Numerical Analysis of the Fracture Toughness of Low-Density Open-Cell Voronoi Foams

被引：0
作者：
J. E. Li
B. L. Wang
S. L. Guo
机构：
[1] Jinling Institute of Technology,School of Architectural Engineering
[2] Harbin Institute of Technology,Graduate School at Shenzhen
来源：
Mechanics of Composite Materials | 2019年 / 54卷
关键词：
open-cell foams; Voronoi tessellation; fracture toughness; finite-element method; micromechanics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this study, the geometry of open-cell foams is simulated using a model based on Voronoi tessellations. The fracture toughness of open-cell foams with Voronoi cells, including Mode-I, Mode-II, and the mixed-mode ones, are calculated by the finite-element method based on a micromechanical model. Cracks in the micromechanical model are created through removing some number of cells pertaining to the crack length. Displacement boundary conditions are applied to the boundary of a small region surrounding the crack tip, which are calculated based on the linear elastic fracture mechanics. The effects of relative density, disorder factor and sample size on the predicted elastic properties and fracture toughness of open-cell foams with Voronoi cells are discussed and compared with results available in the literature.
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页码：789 / 798
页数：9
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  • [1] Phelan R(1995)Computation of equilibrium foam structures using the surface evolver Experimental Mathematics 4 181-192
  • [2] Weaire D(2000)Thermal radiation properties of dispersed media: theoretical prediction and experimental characterization J. Quantitative Spectroscopy & Radiative Transfer 67 327-363
  • [3] Brakke K(2001)On the effective thermal conductivity of a three-dimensionally structured fluid-saturated metal foam Int. J. Heat Mass Transfer 44 827-836
  • [4] Baillis D(2002)Thermophysical properties of high porosity metal foams Int. J. Heat Mass Transfer 45 1017-1031
  • [5] Sacadura JF(2011)The effective thermal conductivity for “slim” and “fat” foams Am. Institute of Chemical Engineers 57 1646-1651
  • [6] Boomsma K(2009)Towards a more realistic modeling of solid foam: Use of the pentagonal dodecahedron geometry Chem. Eng. Sci. 64 5131-5142
  • [7] Poulikakos D(1997)On the linear elastic properties of regular and random open-cell foam models J. Cellular Plastics 33 31-54
  • [8] Bhattacharya A(2014)Equivalent thermal conductivity of open cell ceramics foams at high temperatures Int. J. Thermophys. 35 105-122
  • [9] Calmidi VV(2012)Conductive and radiative heat transfer in ceramic and metal foams at fire temperatures Fire Technol. 48 699-732
  • [10] Mahajan RL(2012)Effect of foam properties on heat transfer in open-cell foam inserts J. Am. Ceramic Soc. 95 2015-2021
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