期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 339, 期 -, 页码 262-280出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2018.05.002
关键词
State-based peridynamics; Zero-energy modes; Stabilization; Damage
资金
- National Natural Science Foundation of China [11472257, 11672278]
Non-ordinary state-based peridynamics suffers from zero-energy modes due to nodal integration, causing instabilities of the displacement, stress and strain fields. A stabilized non-ordinary state-based peridynamic model is derived according to the linearized bond-based peridynamic theory. The incorporation of supplemented force state excludes a zero-energy modes control coefficient and eliminates the need for complicated parameter adjustment. Finally, the parameter of strain energy ratio is defined to study the degree of influence of the zero-energy modes on the computation process. Four numerical examples are analyzed to demonstrate the effectiveness of the present model in controlling the zero-energy modes in non-ordinary state-based peridynamics. (C) 2018 Elsevier B.Y. All rights reserved.
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