کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
280287 | 1430401 | 2005 | 15 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Three-dimensional modeling of the mechanical property of linearly elastic open cell foams Three-dimensional modeling of the mechanical property of linearly elastic open cell foams](/preview/png/280287.png)
Three-dimensional Voronoi models are developed to investigate the mechanical behavior of linearly elastic open cell foams. Dependence of the Young’s modulus, Poisson’s ratio and bulk modulus of the foams on the relative density is evaluated through finite element analysis. Obtained results show that in the low density regime the Young’s modulus and bulk modulus of random Voronoi foams can be well represented by those of Kelvin foams, and are sensitive to the geometric imperfections inherent in the microstructure of foams. In contrast, the compressive plateau stress of the foams is less sensitive to the imperfections. Failure surface of the foams subject to multi-axial compression is determined and is found to comply with the maximum compressive principal stress criterion, consistent with available experimental observations on polymer foams. Numerical results also show that elastic buckling of cell edges at microscopic level is the dominant mechanism responsible for the compressive failure of elastic open cell foams.
Journal: International Journal of Solids and Structures - Volume 42, Issue 26, December 2005, Pages 6628–6642