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�������պ����ѧѧ�� 2009, Vol. 35 Issue (8) :968-971    DOI:
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֧����������ȶԿ���Voronoi��ĭ �������ܵ�Ӱ��
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Effects of randomicity for strut cross-sectional areas on elastic properties of Voronoi open-cell foams
Lu Zixing, Wang Jianyue*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� Based on Voronoi random foam model, the random distribution of strut cross-sectional areas(SCSAs) was introduced, and its effects on nonlinear compressive and tensile behavior and anisotropic elastic properties were investigated. Influences of the model irregularity and randomicity of SCSAs on foams were compared, and the effects of their interaction were also discussed. The simulation results indicate that, the dimensionless stress decrease as SCSAs get less uniform under compression and tension, and this effect becomes more apparent as strain becomes larger. However, as randomicity of SCSAs increases the poisson-s ratios become smaller under compression while become larger under tension.The relative anisotropic elastic moduli in the elongated direction and perpendicular direction decrease as random degree of SCSAs increases, however, the influence on Poisson-s ratio is insignificant. The effect of the interaction between the two random factors appears to be weak under tension, but strong on anisotropic elastic properties.
Keywords�� foams   mechanical properties   Voronoi model   randomicity of SCSAs     
Received 2008-06-23;

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About author: ¬����(1960-),��,�ӱ���ǿ��,����,luzixing@buaa.edu.cn.
¬����, ������.֧����������ȶԿ���Voronoi��ĭ �������ܵ�Ӱ��[J]  �������պ����ѧѧ��, 2009,V35(8): 968-971
Lu Zixing, Wang Jianyue.Effects of randomicity for strut cross-sectional areas on elastic properties of Voronoi open-cell foams[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(8): 968-971
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