期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 202, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2020.108539
关键词
Composite materials; Fracture toughness; Phase field model; Cohesive zone model
资金
- European Commission Graphene Flagship Core Project 3 (GrapheneCore3) [881603]
- EPSRC [EP/R010161/1, EP/R017727/1]
- Royal Commission for the 1851 Exhibition [RF496/2018]
- EPSRC [EP/R017727/1] Funding Source: UKRI
The computational framework accurately captures the crack path, interface debonding, and load versus displacement response of fiber-reinforced polymer composites. Sensitivity analysis on the crack growth resistance curve to matrix fracture toughness and fiber-matrix interface properties, as well as the influence of porosity on the R-curve, provide insights into microscopic fracture mechanisms and pave the way for efficient design of high fracture toughness composites.
We present a computational framework to explore the effect of microstructure and constituent properties upon the fracture toughness of fibre-reinforced polymer composites. To capture microscopic matrix cracking and fibre-matrix debonding, the framework couples a phase field fracture method and a cohesive zone model in the context of the finite element method. Virtual single-notched three point bending tests on fibre reinforced composites are conducted. The actual microstructure of the composite is simulated by an embedded cell in the fracture process zone, while the remaining area is homogenised to be an anisotropic elastic solid. A detailed comparison of the predicted results with experimental observations reveals that it is possible to accurately capture the crack path, interface debonding and load versus displacement response. The sensitivity of the crack growth resistance curve (R-curve) to the matrix fracture toughness and the fibre-matrix interface properties is determined. The influence of porosity upon the R-curve of fibre-reinforced composites is also explored, revealing a higher crack growth resistance with increasing void volume fraction. These results shed light into microscopic fracture mechanisms and set the basis for efficient design of high fracture toughness composites.
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