期刊
COMPOSITES PART B-ENGINEERING
卷 141, 期 -, 页码 258-264出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2017.12.062
关键词
Fracture; Numerical analysis; Computational modeling; XFEM (extended finite element method)
In the setting of emerging approaches for material design, we investigate the use of the extended finite element method (XFEM) to predict the behavior of a newly designed bone-inspired fiber-reinforced composite and to elucidate the role of the characteristic microstructural features and interfaces on the overall fracture behavior. The outcome of the simulations, showing a good agreement with the experimental results, reveals the fundamental role played by the heterogeneous microstructure in altering the stress field, reducing the stress concentration at the crack tip, and the crucial role of the interface region (i.e. cement line) in fostering the activation of characteristic toughening mechanisms, thus increasing the overall flaw tolerance of the composite.
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