期刊
THEORETICAL AND APPLIED FRACTURE MECHANICS
卷 80, 期 -, 页码 87-95出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tafmec.2015.05.005
关键词
Polyurethane materials; Theory of critical distances; Notch; Mixed mode loading
资金
- Romanian National Authority for Scientific Research, CNCS - UEFISCDI [PN-II-ID-PCE-2011-3-0456, 172/2011]
The notch effect in Polyurethane materials of different densities is investigated. Tensile specimens with lateral V and U symmetric notches and with holes of different diameters were tested. The material parameters inherent stress and critical distance are determined using a linear elastic finite element analysis in conjunction with experimental results of average maximum load. The paper proposed an original correlation between critical distance and the cell diameter of the cellular structure, respectively between inherent stress and the ultimate tensile strength of Polyurethane materials. Then for single edge notch specimens a relationship between critical distance and applied mixed mode is found and successfully applied to assess the brittle mixed mode of Polyurethane materials. (C) 2015 Elsevier Ltd. All rights reserved.
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