期刊
ENGINEERING FRACTURE MECHANICS
卷 172, 期 -, 页码 39-60出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2016.12.012
关键词
Thick Level-Set; Fragmentation; Gradient damage
类别
资金
- Andrew Stershic's Department of Energy Computational Science Graduate Fellowship [DE-FG02-97ER25308]
- Sandia National Laboratories
- ERC Advanced Grant [XLS 291102]
The Thick Level-Set (TLS) model is implemented to simulate brittle media undergoing dynamic fragmentation. This non-local model is discretized by the finite element method with damage represented as a continuous field over the domain. A level-set function defines the extent and severity of damage, and a length scale is introduced to limit the damage gradient. Numerical studies of one-dimensional problems demonstrate that the proposed method reproduces the rate-dependent energy dissipation and fragment length observations from analytical, numerical, and experimental approaches. Additional studies emphasize the importance of appropriate bulk constitutive models and sufficient spatial resolution of the length scale. (C) 2017 Elsevier Ltd. All rights reserved.
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