کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
280332 | 1430389 | 2006 | 20 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An elastic–plastic crack bridging model for brittle-matrix fibrous composite beams under cyclic loading An elastic–plastic crack bridging model for brittle-matrix fibrous composite beams under cyclic loading](/preview/png/280332.png)
A fibrous composite beam with an edge crack is submitted to a cyclic bending moment and the crack bridging actions due to the fibers. Assuming a general elastic-linearly hardening crack bridging model for the fibers and a linear-elastic law for the matrix, the statically indeterminate bridging actions are obtained from compatibility conditions. The elastic and plastic shake-down phenomena are examined in terms of generalised cross-sectional quantities and, by employing a fatigue crack growth law, the mechanical behaviour up to failure is captured. Within the framework of the proposed fracture mechanics-based model, the cyclic crack bridging due to debonding at fiber–matrix interface of short fibers is analysed in depth. By means of some simplifying assumptions, such a phenomenon can be described by a linear isotropic tensile softening/compressive hardening law. Finally, numerical examples are presented for fibrous composite beams with randomly distributed short fibers.
Journal: International Journal of Solids and Structures - Volume 43, Issue 16, August 2006, Pages 4917–4936