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Meeting 2027 TMS Annual Meeting & Exhibition
Symposium Verification, Calibration, and Validation Approaches for Mechanical Modeling of Metals
Presentation Title Validation of a multiscale ductile damage model for the dynamic fragmentation of additively manufactured porous metal rings
Author(s) Caleb Foster, Justin Wayne Wilkerson, José Rodríguez-Martínez
On-Site Speaker (Planned) Justin Wayne Wilkerson
Abstract Scope Here, we develop a computational homogenization method which incorporates the size and spatial distribution of voids, measured from experimental tomography analysis, into microstructure-informed finite element models of additively manufactured AlSi10Mg rings subjected to rapid radial expansion and fragmentation. The central feature of the simulation model is an upscaling approach that converts microstructural morphology into a single initial porosity variable which changes spatially across the ring-shaped specimen to reflect the material's microstructural heterogeneity. The mechanical behavior of the porous aggregate is described using the Gurson-Tvergaard plasticity model, where fracture is assumed to occur when a critical porosity threshold is reached. Finite element calculations performed using ABAQUS are compared with the ring expansion tests. The observed qualitative agreement, along with a reasonable quantitative correlation between the simulation results and the experimental fragmentation statistics for high strain rates, lends support to the validity of the developed computational homogenization approach.
Proceedings Inclusion? Planned:

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