期刊
COMPOSITE STRUCTURES
卷 232, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2019.111551
关键词
Composite material; Delamination; Matrix crack; Phase field model; Cohesive element
资金
- National Natural Science Foundation of China [11872143]
- Fundamental Research Funds for the Central Universities [DUT18LK06]
A numerical computational framework that combines a phase field model (PFM) and cohesive element (CE) for modelling progressive failure in composite material is proposed. In this setting, cracks in single material and the interface are captured separately by using the PFM and CE. A unified PFM that incorporates general cohesive softening laws is adopted for quasi-brittle fracture process. An energy split scheme is used to prevent material cracking under compressive state. The irreversibility of the damage evolution is enforced by introducing a history related energy density. The compatibility issue between the CE and PFM is considered for accurately capturing complicated failure mechanisms in composite. The developed approach is implemented into commercial software ABAQUS through user-defined subroutine element (UEL). Validation is made by modelling an experiment on delamination migration of a cross ply composite. Failure mechanisms including delamination, matrix crack, and location of delamination migration that observed in the experiment are all well captured. Moreover, the importance of considering the compatibility between CE and other numerical methods is discussed through a complementary modelling.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据