposition plane and were indexed by location. These results show substantial variability in both regimes, with fluctuation levels that differ between specimens loaded in the parallel and perpendicular build directions. Stochastic representations for the stiffness and Hill’s criterion coefficients random fields are presented next. Information-theoretic models are derived within the class of translation random fields, with the aim of promoting identifiability with limited data. The approach allows for the constitutive models to be generated on arbitrary geometries, using the so-called stochastic partial differential approach (to sampling). These representations are then partially calibrated using the aforementioned experimental results, hence enabling subsequent propagation analyses. Sampling is finally exemplified on the considered structure." @default.
- W4387611163 created "2023-10-14" @default.
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- W4387611163 date "2023-10-01" @default.
- W4387611163 modified "2023-10-14" @default.
- W4387611163 title "Stochastic modeling of spatially-dependent elastoplastic parameters in 316L stainless steel produced by direct energy deposition" @default.
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- W4387611163 doi "https://doi.org/10.1016/j.mechmat.2023.104821" @default.
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