期刊
COMPUTATIONAL MATERIALS SCIENCE
卷 67, 期 -, 页码 133-139出版社
ELSEVIER
DOI: 10.1016/j.commatsci.2012.08.029
关键词
Aggregate shape; Failure behaviors; Heterogeneous meso-structure; Polyurethane polymer concrete; Numerical simulation
资金
- National Basic Research Program (973) of China [2011CB606105]
- National Natural Science Foundation of China [90916026]
The effects of aggregate shape and distribution on the strength and fracture behavior of Polyurethane Polymer Concrete (PPC) are analyzed through a numerical approach. A 2D FE model is constructed in which aggregates are modeled by random distributed polygon, and interfaces are the areas surrounding each aggregate. The mechanical parameters of the polyurethane (PU) matrix and the bonding properties between the PU matrix and aggregate are experimentally determined. Compressive testing of the PPC specimens is firstly carried out to provide experimental benchmark for calibration of the proposed numerical model. Numerical simulations of the model with static tension are then carried out using thirty generated specimens and the tensile stress-strain curves are obtained. It is found that the aggregate shape and distribution have significant effects on the failure behaviors of the PPC specimen under loading, i.e. the micro-cracks formation, growth and the failure strength. Based on numerical analysis, a threshold value of the aggregate polygon meso-statistical parameter is recommended, under which the PPC material presents the best mechanical properties. (C) 2012 Elsevier B.V. All rights reserved.
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