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Predicting failure of the Second Sandia Fracture Challenge geometry with a real-world, time constrained, over-the-counter methodology

  • An over-the-counter methodology to predict fracture initiation and propagation in the challenge specimen of the Second Sandia Fracture Challenge is detailed herein. This pragmatic approach mimics that of an engineer subjected to real-world time constraints and unquantified uncertainty. First, during the blind prediction phase of the challenge, flow and failure locus curves were calibrated for Ti–6Al–4V with provided tensile and shear test data for slow (0.0254 mm/s) and fast (25.4 mm/s) loading rates. Thereafter, these models were applied to a 3D finite-element mesh of the non-standardized challenge geometry with nominal dimensions to predict, among other items, crack path and specimen response. After the blind predictions were submitted to Sandia National Labs, they were improved upon by addressing anisotropic yielding, damage initiation under shear dominance, and boundary condition selection.

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Metadaten
Author:Albert R. Cerrone, Aida NonnORCiDGND, J. D. Hochhalter, Geoffrey F. BomaritoORCiD, J. E. Warner, Bruce J. CarterORCiD
DOI:https://doi.org/10.1007/s10704-016-0086-x
Parent Title (English):International Journal of Fracture
Document Type:Article
Language:English
Year of first Publication:2016
Release Date:2021/03/17
Tag:Anisotropic yielding; Failure locus curve; Sandia Fracture Challenge; Ti–6Al–4V
Volume:198
Issue:1-2
First Page:117
Last Page:126
Institutes:Fakultät Maschinenbau
Technologie-Campus Neustadt an der Donau
Fakultät Maschinenbau / Computational Mechanics and Materials Lab (CMM)
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
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